1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.util; 27 28 import java.io.BufferedWriter; 29 import java.io.Closeable; 30 import java.io.IOException; 31 import java.io.File; 32 import java.io.FileOutputStream; 33 import java.io.FileNotFoundException; 34 import java.io.Flushable; 35 import java.io.OutputStream; 36 import java.io.OutputStreamWriter; 37 import java.io.PrintStream; 38 import java.io.UnsupportedEncodingException; 39 import java.math.BigDecimal; 40 import java.math.BigInteger; 41 import java.math.MathContext; 42 import java.math.RoundingMode; 43 import java.nio.charset.Charset; 44 import java.nio.charset.IllegalCharsetNameException; 45 import java.nio.charset.UnsupportedCharsetException; 46 import java.text.DateFormatSymbols; 47 import java.text.DecimalFormat; 48 import java.text.DecimalFormatSymbols; 49 import java.text.NumberFormat; 50 import java.util.regex.Matcher; 51 import java.util.regex.Pattern; 52 53 import java.time.DateTimeException; 54 import java.time.Instant; 55 import java.time.ZoneId; 56 import java.time.ZoneOffset; 57 import java.time.temporal.ChronoField; 58 import java.time.temporal.TemporalAccessor; 59 import java.time.temporal.TemporalQueries; 60 61 import sun.misc.DoubleConsts; 62 import sun.misc.FormattedFloatingDecimal; 63 64 /** 65 * An interpreter for printf-style format strings. This class provides support 66 * for layout justification and alignment, common formats for numeric, string, 67 * and date/time data, and locale-specific output. Common Java types such as 68 * {@code byte}, {@link java.math.BigDecimal BigDecimal}, and {@link Calendar} 69 * are supported. Limited formatting customization for arbitrary user types is 70 * provided through the {@link Formattable} interface. 71 * 72 * <p> Formatters are not necessarily safe for multithreaded access. Thread 73 * safety is optional and is the responsibility of users of methods in this 74 * class. 75 * 76 * <p> Formatted printing for the Java language is heavily inspired by C's 77 * {@code printf}. Although the format strings are similar to C, some 78 * customizations have been made to accommodate the Java language and exploit 79 * some of its features. Also, Java formatting is more strict than C's; for 80 * example, if a conversion is incompatible with a flag, an exception will be 81 * thrown. In C inapplicable flags are silently ignored. The format strings 82 * are thus intended to be recognizable to C programmers but not necessarily 83 * completely compatible with those in C. 84 * 85 * <p> Examples of expected usage: 86 * 87 * <blockquote><pre> 88 * StringBuilder sb = new StringBuilder(); 89 * // Send all output to the Appendable object sb 90 * Formatter formatter = new Formatter(sb, Locale.US); 91 * 92 * // Explicit argument indices may be used to re-order output. 93 * formatter.format("%4$2s %3$2s %2$2s %1$2s", "a", "b", "c", "d") 94 * // -> " d c b a" 95 * 96 * // Optional locale as the first argument can be used to get 97 * // locale-specific formatting of numbers. The precision and width can be 98 * // given to round and align the value. 99 * formatter.format(Locale.FRANCE, "e = %+10.4f", Math.E); 100 * // -> "e = +2,7183" 101 * 102 * // The '(' numeric flag may be used to format negative numbers with 103 * // parentheses rather than a minus sign. Group separators are 104 * // automatically inserted. 105 * formatter.format("Amount gained or lost since last statement: $ %(,.2f", 106 * balanceDelta); 107 * // -> "Amount gained or lost since last statement: $ (6,217.58)" 108 * </pre></blockquote> 109 * 110 * <p> Convenience methods for common formatting requests exist as illustrated 111 * by the following invocations: 112 * 113 * <blockquote><pre> 114 * // Writes a formatted string to System.out. 115 * System.out.format("Local time: %tT", Calendar.getInstance()); 116 * // -> "Local time: 13:34:18" 117 * 118 * // Writes formatted output to System.err. 119 * System.err.printf("Unable to open file '%1$s': %2$s", 120 * fileName, exception.getMessage()); 121 * // -> "Unable to open file 'food': No such file or directory" 122 * </pre></blockquote> 123 * 124 * <p> Like C's {@code sprintf(3)}, Strings may be formatted using the static 125 * method {@link String#format(String,Object...) String.format}: 126 * 127 * <blockquote><pre> 128 * // Format a string containing a date. 129 * import java.util.Calendar; 130 * import java.util.GregorianCalendar; 131 * import static java.util.Calendar.*; 132 * 133 * Calendar c = new GregorianCalendar(1995, MAY, 23); 134 * String s = String.format("Duke's Birthday: %1$tb %1$te, %1$tY", c); 135 * // -> s == "Duke's Birthday: May 23, 1995" 136 * </pre></blockquote> 137 * 138 * <h3><a name="org">Organization</a></h3> 139 * 140 * <p> This specification is divided into two sections. The first section, <a 141 * href="#summary">Summary</a>, covers the basic formatting concepts. This 142 * section is intended for users who want to get started quickly and are 143 * familiar with formatted printing in other programming languages. The second 144 * section, <a href="#detail">Details</a>, covers the specific implementation 145 * details. It is intended for users who want more precise specification of 146 * formatting behavior. 147 * 148 * <h3><a name="summary">Summary</a></h3> 149 * 150 * <p> This section is intended to provide a brief overview of formatting 151 * concepts. For precise behavioral details, refer to the <a 152 * href="#detail">Details</a> section. 153 * 154 * <h4><a name="syntax">Format String Syntax</a></h4> 155 * 156 * <p> Every method which produces formatted output requires a <i>format 157 * string</i> and an <i>argument list</i>. The format string is a {@link 158 * String} which may contain fixed text and one or more embedded <i>format 159 * specifiers</i>. Consider the following example: 160 * 161 * <blockquote><pre> 162 * Calendar c = ...; 163 * String s = String.format("Duke's Birthday: %1$tm %1$te,%1$tY", c); 164 * </pre></blockquote> 165 * 166 * This format string is the first argument to the {@code format} method. It 167 * contains three format specifiers "{@code %1$tm}", "{@code %1$te}", and 168 * "{@code %1$tY}" which indicate how the arguments should be processed and 169 * where they should be inserted in the text. The remaining portions of the 170 * format string are fixed text including {@code "Dukes Birthday: "} and any 171 * other spaces or punctuation. 172 * 173 * The argument list consists of all arguments passed to the method after the 174 * format string. In the above example, the argument list is of size one and 175 * consists of the {@link java.util.Calendar Calendar} object {@code c}. 176 * 177 * <ul> 178 * 179 * <li> The format specifiers for general, character, and numeric types have 180 * the following syntax: 181 * 182 * <blockquote><pre> 183 * %[argument_index$][flags][width][.precision]conversion 184 * </pre></blockquote> 185 * 186 * <p> The optional <i>argument_index</i> is a decimal integer indicating the 187 * position of the argument in the argument list. The first argument is 188 * referenced by "{@code 1$}", the second by "{@code 2$}", etc. 189 * 190 * <p> The optional <i>flags</i> is a set of characters that modify the output 191 * format. The set of valid flags depends on the conversion. 192 * 193 * <p> The optional <i>width</i> is a positive decimal integer indicating 194 * the minimum number of characters to be written to the output. 195 * 196 * <p> The optional <i>precision</i> is a non-negative decimal integer usually 197 * used to restrict the number of characters. The specific behavior depends on 198 * the conversion. 199 * 200 * <p> The required <i>conversion</i> is a character indicating how the 201 * argument should be formatted. The set of valid conversions for a given 202 * argument depends on the argument's data type. 203 * 204 * <li> The format specifiers for types which are used to represents dates and 205 * times have the following syntax: 206 * 207 * <blockquote><pre> 208 * %[argument_index$][flags][width]conversion 209 * </pre></blockquote> 210 * 211 * <p> The optional <i>argument_index</i>, <i>flags</i> and <i>width</i> are 212 * defined as above. 213 * 214 * <p> The required <i>conversion</i> is a two character sequence. The first 215 * character is {@code 't'} or {@code 'T'}. The second character indicates 216 * the format to be used. These characters are similar to but not completely 217 * identical to those defined by GNU {@code date} and POSIX 218 * {@code strftime(3c)}. 219 * 220 * <li> The format specifiers which do not correspond to arguments have the 221 * following syntax: 222 * 223 * <blockquote><pre> 224 * %[flags][width]conversion 225 * </pre></blockquote> 226 * 227 * <p> The optional <i>flags</i> and <i>width</i> is defined as above. 228 * 229 * <p> The required <i>conversion</i> is a character indicating content to be 230 * inserted in the output. 231 * 232 * </ul> 233 * 234 * <h4> Conversions </h4> 235 * 236 * <p> Conversions are divided into the following categories: 237 * 238 * <ol> 239 * 240 * <li> <b>General</b> - may be applied to any argument 241 * type 242 * 243 * <li> <b>Character</b> - may be applied to basic types which represent 244 * Unicode characters: {@code char}, {@link Character}, {@code byte}, {@link 245 * Byte}, {@code short}, and {@link Short}. This conversion may also be 246 * applied to the types {@code int} and {@link Integer} when {@link 247 * Character#isValidCodePoint} returns {@code true} 248 * 249 * <li> <b>Numeric</b> 250 * 251 * <ol> 252 * 253 * <li> <b>Integral</b> - may be applied to Java integral types: {@code byte}, 254 * {@link Byte}, {@code short}, {@link Short}, {@code int} and {@link 255 * Integer}, {@code long}, {@link Long}, and {@link java.math.BigInteger 256 * BigInteger} (but not {@code char} or {@link Character}) 257 * 258 * <li><b>Floating Point</b> - may be applied to Java floating-point types: 259 * {@code float}, {@link Float}, {@code double}, {@link Double}, and {@link 260 * java.math.BigDecimal BigDecimal} 261 * 262 * </ol> 263 * 264 * <li> <b>Date/Time</b> - may be applied to Java types which are capable of 265 * encoding a date or time: {@code long}, {@link Long}, {@link Calendar}, 266 * {@link Date} and {@link TemporalAccessor TemporalAccessor} 267 * 268 * <li> <b>Percent</b> - produces a literal {@code '%'} 269 * (<tt>'\u0025'</tt>) 270 * 271 * <li> <b>Line Separator</b> - produces the platform-specific line separator 272 * 273 * </ol> 274 * 275 * <p> The following table summarizes the supported conversions. Conversions 276 * denoted by an upper-case character (i.e. {@code 'B'}, {@code 'H'}, 277 * {@code 'S'}, {@code 'C'}, {@code 'X'}, {@code 'E'}, {@code 'G'}, 278 * {@code 'A'}, and {@code 'T'}) are the same as those for the corresponding 279 * lower-case conversion characters except that the result is converted to 280 * upper case according to the rules of the prevailing {@link java.util.Locale 281 * Locale}. The result is equivalent to the following invocation of {@link 282 * String#toUpperCase()} 283 * 284 * <pre> 285 * out.toUpperCase() </pre> 286 * 287 * <table cellpadding=5 summary="genConv"> 288 * 289 * <tr><th valign="bottom"> Conversion 290 * <th valign="bottom"> Argument Category 291 * <th valign="bottom"> Description 292 * 293 * <tr><td valign="top"> {@code 'b'}, {@code 'B'} 294 * <td valign="top"> general 295 * <td> If the argument <i>arg</i> is {@code null}, then the result is 296 * "{@code false}". If <i>arg</i> is a {@code boolean} or {@link 297 * Boolean}, then the result is the string returned by {@link 298 * String#valueOf(boolean) String.valueOf(arg)}. Otherwise, the result is 299 * "true". 300 * 301 * <tr><td valign="top"> {@code 'h'}, {@code 'H'} 302 * <td valign="top"> general 303 * <td> If the argument <i>arg</i> is {@code null}, then the result is 304 * "{@code null}". Otherwise, the result is obtained by invoking 305 * {@code Integer.toHexString(arg.hashCode())}. 306 * 307 * <tr><td valign="top"> {@code 's'}, {@code 'S'} 308 * <td valign="top"> general 309 * <td> If the argument <i>arg</i> is {@code null}, then the result is 310 * "{@code null}". If <i>arg</i> implements {@link Formattable}, then 311 * {@link Formattable#formatTo arg.formatTo} is invoked. Otherwise, the 312 * result is obtained by invoking {@code arg.toString()}. 313 * 314 * <tr><td valign="top">{@code 'c'}, {@code 'C'} 315 * <td valign="top"> character 316 * <td> The result is a Unicode character 317 * 318 * <tr><td valign="top">{@code 'd'} 319 * <td valign="top"> integral 320 * <td> The result is formatted as a decimal integer 321 * 322 * <tr><td valign="top">{@code 'o'} 323 * <td valign="top"> integral 324 * <td> The result is formatted as an octal integer 325 * 326 * <tr><td valign="top">{@code 'x'}, {@code 'X'} 327 * <td valign="top"> integral 328 * <td> The result is formatted as a hexadecimal integer 329 * 330 * <tr><td valign="top">{@code 'e'}, {@code 'E'} 331 * <td valign="top"> floating point 332 * <td> The result is formatted as a decimal number in computerized 333 * scientific notation 334 * 335 * <tr><td valign="top">{@code 'f'} 336 * <td valign="top"> floating point 337 * <td> The result is formatted as a decimal number 338 * 339 * <tr><td valign="top">{@code 'g'}, {@code 'G'} 340 * <td valign="top"> floating point 341 * <td> The result is formatted using computerized scientific notation or 342 * decimal format, depending on the precision and the value after rounding. 343 * 344 * <tr><td valign="top">{@code 'a'}, {@code 'A'} 345 * <td valign="top"> floating point 346 * <td> The result is formatted as a hexadecimal floating-point number with 347 * a significand and an exponent. This conversion is <b>not</b> supported 348 * for the {@code BigDecimal} type despite the latter's being in the 349 * <i>floating point</i> argument category. 350 * 351 * <tr><td valign="top">{@code 't'}, {@code 'T'} 352 * <td valign="top"> date/time 353 * <td> Prefix for date and time conversion characters. See <a 354 * href="#dt">Date/Time Conversions</a>. 355 * 356 * <tr><td valign="top">{@code '%'} 357 * <td valign="top"> percent 358 * <td> The result is a literal {@code '%'} (<tt>'\u0025'</tt>) 359 * 360 * <tr><td valign="top">{@code 'n'} 361 * <td valign="top"> line separator 362 * <td> The result is the platform-specific line separator 363 * 364 * </table> 365 * 366 * <p> Any characters not explicitly defined as conversions are illegal and are 367 * reserved for future extensions. 368 * 369 * <h4><a name="dt">Date/Time Conversions</a></h4> 370 * 371 * <p> The following date and time conversion suffix characters are defined for 372 * the {@code 't'} and {@code 'T'} conversions. The types are similar to but 373 * not completely identical to those defined by GNU {@code date} and POSIX 374 * {@code strftime(3c)}. Additional conversion types are provided to access 375 * Java-specific functionality (e.g. {@code 'L'} for milliseconds within the 376 * second). 377 * 378 * <p> The following conversion characters are used for formatting times: 379 * 380 * <table cellpadding=5 summary="time"> 381 * 382 * <tr><td valign="top"> {@code 'H'} 383 * <td> Hour of the day for the 24-hour clock, formatted as two digits with 384 * a leading zero as necessary i.e. {@code 00 - 23}. 385 * 386 * <tr><td valign="top">{@code 'I'} 387 * <td> Hour for the 12-hour clock, formatted as two digits with a leading 388 * zero as necessary, i.e. {@code 01 - 12}. 389 * 390 * <tr><td valign="top">{@code 'k'} 391 * <td> Hour of the day for the 24-hour clock, i.e. {@code 0 - 23}. 392 * 393 * <tr><td valign="top">{@code 'l'} 394 * <td> Hour for the 12-hour clock, i.e. {@code 1 - 12}. 395 * 396 * <tr><td valign="top">{@code 'M'} 397 * <td> Minute within the hour formatted as two digits with a leading zero 398 * as necessary, i.e. {@code 00 - 59}. 399 * 400 * <tr><td valign="top">{@code 'S'} 401 * <td> Seconds within the minute, formatted as two digits with a leading 402 * zero as necessary, i.e. {@code 00 - 60} ("{@code 60}" is a special 403 * value required to support leap seconds). 404 * 405 * <tr><td valign="top">{@code 'L'} 406 * <td> Millisecond within the second formatted as three digits with 407 * leading zeros as necessary, i.e. {@code 000 - 999}. 408 * 409 * <tr><td valign="top">{@code 'N'} 410 * <td> Nanosecond within the second, formatted as nine digits with leading 411 * zeros as necessary, i.e. {@code 000000000 - 999999999}. 412 * 413 * <tr><td valign="top">{@code 'p'} 414 * <td> Locale-specific {@linkplain 415 * java.text.DateFormatSymbols#getAmPmStrings morning or afternoon} marker 416 * in lower case, e.g."{@code am}" or "{@code pm}". Use of the conversion 417 * prefix {@code 'T'} forces this output to upper case. 418 * 419 * <tr><td valign="top">{@code 'z'} 420 * <td> <a href="http://www.ietf.org/rfc/rfc0822.txt">RFC 822</a> 421 * style numeric time zone offset from GMT, e.g. {@code -0800}. This 422 * value will be adjusted as necessary for Daylight Saving Time. For 423 * {@code long}, {@link Long}, and {@link Date} the time zone used is 424 * the {@linkplain TimeZone#getDefault() default time zone} for this 425 * instance of the Java virtual machine. 426 * 427 * <tr><td valign="top">{@code 'Z'} 428 * <td> A string representing the abbreviation for the time zone. This 429 * value will be adjusted as necessary for Daylight Saving Time. For 430 * {@code long}, {@link Long}, and {@link Date} the time zone used is 431 * the {@linkplain TimeZone#getDefault() default time zone} for this 432 * instance of the Java virtual machine. The Formatter's locale will 433 * supersede the locale of the argument (if any). 434 * 435 * <tr><td valign="top">{@code 's'} 436 * <td> Seconds since the beginning of the epoch starting at 1 January 1970 437 * {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE/1000} to 438 * {@code Long.MAX_VALUE/1000}. 439 * 440 * <tr><td valign="top">{@code 'Q'} 441 * <td> Milliseconds since the beginning of the epoch starting at 1 January 442 * 1970 {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE} to 443 * {@code Long.MAX_VALUE}. 444 * 445 * </table> 446 * 447 * <p> The following conversion characters are used for formatting dates: 448 * 449 * <table cellpadding=5 summary="date"> 450 * 451 * <tr><td valign="top">{@code 'B'} 452 * <td> Locale-specific {@linkplain java.text.DateFormatSymbols#getMonths 453 * full month name}, e.g. {@code "January"}, {@code "February"}. 454 * 455 * <tr><td valign="top">{@code 'b'} 456 * <td> Locale-specific {@linkplain 457 * java.text.DateFormatSymbols#getShortMonths abbreviated month name}, 458 * e.g. {@code "Jan"}, {@code "Feb"}. 459 * 460 * <tr><td valign="top">{@code 'h'} 461 * <td> Same as {@code 'b'}. 462 * 463 * <tr><td valign="top">{@code 'A'} 464 * <td> Locale-specific full name of the {@linkplain 465 * java.text.DateFormatSymbols#getWeekdays day of the week}, 466 * e.g. {@code "Sunday"}, {@code "Monday"} 467 * 468 * <tr><td valign="top">{@code 'a'} 469 * <td> Locale-specific short name of the {@linkplain 470 * java.text.DateFormatSymbols#getShortWeekdays day of the week}, 471 * e.g. {@code "Sun"}, {@code "Mon"} 472 * 473 * <tr><td valign="top">{@code 'C'} 474 * <td> Four-digit year divided by {@code 100}, formatted as two digits 475 * with leading zero as necessary, i.e. {@code 00 - 99} 476 * 477 * <tr><td valign="top">{@code 'Y'} 478 * <td> Year, formatted as at least four digits with leading zeros as 479 * necessary, e.g. {@code 0092} equals {@code 92} CE for the Gregorian 480 * calendar. 481 * 482 * <tr><td valign="top">{@code 'y'} 483 * <td> Last two digits of the year, formatted with leading zeros as 484 * necessary, i.e. {@code 00 - 99}. 485 * 486 * <tr><td valign="top">{@code 'j'} 487 * <td> Day of year, formatted as three digits with leading zeros as 488 * necessary, e.g. {@code 001 - 366} for the Gregorian calendar. 489 * 490 * <tr><td valign="top">{@code 'm'} 491 * <td> Month, formatted as two digits with leading zeros as necessary, 492 * i.e. {@code 01 - 13}. 493 * 494 * <tr><td valign="top">{@code 'd'} 495 * <td> Day of month, formatted as two digits with leading zeros as 496 * necessary, i.e. {@code 01 - 31} 497 * 498 * <tr><td valign="top">{@code 'e'} 499 * <td> Day of month, formatted as two digits, i.e. {@code 1 - 31}. 500 * 501 * </table> 502 * 503 * <p> The following conversion characters are used for formatting common 504 * date/time compositions. 505 * 506 * <table cellpadding=5 summary="composites"> 507 * 508 * <tr><td valign="top">{@code 'R'} 509 * <td> Time formatted for the 24-hour clock as {@code "%tH:%tM"} 510 * 511 * <tr><td valign="top">{@code 'T'} 512 * <td> Time formatted for the 24-hour clock as {@code "%tH:%tM:%tS"}. 513 * 514 * <tr><td valign="top">{@code 'r'} 515 * <td> Time formatted for the 12-hour clock as {@code "%tI:%tM:%tS %Tp"}. 516 * The location of the morning or afternoon marker ({@code '%Tp'}) may be 517 * locale-dependent. 518 * 519 * <tr><td valign="top">{@code 'D'} 520 * <td> Date formatted as {@code "%tm/%td/%ty"}. 521 * 522 * <tr><td valign="top">{@code 'F'} 523 * <td> <a href="http://www.w3.org/TR/NOTE-datetime">ISO 8601</a> 524 * complete date formatted as {@code "%tY-%tm-%td"}. 525 * 526 * <tr><td valign="top">{@code 'c'} 527 * <td> Date and time formatted as {@code "%ta %tb %td %tT %tZ %tY"}, 528 * e.g. {@code "Sun Jul 20 16:17:00 EDT 1969"}. 529 * 530 * </table> 531 * 532 * <p> Any characters not explicitly defined as date/time conversion suffixes 533 * are illegal and are reserved for future extensions. 534 * 535 * <h4> Flags </h4> 536 * 537 * <p> The following table summarizes the supported flags. <i>y</i> means the 538 * flag is supported for the indicated argument types. 539 * 540 * <table cellpadding=5 summary="genConv"> 541 * 542 * <tr><th valign="bottom"> Flag <th valign="bottom"> General 543 * <th valign="bottom"> Character <th valign="bottom"> Integral 544 * <th valign="bottom"> Floating Point 545 * <th valign="bottom"> Date/Time 546 * <th valign="bottom"> Description 547 * 548 * <tr><td> '-' <td align="center" valign="top"> y 549 * <td align="center" valign="top"> y 550 * <td align="center" valign="top"> y 551 * <td align="center" valign="top"> y 552 * <td align="center" valign="top"> y 553 * <td> The result will be left-justified. 554 * 555 * <tr><td> '#' <td align="center" valign="top"> y<sup>1</sup> 556 * <td align="center" valign="top"> - 557 * <td align="center" valign="top"> y<sup>3</sup> 558 * <td align="center" valign="top"> y 559 * <td align="center" valign="top"> - 560 * <td> The result should use a conversion-dependent alternate form 561 * 562 * <tr><td> '+' <td align="center" valign="top"> - 563 * <td align="center" valign="top"> - 564 * <td align="center" valign="top"> y<sup>4</sup> 565 * <td align="center" valign="top"> y 566 * <td align="center" valign="top"> - 567 * <td> The result will always include a sign 568 * 569 * <tr><td> ' ' <td align="center" valign="top"> - 570 * <td align="center" valign="top"> - 571 * <td align="center" valign="top"> y<sup>4</sup> 572 * <td align="center" valign="top"> y 573 * <td align="center" valign="top"> - 574 * <td> The result will include a leading space for positive values 575 * 576 * <tr><td> '0' <td align="center" valign="top"> - 577 * <td align="center" valign="top"> - 578 * <td align="center" valign="top"> y 579 * <td align="center" valign="top"> y 580 * <td align="center" valign="top"> - 581 * <td> The result will be zero-padded 582 * 583 * <tr><td> ',' <td align="center" valign="top"> - 584 * <td align="center" valign="top"> - 585 * <td align="center" valign="top"> y<sup>2</sup> 586 * <td align="center" valign="top"> y<sup>5</sup> 587 * <td align="center" valign="top"> - 588 * <td> The result will include locale-specific {@linkplain 589 * java.text.DecimalFormatSymbols#getGroupingSeparator grouping separators} 590 * 591 * <tr><td> '(' <td align="center" valign="top"> - 592 * <td align="center" valign="top"> - 593 * <td align="center" valign="top"> y<sup>4</sup> 594 * <td align="center" valign="top"> y<sup>5</sup> 595 * <td align="center"> - 596 * <td> The result will enclose negative numbers in parentheses 597 * 598 * </table> 599 * 600 * <p> <sup>1</sup> Depends on the definition of {@link Formattable}. 601 * 602 * <p> <sup>2</sup> For {@code 'd'} conversion only. 603 * 604 * <p> <sup>3</sup> For {@code 'o'}, {@code 'x'}, and {@code 'X'} 605 * conversions only. 606 * 607 * <p> <sup>4</sup> For {@code 'd'}, {@code 'o'}, {@code 'x'}, and 608 * {@code 'X'} conversions applied to {@link java.math.BigInteger BigInteger} 609 * or {@code 'd'} applied to {@code byte}, {@link Byte}, {@code short}, {@link 610 * Short}, {@code int} and {@link Integer}, {@code long}, and {@link Long}. 611 * 612 * <p> <sup>5</sup> For {@code 'e'}, {@code 'E'}, {@code 'f'}, 613 * {@code 'g'}, and {@code 'G'} conversions only. 614 * 615 * <p> Any characters not explicitly defined as flags are illegal and are 616 * reserved for future extensions. 617 * 618 * <h4> Width </h4> 619 * 620 * <p> The width is the minimum number of characters to be written to the 621 * output. For the line separator conversion, width is not applicable; if it 622 * is provided, an exception will be thrown. 623 * 624 * <h4> Precision </h4> 625 * 626 * <p> For general argument types, the precision is the maximum number of 627 * characters to be written to the output. 628 * 629 * <p> For the floating-point conversions {@code 'a'}, {@code 'A'}, {@code 'e'}, 630 * {@code 'E'}, and {@code 'f'} the precision is the number of digits after the 631 * radix point. If the conversion is {@code 'g'} or {@code 'G'}, then the 632 * precision is the total number of digits in the resulting magnitude after 633 * rounding. 634 * 635 * <p> For character, integral, and date/time argument types and the percent 636 * and line separator conversions, the precision is not applicable; if a 637 * precision is provided, an exception will be thrown. 638 * 639 * <h4> Argument Index </h4> 640 * 641 * <p> The argument index is a decimal integer indicating the position of the 642 * argument in the argument list. The first argument is referenced by 643 * "{@code 1$}", the second by "{@code 2$}", etc. 644 * 645 * <p> Another way to reference arguments by position is to use the 646 * {@code '<'} (<tt>'\u003c'</tt>) flag, which causes the argument for 647 * the previous format specifier to be re-used. For example, the following two 648 * statements would produce identical strings: 649 * 650 * <blockquote><pre> 651 * Calendar c = ...; 652 * String s1 = String.format("Duke's Birthday: %1$tm %1$te,%1$tY", c); 653 * 654 * String s2 = String.format("Duke's Birthday: %1$tm %<te,%<tY", c); 655 * </pre></blockquote> 656 * 657 * <hr> 658 * <h3><a name="detail">Details</a></h3> 659 * 660 * <p> This section is intended to provide behavioral details for formatting, 661 * including conditions and exceptions, supported data types, localization, and 662 * interactions between flags, conversions, and data types. For an overview of 663 * formatting concepts, refer to the <a href="#summary">Summary</a> 664 * 665 * <p> Any characters not explicitly defined as conversions, date/time 666 * conversion suffixes, or flags are illegal and are reserved for 667 * future extensions. Use of such a character in a format string will 668 * cause an {@link UnknownFormatConversionException} or {@link 669 * UnknownFormatFlagsException} to be thrown. 670 * 671 * <p> If the format specifier contains a width or precision with an invalid 672 * value or which is otherwise unsupported, then a {@link 673 * IllegalFormatWidthException} or {@link IllegalFormatPrecisionException} 674 * respectively will be thrown. 675 * 676 * <p> If a format specifier contains a conversion character that is not 677 * applicable to the corresponding argument, then an {@link 678 * IllegalFormatConversionException} will be thrown. 679 * 680 * <p> All specified exceptions may be thrown by any of the {@code format} 681 * methods of {@code Formatter} as well as by any {@code format} convenience 682 * methods such as {@link String#format(String,Object...) String.format} and 683 * {@link java.io.PrintStream#printf(String,Object...) PrintStream.printf}. 684 * 685 * <p> Conversions denoted by an upper-case character (i.e. {@code 'B'}, 686 * {@code 'H'}, {@code 'S'}, {@code 'C'}, {@code 'X'}, {@code 'E'}, 687 * {@code 'G'}, {@code 'A'}, and {@code 'T'}) are the same as those for the 688 * corresponding lower-case conversion characters except that the result is 689 * converted to upper case according to the rules of the prevailing {@link 690 * java.util.Locale Locale}. The result is equivalent to the following 691 * invocation of {@link String#toUpperCase()} 692 * 693 * <pre> 694 * out.toUpperCase() </pre> 695 * 696 * <h4><a name="dgen">General</a></h4> 697 * 698 * <p> The following general conversions may be applied to any argument type: 699 * 700 * <table cellpadding=5 summary="dgConv"> 701 * 702 * <tr><td valign="top"> {@code 'b'} 703 * <td valign="top"> <tt>'\u0062'</tt> 704 * <td> Produces either "{@code true}" or "{@code false}" as returned by 705 * {@link Boolean#toString(boolean)}. 706 * 707 * <p> If the argument is {@code null}, then the result is 708 * "{@code false}". If the argument is a {@code boolean} or {@link 709 * Boolean}, then the result is the string returned by {@link 710 * String#valueOf(boolean) String.valueOf()}. Otherwise, the result is 711 * "{@code true}". 712 * 713 * <p> If the {@code '#'} flag is given, then a {@link 714 * FormatFlagsConversionMismatchException} will be thrown. 715 * 716 * <tr><td valign="top"> {@code 'B'} 717 * <td valign="top"> <tt>'\u0042'</tt> 718 * <td> The upper-case variant of {@code 'b'}. 719 * 720 * <tr><td valign="top"> {@code 'h'} 721 * <td valign="top"> <tt>'\u0068'</tt> 722 * <td> Produces a string representing the hash code value of the object. 723 * 724 * <p> If the argument, <i>arg</i> is {@code null}, then the 725 * result is "{@code null}". Otherwise, the result is obtained 726 * by invoking {@code Integer.toHexString(arg.hashCode())}. 727 * 728 * <p> If the {@code '#'} flag is given, then a {@link 729 * FormatFlagsConversionMismatchException} will be thrown. 730 * 731 * <tr><td valign="top"> {@code 'H'} 732 * <td valign="top"> <tt>'\u0048'</tt> 733 * <td> The upper-case variant of {@code 'h'}. 734 * 735 * <tr><td valign="top"> {@code 's'} 736 * <td valign="top"> <tt>'\u0073'</tt> 737 * <td> Produces a string. 738 * 739 * <p> If the argument is {@code null}, then the result is 740 * "{@code null}". If the argument implements {@link Formattable}, then 741 * its {@link Formattable#formatTo formatTo} method is invoked. 742 * Otherwise, the result is obtained by invoking the argument's 743 * {@code toString()} method. 744 * 745 * <p> If the {@code '#'} flag is given and the argument is not a {@link 746 * Formattable} , then a {@link FormatFlagsConversionMismatchException} 747 * will be thrown. 748 * 749 * <tr><td valign="top"> {@code 'S'} 750 * <td valign="top"> <tt>'\u0053'</tt> 751 * <td> The upper-case variant of {@code 's'}. 752 * 753 * </table> 754 * 755 * <p> The following <a name="dFlags">flags</a> apply to general conversions: 756 * 757 * <table cellpadding=5 summary="dFlags"> 758 * 759 * <tr><td valign="top"> {@code '-'} 760 * <td valign="top"> <tt>'\u002d'</tt> 761 * <td> Left justifies the output. Spaces (<tt>'\u0020'</tt>) will be 762 * added at the end of the converted value as required to fill the minimum 763 * width of the field. If the width is not provided, then a {@link 764 * MissingFormatWidthException} will be thrown. If this flag is not given 765 * then the output will be right-justified. 766 * 767 * <tr><td valign="top"> {@code '#'} 768 * <td valign="top"> <tt>'\u0023'</tt> 769 * <td> Requires the output use an alternate form. The definition of the 770 * form is specified by the conversion. 771 * 772 * </table> 773 * 774 * <p> The <a name="genWidth">width</a> is the minimum number of characters to 775 * be written to the 776 * output. If the length of the converted value is less than the width then 777 * the output will be padded by <tt>' '</tt> (<tt>'\u0020'</tt>) 778 * until the total number of characters equals the width. The padding is on 779 * the left by default. If the {@code '-'} flag is given, then the padding 780 * will be on the right. If the width is not specified then there is no 781 * minimum. 782 * 783 * <p> The precision is the maximum number of characters to be written to the 784 * output. The precision is applied before the width, thus the output will be 785 * truncated to {@code precision} characters even if the width is greater than 786 * the precision. If the precision is not specified then there is no explicit 787 * limit on the number of characters. 788 * 789 * <h4><a name="dchar">Character</a></h4> 790 * 791 * This conversion may be applied to {@code char} and {@link Character}. It 792 * may also be applied to the types {@code byte}, {@link Byte}, 793 * {@code short}, and {@link Short}, {@code int} and {@link Integer} when 794 * {@link Character#isValidCodePoint} returns {@code true}. If it returns 795 * {@code false} then an {@link IllegalFormatCodePointException} will be 796 * thrown. 797 * 798 * <table cellpadding=5 summary="charConv"> 799 * 800 * <tr><td valign="top"> {@code 'c'} 801 * <td valign="top"> <tt>'\u0063'</tt> 802 * <td> Formats the argument as a Unicode character as described in <a 803 * href="../lang/Character.html#unicode">Unicode Character 804 * Representation</a>. This may be more than one 16-bit {@code char} in 805 * the case where the argument represents a supplementary character. 806 * 807 * <p> If the {@code '#'} flag is given, then a {@link 808 * FormatFlagsConversionMismatchException} will be thrown. 809 * 810 * <tr><td valign="top"> {@code 'C'} 811 * <td valign="top"> <tt>'\u0043'</tt> 812 * <td> The upper-case variant of {@code 'c'}. 813 * 814 * </table> 815 * 816 * <p> The {@code '-'} flag defined for <a href="#dFlags">General 817 * conversions</a> applies. If the {@code '#'} flag is given, then a {@link 818 * FormatFlagsConversionMismatchException} will be thrown. 819 * 820 * <p> The width is defined as for <a href="#genWidth">General conversions</a>. 821 * 822 * <p> The precision is not applicable. If the precision is specified then an 823 * {@link IllegalFormatPrecisionException} will be thrown. 824 * 825 * <h4><a name="dnum">Numeric</a></h4> 826 * 827 * <p> Numeric conversions are divided into the following categories: 828 * 829 * <ol> 830 * 831 * <li> <a href="#dnint"><b>Byte, Short, Integer, and Long</b></a> 832 * 833 * <li> <a href="#dnbint"><b>BigInteger</b></a> 834 * 835 * <li> <a href="#dndec"><b>Float and Double</b></a> 836 * 837 * <li> <a href="#dnbdec"><b>BigDecimal</b></a> 838 * 839 * </ol> 840 * 841 * <p> Numeric types will be formatted according to the following algorithm: 842 * 843 * <p><b><a name="L10nAlgorithm"> Number Localization Algorithm</a></b> 844 * 845 * <p> After digits are obtained for the integer part, fractional part, and 846 * exponent (as appropriate for the data type), the following transformation 847 * is applied: 848 * 849 * <ol> 850 * 851 * <li> Each digit character <i>d</i> in the string is replaced by a 852 * locale-specific digit computed relative to the current locale's 853 * {@linkplain java.text.DecimalFormatSymbols#getZeroDigit() zero digit} 854 * <i>z</i>; that is <i>d - </i> {@code '0'} 855 * <i> + z</i>. 856 * 857 * <li> If a decimal separator is present, a locale-specific {@linkplain 858 * java.text.DecimalFormatSymbols#getDecimalSeparator decimal separator} is 859 * substituted. 860 * 861 * <li> If the {@code ','} (<tt>'\u002c'</tt>) 862 * <a name="L10nGroup">flag</a> is given, then the locale-specific {@linkplain 863 * java.text.DecimalFormatSymbols#getGroupingSeparator grouping separator} is 864 * inserted by scanning the integer part of the string from least significant 865 * to most significant digits and inserting a separator at intervals defined by 866 * the locale's {@linkplain java.text.DecimalFormat#getGroupingSize() grouping 867 * size}. 868 * 869 * <li> If the {@code '0'} flag is given, then the locale-specific {@linkplain 870 * java.text.DecimalFormatSymbols#getZeroDigit() zero digits} are inserted 871 * after the sign character, if any, and before the first non-zero digit, until 872 * the length of the string is equal to the requested field width. 873 * 874 * <li> If the value is negative and the {@code '('} flag is given, then a 875 * {@code '('} (<tt>'\u0028'</tt>) is prepended and a {@code ')'} 876 * (<tt>'\u0029'</tt>) is appended. 877 * 878 * <li> If the value is negative (or floating-point negative zero) and 879 * {@code '('} flag is not given, then a {@code '-'} (<tt>'\u002d'</tt>) 880 * is prepended. 881 * 882 * <li> If the {@code '+'} flag is given and the value is positive or zero (or 883 * floating-point positive zero), then a {@code '+'} (<tt>'\u002b'</tt>) 884 * will be prepended. 885 * 886 * </ol> 887 * 888 * <p> If the value is NaN or positive infinity the literal strings "NaN" or 889 * "Infinity" respectively, will be output. If the value is negative infinity, 890 * then the output will be "(Infinity)" if the {@code '('} flag is given 891 * otherwise the output will be "-Infinity". These values are not localized. 892 * 893 * <p><a name="dnint"><b> Byte, Short, Integer, and Long </b></a> 894 * 895 * <p> The following conversions may be applied to {@code byte}, {@link Byte}, 896 * {@code short}, {@link Short}, {@code int} and {@link Integer}, 897 * {@code long}, and {@link Long}. 898 * 899 * <table cellpadding=5 summary="IntConv"> 900 * 901 * <tr><td valign="top"> {@code 'd'} 902 * <td valign="top"> <tt>'\u0064'</tt> 903 * <td> Formats the argument as a decimal integer. The <a 904 * href="#L10nAlgorithm">localization algorithm</a> is applied. 905 * 906 * <p> If the {@code '0'} flag is given and the value is negative, then 907 * the zero padding will occur after the sign. 908 * 909 * <p> If the {@code '#'} flag is given then a {@link 910 * FormatFlagsConversionMismatchException} will be thrown. 911 * 912 * <tr><td valign="top"> {@code 'o'} 913 * <td valign="top"> <tt>'\u006f'</tt> 914 * <td> Formats the argument as an integer in base eight. No localization 915 * is applied. 916 * 917 * <p> If <i>x</i> is negative then the result will be an unsigned value 918 * generated by adding 2<sup>n</sup> to the value where {@code n} is the 919 * number of bits in the type as returned by the static {@code SIZE} field 920 * in the {@linkplain Byte#SIZE Byte}, {@linkplain Short#SIZE Short}, 921 * {@linkplain Integer#SIZE Integer}, or {@linkplain Long#SIZE Long} 922 * classes as appropriate. 923 * 924 * <p> If the {@code '#'} flag is given then the output will always begin 925 * with the radix indicator {@code '0'}. 926 * 927 * <p> If the {@code '0'} flag is given then the output will be padded 928 * with leading zeros to the field width following any indication of sign. 929 * 930 * <p> If {@code '('}, {@code '+'}, ' ', or {@code ','} flags 931 * are given then a {@link FormatFlagsConversionMismatchException} will be 932 * thrown. 933 * 934 * <tr><td valign="top"> {@code 'x'} 935 * <td valign="top"> <tt>'\u0078'</tt> 936 * <td> Formats the argument as an integer in base sixteen. No 937 * localization is applied. 938 * 939 * <p> If <i>x</i> is negative then the result will be an unsigned value 940 * generated by adding 2<sup>n</sup> to the value where {@code n} is the 941 * number of bits in the type as returned by the static {@code SIZE} field 942 * in the {@linkplain Byte#SIZE Byte}, {@linkplain Short#SIZE Short}, 943 * {@linkplain Integer#SIZE Integer}, or {@linkplain Long#SIZE Long} 944 * classes as appropriate. 945 * 946 * <p> If the {@code '#'} flag is given then the output will always begin 947 * with the radix indicator {@code "0x"}. 948 * 949 * <p> If the {@code '0'} flag is given then the output will be padded to 950 * the field width with leading zeros after the radix indicator or sign (if 951 * present). 952 * 953 * <p> If {@code '('}, <tt>' '</tt>, {@code '+'}, or 954 * {@code ','} flags are given then a {@link 955 * FormatFlagsConversionMismatchException} will be thrown. 956 * 957 * <tr><td valign="top"> {@code 'X'} 958 * <td valign="top"> <tt>'\u0058'</tt> 959 * <td> The upper-case variant of {@code 'x'}. The entire string 960 * representing the number will be converted to {@linkplain 961 * String#toUpperCase upper case} including the {@code 'x'} (if any) and 962 * all hexadecimal digits {@code 'a'} - {@code 'f'} 963 * (<tt>'\u0061'</tt> - <tt>'\u0066'</tt>). 964 * 965 * </table> 966 * 967 * <p> If the conversion is {@code 'o'}, {@code 'x'}, or {@code 'X'} and 968 * both the {@code '#'} and the {@code '0'} flags are given, then result will 969 * contain the radix indicator ({@code '0'} for octal and {@code "0x"} or 970 * {@code "0X"} for hexadecimal), some number of zeros (based on the width), 971 * and the value. 972 * 973 * <p> If the {@code '-'} flag is not given, then the space padding will occur 974 * before the sign. 975 * 976 * <p> The following <a name="intFlags">flags</a> apply to numeric integral 977 * conversions: 978 * 979 * <table cellpadding=5 summary="intFlags"> 980 * 981 * <tr><td valign="top"> {@code '+'} 982 * <td valign="top"> <tt>'\u002b'</tt> 983 * <td> Requires the output to include a positive sign for all positive 984 * numbers. If this flag is not given then only negative values will 985 * include a sign. 986 * 987 * <p> If both the {@code '+'} and <tt>' '</tt> flags are given 988 * then an {@link IllegalFormatFlagsException} will be thrown. 989 * 990 * <tr><td valign="top"> <tt>' '</tt> 991 * <td valign="top"> <tt>'\u0020'</tt> 992 * <td> Requires the output to include a single extra space 993 * (<tt>'\u0020'</tt>) for non-negative values. 994 * 995 * <p> If both the {@code '+'} and <tt>' '</tt> flags are given 996 * then an {@link IllegalFormatFlagsException} will be thrown. 997 * 998 * <tr><td valign="top"> {@code '0'} 999 * <td valign="top"> <tt>'\u0030'</tt> 1000 * <td> Requires the output to be padded with leading {@linkplain 1001 * java.text.DecimalFormatSymbols#getZeroDigit zeros} to the minimum field 1002 * width following any sign or radix indicator except when converting NaN 1003 * or infinity. If the width is not provided, then a {@link 1004 * MissingFormatWidthException} will be thrown. 1005 * 1006 * <p> If both the {@code '-'} and {@code '0'} flags are given then an 1007 * {@link IllegalFormatFlagsException} will be thrown. 1008 * 1009 * <tr><td valign="top"> {@code ','} 1010 * <td valign="top"> <tt>'\u002c'</tt> 1011 * <td> Requires the output to include the locale-specific {@linkplain 1012 * java.text.DecimalFormatSymbols#getGroupingSeparator group separators} as 1013 * described in the <a href="#L10nGroup">"group" section</a> of the 1014 * localization algorithm. 1015 * 1016 * <tr><td valign="top"> {@code '('} 1017 * <td valign="top"> <tt>'\u0028'</tt> 1018 * <td> Requires the output to prepend a {@code '('} 1019 * (<tt>'\u0028'</tt>) and append a {@code ')'} 1020 * (<tt>'\u0029'</tt>) to negative values. 1021 * 1022 * </table> 1023 * 1024 * <p> If no <a name="intdFlags">flags</a> are given the default formatting is 1025 * as follows: 1026 * 1027 * <ul> 1028 * 1029 * <li> The output is right-justified within the {@code width} 1030 * 1031 * <li> Negative numbers begin with a {@code '-'} (<tt>'\u002d'</tt>) 1032 * 1033 * <li> Positive numbers and zero do not include a sign or extra leading 1034 * space 1035 * 1036 * <li> No grouping separators are included 1037 * 1038 * </ul> 1039 * 1040 * <p> The <a name="intWidth">width</a> is the minimum number of characters to 1041 * be written to the output. This includes any signs, digits, grouping 1042 * separators, radix indicator, and parentheses. If the length of the 1043 * converted value is less than the width then the output will be padded by 1044 * spaces (<tt>'\u0020'</tt>) until the total number of characters equals 1045 * width. The padding is on the left by default. If {@code '-'} flag is 1046 * given then the padding will be on the right. If width is not specified then 1047 * there is no minimum. 1048 * 1049 * <p> The precision is not applicable. If precision is specified then an 1050 * {@link IllegalFormatPrecisionException} will be thrown. 1051 * 1052 * <p><a name="dnbint"><b> BigInteger </b></a> 1053 * 1054 * <p> The following conversions may be applied to {@link 1055 * java.math.BigInteger}. 1056 * 1057 * <table cellpadding=5 summary="BIntConv"> 1058 * 1059 * <tr><td valign="top"> {@code 'd'} 1060 * <td valign="top"> <tt>'\u0064'</tt> 1061 * <td> Requires the output to be formatted as a decimal integer. The <a 1062 * href="#L10nAlgorithm">localization algorithm</a> is applied. 1063 * 1064 * <p> If the {@code '#'} flag is given {@link 1065 * FormatFlagsConversionMismatchException} will be thrown. 1066 * 1067 * <tr><td valign="top"> {@code 'o'} 1068 * <td valign="top"> <tt>'\u006f'</tt> 1069 * <td> Requires the output to be formatted as an integer in base eight. 1070 * No localization is applied. 1071 * 1072 * <p> If <i>x</i> is negative then the result will be a signed value 1073 * beginning with {@code '-'} (<tt>'\u002d'</tt>). Signed output is 1074 * allowed for this type because unlike the primitive types it is not 1075 * possible to create an unsigned equivalent without assuming an explicit 1076 * data-type size. 1077 * 1078 * <p> If <i>x</i> is positive or zero and the {@code '+'} flag is given 1079 * then the result will begin with {@code '+'} (<tt>'\u002b'</tt>). 1080 * 1081 * <p> If the {@code '#'} flag is given then the output will always begin 1082 * with {@code '0'} prefix. 1083 * 1084 * <p> If the {@code '0'} flag is given then the output will be padded 1085 * with leading zeros to the field width following any indication of sign. 1086 * 1087 * <p> If the {@code ','} flag is given then a {@link 1088 * FormatFlagsConversionMismatchException} will be thrown. 1089 * 1090 * <tr><td valign="top"> {@code 'x'} 1091 * <td valign="top"> <tt>'\u0078'</tt> 1092 * <td> Requires the output to be formatted as an integer in base 1093 * sixteen. No localization is applied. 1094 * 1095 * <p> If <i>x</i> is negative then the result will be a signed value 1096 * beginning with {@code '-'} (<tt>'\u002d'</tt>). Signed output is 1097 * allowed for this type because unlike the primitive types it is not 1098 * possible to create an unsigned equivalent without assuming an explicit 1099 * data-type size. 1100 * 1101 * <p> If <i>x</i> is positive or zero and the {@code '+'} flag is given 1102 * then the result will begin with {@code '+'} (<tt>'\u002b'</tt>). 1103 * 1104 * <p> If the {@code '#'} flag is given then the output will always begin 1105 * with the radix indicator {@code "0x"}. 1106 * 1107 * <p> If the {@code '0'} flag is given then the output will be padded to 1108 * the field width with leading zeros after the radix indicator or sign (if 1109 * present). 1110 * 1111 * <p> If the {@code ','} flag is given then a {@link 1112 * FormatFlagsConversionMismatchException} will be thrown. 1113 * 1114 * <tr><td valign="top"> {@code 'X'} 1115 * <td valign="top"> <tt>'\u0058'</tt> 1116 * <td> The upper-case variant of {@code 'x'}. The entire string 1117 * representing the number will be converted to {@linkplain 1118 * String#toUpperCase upper case} including the {@code 'x'} (if any) and 1119 * all hexadecimal digits {@code 'a'} - {@code 'f'} 1120 * (<tt>'\u0061'</tt> - <tt>'\u0066'</tt>). 1121 * 1122 * </table> 1123 * 1124 * <p> If the conversion is {@code 'o'}, {@code 'x'}, or {@code 'X'} and 1125 * both the {@code '#'} and the {@code '0'} flags are given, then result will 1126 * contain the base indicator ({@code '0'} for octal and {@code "0x"} or 1127 * {@code "0X"} for hexadecimal), some number of zeros (based on the width), 1128 * and the value. 1129 * 1130 * <p> If the {@code '0'} flag is given and the value is negative, then the 1131 * zero padding will occur after the sign. 1132 * 1133 * <p> If the {@code '-'} flag is not given, then the space padding will occur 1134 * before the sign. 1135 * 1136 * <p> All <a href="#intFlags">flags</a> defined for Byte, Short, Integer, and 1137 * Long apply. The <a href="#intdFlags">default behavior</a> when no flags are 1138 * given is the same as for Byte, Short, Integer, and Long. 1139 * 1140 * <p> The specification of <a href="#intWidth">width</a> is the same as 1141 * defined for Byte, Short, Integer, and Long. 1142 * 1143 * <p> The precision is not applicable. If precision is specified then an 1144 * {@link IllegalFormatPrecisionException} will be thrown. 1145 * 1146 * <p><a name="dndec"><b> Float and Double</b></a> 1147 * 1148 * <p> The following conversions may be applied to {@code float}, {@link 1149 * Float}, {@code double} and {@link Double}. 1150 * 1151 * <table cellpadding=5 summary="floatConv"> 1152 * 1153 * <tr><td valign="top"> {@code 'e'} 1154 * <td valign="top"> <tt>'\u0065'</tt> 1155 * <td> Requires the output to be formatted using <a 1156 * name="scientific">computerized scientific notation</a>. The <a 1157 * href="#L10nAlgorithm">localization algorithm</a> is applied. 1158 * 1159 * <p> The formatting of the magnitude <i>m</i> depends upon its value. 1160 * 1161 * <p> If <i>m</i> is NaN or infinite, the literal strings "NaN" or 1162 * "Infinity", respectively, will be output. These values are not 1163 * localized. 1164 * 1165 * <p> If <i>m</i> is positive-zero or negative-zero, then the exponent 1166 * will be {@code "+00"}. 1167 * 1168 * <p> Otherwise, the result is a string that represents the sign and 1169 * magnitude (absolute value) of the argument. The formatting of the sign 1170 * is described in the <a href="#L10nAlgorithm">localization 1171 * algorithm</a>. The formatting of the magnitude <i>m</i> depends upon its 1172 * value. 1173 * 1174 * <p> Let <i>n</i> be the unique integer such that 10<sup><i>n</i></sup> 1175 * <= <i>m</i> < 10<sup><i>n</i>+1</sup>; then let <i>a</i> be the 1176 * mathematically exact quotient of <i>m</i> and 10<sup><i>n</i></sup> so 1177 * that 1 <= <i>a</i> < 10. The magnitude is then represented as the 1178 * integer part of <i>a</i>, as a single decimal digit, followed by the 1179 * decimal separator followed by decimal digits representing the fractional 1180 * part of <i>a</i>, followed by the exponent symbol {@code 'e'} 1181 * (<tt>'\u0065'</tt>), followed by the sign of the exponent, followed 1182 * by a representation of <i>n</i> as a decimal integer, as produced by the 1183 * method {@link Long#toString(long, int)}, and zero-padded to include at 1184 * least two digits. 1185 * 1186 * <p> The number of digits in the result for the fractional part of 1187 * <i>m</i> or <i>a</i> is equal to the precision. If the precision is not 1188 * specified then the default value is {@code 6}. If the precision is less 1189 * than the number of digits which would appear after the decimal point in 1190 * the string returned by {@link Float#toString(float)} or {@link 1191 * Double#toString(double)} respectively, then the value will be rounded 1192 * using the {@linkplain java.math.BigDecimal#ROUND_HALF_UP round half up 1193 * algorithm}. Otherwise, zeros may be appended to reach the precision. 1194 * For a canonical representation of the value, use {@link 1195 * Float#toString(float)} or {@link Double#toString(double)} as 1196 * appropriate. 1197 * 1198 * <p>If the {@code ','} flag is given, then an {@link 1199 * FormatFlagsConversionMismatchException} will be thrown. 1200 * 1201 * <tr><td valign="top"> {@code 'E'} 1202 * <td valign="top"> <tt>'\u0045'</tt> 1203 * <td> The upper-case variant of {@code 'e'}. The exponent symbol 1204 * will be {@code 'E'} (<tt>'\u0045'</tt>). 1205 * 1206 * <tr><td valign="top"> {@code 'g'} 1207 * <td valign="top"> <tt>'\u0067'</tt> 1208 * <td> Requires the output to be formatted in general scientific notation 1209 * as described below. The <a href="#L10nAlgorithm">localization 1210 * algorithm</a> is applied. 1211 * 1212 * <p> After rounding for the precision, the formatting of the resulting 1213 * magnitude <i>m</i> depends on its value. 1214 * 1215 * <p> If <i>m</i> is greater than or equal to 10<sup>-4</sup> but less 1216 * than 10<sup>precision</sup> then it is represented in <i><a 1217 * href="#decimal">decimal format</a></i>. 1218 * 1219 * <p> If <i>m</i> is less than 10<sup>-4</sup> or greater than or equal to 1220 * 10<sup>precision</sup>, then it is represented in <i><a 1221 * href="#scientific">computerized scientific notation</a></i>. 1222 * 1223 * <p> The total number of significant digits in <i>m</i> is equal to the 1224 * precision. If the precision is not specified, then the default value is 1225 * {@code 6}. If the precision is {@code 0}, then it is taken to be 1226 * {@code 1}. 1227 * 1228 * <p> If the {@code '#'} flag is given then an {@link 1229 * FormatFlagsConversionMismatchException} will be thrown. 1230 * 1231 * <tr><td valign="top"> {@code 'G'} 1232 * <td valign="top"> <tt>'\u0047'</tt> 1233 * <td> The upper-case variant of {@code 'g'}. 1234 * 1235 * <tr><td valign="top"> {@code 'f'} 1236 * <td valign="top"> <tt>'\u0066'</tt> 1237 * <td> Requires the output to be formatted using <a name="decimal">decimal 1238 * format</a>. The <a href="#L10nAlgorithm">localization algorithm</a> is 1239 * applied. 1240 * 1241 * <p> The result is a string that represents the sign and magnitude 1242 * (absolute value) of the argument. The formatting of the sign is 1243 * described in the <a href="#L10nAlgorithm">localization 1244 * algorithm</a>. The formatting of the magnitude <i>m</i> depends upon its 1245 * value. 1246 * 1247 * <p> If <i>m</i> NaN or infinite, the literal strings "NaN" or 1248 * "Infinity", respectively, will be output. These values are not 1249 * localized. 1250 * 1251 * <p> The magnitude is formatted as the integer part of <i>m</i>, with no 1252 * leading zeroes, followed by the decimal separator followed by one or 1253 * more decimal digits representing the fractional part of <i>m</i>. 1254 * 1255 * <p> The number of digits in the result for the fractional part of 1256 * <i>m</i> or <i>a</i> is equal to the precision. If the precision is not 1257 * specified then the default value is {@code 6}. If the precision is less 1258 * than the number of digits which would appear after the decimal point in 1259 * the string returned by {@link Float#toString(float)} or {@link 1260 * Double#toString(double)} respectively, then the value will be rounded 1261 * using the {@linkplain java.math.BigDecimal#ROUND_HALF_UP round half up 1262 * algorithm}. Otherwise, zeros may be appended to reach the precision. 1263 * For a canonical representation of the value, use {@link 1264 * Float#toString(float)} or {@link Double#toString(double)} as 1265 * appropriate. 1266 * 1267 * <tr><td valign="top"> {@code 'a'} 1268 * <td valign="top"> <tt>'\u0061'</tt> 1269 * <td> Requires the output to be formatted in hexadecimal exponential 1270 * form. No localization is applied. 1271 * 1272 * <p> The result is a string that represents the sign and magnitude 1273 * (absolute value) of the argument <i>x</i>. 1274 * 1275 * <p> If <i>x</i> is negative or a negative-zero value then the result 1276 * will begin with {@code '-'} (<tt>'\u002d'</tt>). 1277 * 1278 * <p> If <i>x</i> is positive or a positive-zero value and the 1279 * {@code '+'} flag is given then the result will begin with {@code '+'} 1280 * (<tt>'\u002b'</tt>). 1281 * 1282 * <p> The formatting of the magnitude <i>m</i> depends upon its value. 1283 * 1284 * <ul> 1285 * 1286 * <li> If the value is NaN or infinite, the literal strings "NaN" or 1287 * "Infinity", respectively, will be output. 1288 * 1289 * <li> If <i>m</i> is zero then it is represented by the string 1290 * {@code "0x0.0p0"}. 1291 * 1292 * <li> If <i>m</i> is a {@code double} value with a normalized 1293 * representation then substrings are used to represent the significand and 1294 * exponent fields. The significand is represented by the characters 1295 * {@code "0x1."} followed by the hexadecimal representation of the rest 1296 * of the significand as a fraction. The exponent is represented by 1297 * {@code 'p'} (<tt>'\u0070'</tt>) followed by a decimal string of the 1298 * unbiased exponent as if produced by invoking {@link 1299 * Integer#toString(int) Integer.toString} on the exponent value. If the 1300 * precision is specified, the value is rounded to the given number of 1301 * hexadecimal digits. 1302 * 1303 * <li> If <i>m</i> is a {@code double} value with a subnormal 1304 * representation then, unless the precision is specified to be in the range 1305 * 1 through 12, inclusive, the significand is represented by the characters 1306 * {@code '0x0.'} followed by the hexadecimal representation of the rest of 1307 * the significand as a fraction, and the exponent represented by 1308 * {@code 'p-1022'}. If the precision is in the interval 1309 * [1, 12], the subnormal value is normalized such that it 1310 * begins with the characters {@code '0x1.'}, rounded to the number of 1311 * hexadecimal digits of precision, and the exponent adjusted 1312 * accordingly. Note that there must be at least one nonzero digit in a 1313 * subnormal significand. 1314 * 1315 * </ul> 1316 * 1317 * <p> If the {@code '('} or {@code ','} flags are given, then a {@link 1318 * FormatFlagsConversionMismatchException} will be thrown. 1319 * 1320 * <tr><td valign="top"> {@code 'A'} 1321 * <td valign="top"> <tt>'\u0041'</tt> 1322 * <td> The upper-case variant of {@code 'a'}. The entire string 1323 * representing the number will be converted to upper case including the 1324 * {@code 'x'} (<tt>'\u0078'</tt>) and {@code 'p'} 1325 * (<tt>'\u0070'</tt> and all hexadecimal digits {@code 'a'} - 1326 * {@code 'f'} (<tt>'\u0061'</tt> - <tt>'\u0066'</tt>). 1327 * 1328 * </table> 1329 * 1330 * <p> All <a href="#intFlags">flags</a> defined for Byte, Short, Integer, and 1331 * Long apply. 1332 * 1333 * <p> If the {@code '#'} flag is given, then the decimal separator will 1334 * always be present. 1335 * 1336 * <p> If no <a name="floatdFlags">flags</a> are given the default formatting 1337 * is as follows: 1338 * 1339 * <ul> 1340 * 1341 * <li> The output is right-justified within the {@code width} 1342 * 1343 * <li> Negative numbers begin with a {@code '-'} 1344 * 1345 * <li> Positive numbers and positive zero do not include a sign or extra 1346 * leading space 1347 * 1348 * <li> No grouping separators are included 1349 * 1350 * <li> The decimal separator will only appear if a digit follows it 1351 * 1352 * </ul> 1353 * 1354 * <p> The <a name="floatDWidth">width</a> is the minimum number of characters 1355 * to be written to the output. This includes any signs, digits, grouping 1356 * separators, decimal separators, exponential symbol, radix indicator, 1357 * parentheses, and strings representing infinity and NaN as applicable. If 1358 * the length of the converted value is less than the width then the output 1359 * will be padded by spaces (<tt>'\u0020'</tt>) until the total number of 1360 * characters equals width. The padding is on the left by default. If the 1361 * {@code '-'} flag is given then the padding will be on the right. If width 1362 * is not specified then there is no minimum. 1363 * 1364 * <p> If the <a name="floatDPrec">conversion</a> is {@code 'e'}, 1365 * {@code 'E'} or {@code 'f'}, then the precision is the number of digits 1366 * after the decimal separator. If the precision is not specified, then it is 1367 * assumed to be {@code 6}. 1368 * 1369 * <p> If the conversion is {@code 'g'} or {@code 'G'}, then the precision is 1370 * the total number of significant digits in the resulting magnitude after 1371 * rounding. If the precision is not specified, then the default value is 1372 * {@code 6}. If the precision is {@code 0}, then it is taken to be 1373 * {@code 1}. 1374 * 1375 * <p> If the conversion is {@code 'a'} or {@code 'A'}, then the precision 1376 * is the number of hexadecimal digits after the radix point. If the 1377 * precision is not provided, then all of the digits as returned by {@link 1378 * Double#toHexString(double)} will be output. 1379 * 1380 * <p><a name="dnbdec"><b> BigDecimal </b></a> 1381 * 1382 * <p> The following conversions may be applied {@link java.math.BigDecimal 1383 * BigDecimal}. 1384 * 1385 * <table cellpadding=5 summary="floatConv"> 1386 * 1387 * <tr><td valign="top"> {@code 'e'} 1388 * <td valign="top"> <tt>'\u0065'</tt> 1389 * <td> Requires the output to be formatted using <a 1390 * name="bscientific">computerized scientific notation</a>. The <a 1391 * href="#L10nAlgorithm">localization algorithm</a> is applied. 1392 * 1393 * <p> The formatting of the magnitude <i>m</i> depends upon its value. 1394 * 1395 * <p> If <i>m</i> is positive-zero or negative-zero, then the exponent 1396 * will be {@code "+00"}. 1397 * 1398 * <p> Otherwise, the result is a string that represents the sign and 1399 * magnitude (absolute value) of the argument. The formatting of the sign 1400 * is described in the <a href="#L10nAlgorithm">localization 1401 * algorithm</a>. The formatting of the magnitude <i>m</i> depends upon its 1402 * value. 1403 * 1404 * <p> Let <i>n</i> be the unique integer such that 10<sup><i>n</i></sup> 1405 * <= <i>m</i> < 10<sup><i>n</i>+1</sup>; then let <i>a</i> be the 1406 * mathematically exact quotient of <i>m</i> and 10<sup><i>n</i></sup> so 1407 * that 1 <= <i>a</i> < 10. The magnitude is then represented as the 1408 * integer part of <i>a</i>, as a single decimal digit, followed by the 1409 * decimal separator followed by decimal digits representing the fractional 1410 * part of <i>a</i>, followed by the exponent symbol {@code 'e'} 1411 * (<tt>'\u0065'</tt>), followed by the sign of the exponent, followed 1412 * by a representation of <i>n</i> as a decimal integer, as produced by the 1413 * method {@link Long#toString(long, int)}, and zero-padded to include at 1414 * least two digits. 1415 * 1416 * <p> The number of digits in the result for the fractional part of 1417 * <i>m</i> or <i>a</i> is equal to the precision. If the precision is not 1418 * specified then the default value is {@code 6}. If the precision is 1419 * less than the number of digits to the right of the decimal point then 1420 * the value will be rounded using the 1421 * {@linkplain java.math.BigDecimal#ROUND_HALF_UP round half up 1422 * algorithm}. Otherwise, zeros may be appended to reach the precision. 1423 * For a canonical representation of the value, use {@link 1424 * BigDecimal#toString()}. 1425 * 1426 * <p> If the {@code ','} flag is given, then an {@link 1427 * FormatFlagsConversionMismatchException} will be thrown. 1428 * 1429 * <tr><td valign="top"> {@code 'E'} 1430 * <td valign="top"> <tt>'\u0045'</tt> 1431 * <td> The upper-case variant of {@code 'e'}. The exponent symbol 1432 * will be {@code 'E'} (<tt>'\u0045'</tt>). 1433 * 1434 * <tr><td valign="top"> {@code 'g'} 1435 * <td valign="top"> <tt>'\u0067'</tt> 1436 * <td> Requires the output to be formatted in general scientific notation 1437 * as described below. The <a href="#L10nAlgorithm">localization 1438 * algorithm</a> is applied. 1439 * 1440 * <p> After rounding for the precision, the formatting of the resulting 1441 * magnitude <i>m</i> depends on its value. 1442 * 1443 * <p> If <i>m</i> is greater than or equal to 10<sup>-4</sup> but less 1444 * than 10<sup>precision</sup> then it is represented in <i><a 1445 * href="#bdecimal">decimal format</a></i>. 1446 * 1447 * <p> If <i>m</i> is less than 10<sup>-4</sup> or greater than or equal to 1448 * 10<sup>precision</sup>, then it is represented in <i><a 1449 * href="#bscientific">computerized scientific notation</a></i>. 1450 * 1451 * <p> The total number of significant digits in <i>m</i> is equal to the 1452 * precision. If the precision is not specified, then the default value is 1453 * {@code 6}. If the precision is {@code 0}, then it is taken to be 1454 * {@code 1}. 1455 * 1456 * <p> If the {@code '#'} flag is given then an {@link 1457 * FormatFlagsConversionMismatchException} will be thrown. 1458 * 1459 * <tr><td valign="top"> {@code 'G'} 1460 * <td valign="top"> <tt>'\u0047'</tt> 1461 * <td> The upper-case variant of {@code 'g'}. 1462 * 1463 * <tr><td valign="top"> {@code 'f'} 1464 * <td valign="top"> <tt>'\u0066'</tt> 1465 * <td> Requires the output to be formatted using <a name="bdecimal">decimal 1466 * format</a>. The <a href="#L10nAlgorithm">localization algorithm</a> is 1467 * applied. 1468 * 1469 * <p> The result is a string that represents the sign and magnitude 1470 * (absolute value) of the argument. The formatting of the sign is 1471 * described in the <a href="#L10nAlgorithm">localization 1472 * algorithm</a>. The formatting of the magnitude <i>m</i> depends upon its 1473 * value. 1474 * 1475 * <p> The magnitude is formatted as the integer part of <i>m</i>, with no 1476 * leading zeroes, followed by the decimal separator followed by one or 1477 * more decimal digits representing the fractional part of <i>m</i>. 1478 * 1479 * <p> The number of digits in the result for the fractional part of 1480 * <i>m</i> or <i>a</i> is equal to the precision. If the precision is not 1481 * specified then the default value is {@code 6}. If the precision is 1482 * less than the number of digits to the right of the decimal point 1483 * then the value will be rounded using the 1484 * {@linkplain java.math.BigDecimal#ROUND_HALF_UP round half up 1485 * algorithm}. Otherwise, zeros may be appended to reach the precision. 1486 * For a canonical representation of the value, use {@link 1487 * BigDecimal#toString()}. 1488 * 1489 * </table> 1490 * 1491 * <p> All <a href="#intFlags">flags</a> defined for Byte, Short, Integer, and 1492 * Long apply. 1493 * 1494 * <p> If the {@code '#'} flag is given, then the decimal separator will 1495 * always be present. 1496 * 1497 * <p> The <a href="#floatdFlags">default behavior</a> when no flags are 1498 * given is the same as for Float and Double. 1499 * 1500 * <p> The specification of <a href="#floatDWidth">width</a> and <a 1501 * href="#floatDPrec">precision</a> is the same as defined for Float and 1502 * Double. 1503 * 1504 * <h4><a name="ddt">Date/Time</a></h4> 1505 * 1506 * <p> This conversion may be applied to {@code long}, {@link Long}, {@link 1507 * Calendar}, {@link Date} and {@link TemporalAccessor TemporalAccessor} 1508 * 1509 * <table cellpadding=5 summary="DTConv"> 1510 * 1511 * <tr><td valign="top"> {@code 't'} 1512 * <td valign="top"> <tt>'\u0074'</tt> 1513 * <td> Prefix for date and time conversion characters. 1514 * <tr><td valign="top"> {@code 'T'} 1515 * <td valign="top"> <tt>'\u0054'</tt> 1516 * <td> The upper-case variant of {@code 't'}. 1517 * 1518 * </table> 1519 * 1520 * <p> The following date and time conversion character suffixes are defined 1521 * for the {@code 't'} and {@code 'T'} conversions. The types are similar to 1522 * but not completely identical to those defined by GNU {@code date} and 1523 * POSIX {@code strftime(3c)}. Additional conversion types are provided to 1524 * access Java-specific functionality (e.g. {@code 'L'} for milliseconds 1525 * within the second). 1526 * 1527 * <p> The following conversion characters are used for formatting times: 1528 * 1529 * <table cellpadding=5 summary="time"> 1530 * 1531 * <tr><td valign="top"> {@code 'H'} 1532 * <td valign="top"> <tt>'\u0048'</tt> 1533 * <td> Hour of the day for the 24-hour clock, formatted as two digits with 1534 * a leading zero as necessary i.e. {@code 00 - 23}. {@code 00} 1535 * corresponds to midnight. 1536 * 1537 * <tr><td valign="top">{@code 'I'} 1538 * <td valign="top"> <tt>'\u0049'</tt> 1539 * <td> Hour for the 12-hour clock, formatted as two digits with a leading 1540 * zero as necessary, i.e. {@code 01 - 12}. {@code 01} corresponds to 1541 * one o'clock (either morning or afternoon). 1542 * 1543 * <tr><td valign="top">{@code 'k'} 1544 * <td valign="top"> <tt>'\u006b'</tt> 1545 * <td> Hour of the day for the 24-hour clock, i.e. {@code 0 - 23}. 1546 * {@code 0} corresponds to midnight. 1547 * 1548 * <tr><td valign="top">{@code 'l'} 1549 * <td valign="top"> <tt>'\u006c'</tt> 1550 * <td> Hour for the 12-hour clock, i.e. {@code 1 - 12}. {@code 1} 1551 * corresponds to one o'clock (either morning or afternoon). 1552 * 1553 * <tr><td valign="top">{@code 'M'} 1554 * <td valign="top"> <tt>'\u004d'</tt> 1555 * <td> Minute within the hour formatted as two digits with a leading zero 1556 * as necessary, i.e. {@code 00 - 59}. 1557 * 1558 * <tr><td valign="top">{@code 'S'} 1559 * <td valign="top"> <tt>'\u0053'</tt> 1560 * <td> Seconds within the minute, formatted as two digits with a leading 1561 * zero as necessary, i.e. {@code 00 - 60} ("{@code 60}" is a special 1562 * value required to support leap seconds). 1563 * 1564 * <tr><td valign="top">{@code 'L'} 1565 * <td valign="top"> <tt>'\u004c'</tt> 1566 * <td> Millisecond within the second formatted as three digits with 1567 * leading zeros as necessary, i.e. {@code 000 - 999}. 1568 * 1569 * <tr><td valign="top">{@code 'N'} 1570 * <td valign="top"> <tt>'\u004e'</tt> 1571 * <td> Nanosecond within the second, formatted as nine digits with leading 1572 * zeros as necessary, i.e. {@code 000000000 - 999999999}. The precision 1573 * of this value is limited by the resolution of the underlying operating 1574 * system or hardware. 1575 * 1576 * <tr><td valign="top">{@code 'p'} 1577 * <td valign="top"> <tt>'\u0070'</tt> 1578 * <td> Locale-specific {@linkplain 1579 * java.text.DateFormatSymbols#getAmPmStrings morning or afternoon} marker 1580 * in lower case, e.g."{@code am}" or "{@code pm}". Use of the 1581 * conversion prefix {@code 'T'} forces this output to upper case. (Note 1582 * that {@code 'p'} produces lower-case output. This is different from 1583 * GNU {@code date} and POSIX {@code strftime(3c)} which produce 1584 * upper-case output.) 1585 * 1586 * <tr><td valign="top">{@code 'z'} 1587 * <td valign="top"> <tt>'\u007a'</tt> 1588 * <td> <a href="http://www.ietf.org/rfc/rfc0822.txt">RFC 822</a> 1589 * style numeric time zone offset from GMT, e.g. {@code -0800}. This 1590 * value will be adjusted as necessary for Daylight Saving Time. For 1591 * {@code long}, {@link Long}, and {@link Date} the time zone used is 1592 * the {@linkplain TimeZone#getDefault() default time zone} for this 1593 * instance of the Java virtual machine. 1594 * 1595 * <tr><td valign="top">{@code 'Z'} 1596 * <td valign="top"> <tt>'\u005a'</tt> 1597 * <td> A string representing the abbreviation for the time zone. This 1598 * value will be adjusted as necessary for Daylight Saving Time. For 1599 * {@code long}, {@link Long}, and {@link Date} the time zone used is 1600 * the {@linkplain TimeZone#getDefault() default time zone} for this 1601 * instance of the Java virtual machine. The Formatter's locale will 1602 * supersede the locale of the argument (if any). 1603 * 1604 * <tr><td valign="top">{@code 's'} 1605 * <td valign="top"> <tt>'\u0073'</tt> 1606 * <td> Seconds since the beginning of the epoch starting at 1 January 1970 1607 * {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE/1000} to 1608 * {@code Long.MAX_VALUE/1000}. 1609 * 1610 * <tr><td valign="top">{@code 'Q'} 1611 * <td valign="top"> <tt>'\u004f'</tt> 1612 * <td> Milliseconds since the beginning of the epoch starting at 1 January 1613 * 1970 {@code 00:00:00} UTC, i.e. {@code Long.MIN_VALUE} to 1614 * {@code Long.MAX_VALUE}. The precision of this value is limited by 1615 * the resolution of the underlying operating system or hardware. 1616 * 1617 * </table> 1618 * 1619 * <p> The following conversion characters are used for formatting dates: 1620 * 1621 * <table cellpadding=5 summary="date"> 1622 * 1623 * <tr><td valign="top">{@code 'B'} 1624 * <td valign="top"> <tt>'\u0042'</tt> 1625 * <td> Locale-specific {@linkplain java.text.DateFormatSymbols#getMonths 1626 * full month name}, e.g. {@code "January"}, {@code "February"}. 1627 * 1628 * <tr><td valign="top">{@code 'b'} 1629 * <td valign="top"> <tt>'\u0062'</tt> 1630 * <td> Locale-specific {@linkplain 1631 * java.text.DateFormatSymbols#getShortMonths abbreviated month name}, 1632 * e.g. {@code "Jan"}, {@code "Feb"}. 1633 * 1634 * <tr><td valign="top">{@code 'h'} 1635 * <td valign="top"> <tt>'\u0068'</tt> 1636 * <td> Same as {@code 'b'}. 1637 * 1638 * <tr><td valign="top">{@code 'A'} 1639 * <td valign="top"> <tt>'\u0041'</tt> 1640 * <td> Locale-specific full name of the {@linkplain 1641 * java.text.DateFormatSymbols#getWeekdays day of the week}, 1642 * e.g. {@code "Sunday"}, {@code "Monday"} 1643 * 1644 * <tr><td valign="top">{@code 'a'} 1645 * <td valign="top"> <tt>'\u0061'</tt> 1646 * <td> Locale-specific short name of the {@linkplain 1647 * java.text.DateFormatSymbols#getShortWeekdays day of the week}, 1648 * e.g. {@code "Sun"}, {@code "Mon"} 1649 * 1650 * <tr><td valign="top">{@code 'C'} 1651 * <td valign="top"> <tt>'\u0043'</tt> 1652 * <td> Four-digit year divided by {@code 100}, formatted as two digits 1653 * with leading zero as necessary, i.e. {@code 00 - 99} 1654 * 1655 * <tr><td valign="top">{@code 'Y'} 1656 * <td valign="top"> <tt>'\u0059'</tt> <td> Year, formatted to at least 1657 * four digits with leading zeros as necessary, e.g. {@code 0092} equals 1658 * {@code 92} CE for the Gregorian calendar. 1659 * 1660 * <tr><td valign="top">{@code 'y'} 1661 * <td valign="top"> <tt>'\u0079'</tt> 1662 * <td> Last two digits of the year, formatted with leading zeros as 1663 * necessary, i.e. {@code 00 - 99}. 1664 * 1665 * <tr><td valign="top">{@code 'j'} 1666 * <td valign="top"> <tt>'\u006a'</tt> 1667 * <td> Day of year, formatted as three digits with leading zeros as 1668 * necessary, e.g. {@code 001 - 366} for the Gregorian calendar. 1669 * {@code 001} corresponds to the first day of the year. 1670 * 1671 * <tr><td valign="top">{@code 'm'} 1672 * <td valign="top"> <tt>'\u006d'</tt> 1673 * <td> Month, formatted as two digits with leading zeros as necessary, 1674 * i.e. {@code 01 - 13}, where "{@code 01}" is the first month of the 1675 * year and ("{@code 13}" is a special value required to support lunar 1676 * calendars). 1677 * 1678 * <tr><td valign="top">{@code 'd'} 1679 * <td valign="top"> <tt>'\u0064'</tt> 1680 * <td> Day of month, formatted as two digits with leading zeros as 1681 * necessary, i.e. {@code 01 - 31}, where "{@code 01}" is the first day 1682 * of the month. 1683 * 1684 * <tr><td valign="top">{@code 'e'} 1685 * <td valign="top"> <tt>'\u0065'</tt> 1686 * <td> Day of month, formatted as two digits, i.e. {@code 1 - 31} where 1687 * "{@code 1}" is the first day of the month. 1688 * 1689 * </table> 1690 * 1691 * <p> The following conversion characters are used for formatting common 1692 * date/time compositions. 1693 * 1694 * <table cellpadding=5 summary="composites"> 1695 * 1696 * <tr><td valign="top">{@code 'R'} 1697 * <td valign="top"> <tt>'\u0052'</tt> 1698 * <td> Time formatted for the 24-hour clock as {@code "%tH:%tM"} 1699 * 1700 * <tr><td valign="top">{@code 'T'} 1701 * <td valign="top"> <tt>'\u0054'</tt> 1702 * <td> Time formatted for the 24-hour clock as {@code "%tH:%tM:%tS"}. 1703 * 1704 * <tr><td valign="top">{@code 'r'} 1705 * <td valign="top"> <tt>'\u0072'</tt> 1706 * <td> Time formatted for the 12-hour clock as {@code "%tI:%tM:%tS 1707 * %Tp"}. The location of the morning or afternoon marker 1708 * ({@code '%Tp'}) may be locale-dependent. 1709 * 1710 * <tr><td valign="top">{@code 'D'} 1711 * <td valign="top"> <tt>'\u0044'</tt> 1712 * <td> Date formatted as {@code "%tm/%td/%ty"}. 1713 * 1714 * <tr><td valign="top">{@code 'F'} 1715 * <td valign="top"> <tt>'\u0046'</tt> 1716 * <td> <a href="http://www.w3.org/TR/NOTE-datetime">ISO 8601</a> 1717 * complete date formatted as {@code "%tY-%tm-%td"}. 1718 * 1719 * <tr><td valign="top">{@code 'c'} 1720 * <td valign="top"> <tt>'\u0063'</tt> 1721 * <td> Date and time formatted as {@code "%ta %tb %td %tT %tZ %tY"}, 1722 * e.g. {@code "Sun Jul 20 16:17:00 EDT 1969"}. 1723 * 1724 * </table> 1725 * 1726 * <p> The {@code '-'} flag defined for <a href="#dFlags">General 1727 * conversions</a> applies. If the {@code '#'} flag is given, then a {@link 1728 * FormatFlagsConversionMismatchException} will be thrown. 1729 * 1730 * <p> The width is the minimum number of characters to 1731 * be written to the output. If the length of the converted value is less than 1732 * the {@code width} then the output will be padded by spaces 1733 * (<tt>'\u0020'</tt>) until the total number of characters equals width. 1734 * The padding is on the left by default. If the {@code '-'} flag is given 1735 * then the padding will be on the right. If width is not specified then there 1736 * is no minimum. 1737 * 1738 * <p> The precision is not applicable. If the precision is specified then an 1739 * {@link IllegalFormatPrecisionException} will be thrown. 1740 * 1741 * <h4><a name="dper">Percent</a></h4> 1742 * 1743 * <p> The conversion does not correspond to any argument. 1744 * 1745 * <table cellpadding=5 summary="DTConv"> 1746 * 1747 * <tr><td valign="top">{@code '%'} 1748 * <td> The result is a literal {@code '%'} (<tt>'\u0025'</tt>) 1749 * 1750 * <p> The width is the minimum number of characters to 1751 * be written to the output including the {@code '%'}. If the length of the 1752 * converted value is less than the {@code width} then the output will be 1753 * padded by spaces (<tt>'\u0020'</tt>) until the total number of 1754 * characters equals width. The padding is on the left. If width is not 1755 * specified then just the {@code '%'} is output. 1756 * 1757 * <p> The {@code '-'} flag defined for <a href="#dFlags">General 1758 * conversions</a> applies. If any other flags are provided, then a 1759 * {@link FormatFlagsConversionMismatchException} will be thrown. 1760 * 1761 * <p> The precision is not applicable. If the precision is specified an 1762 * {@link IllegalFormatPrecisionException} will be thrown. 1763 * 1764 * </table> 1765 * 1766 * <h4><a name="dls">Line Separator</a></h4> 1767 * 1768 * <p> The conversion does not correspond to any argument. 1769 * 1770 * <table cellpadding=5 summary="DTConv"> 1771 * 1772 * <tr><td valign="top">{@code 'n'} 1773 * <td> the platform-specific line separator as returned by {@link 1774 * System#getProperty System.getProperty("line.separator")}. 1775 * 1776 * </table> 1777 * 1778 * <p> Flags, width, and precision are not applicable. If any are provided an 1779 * {@link IllegalFormatFlagsException}, {@link IllegalFormatWidthException}, 1780 * and {@link IllegalFormatPrecisionException}, respectively will be thrown. 1781 * 1782 * <h4><a name="dpos">Argument Index</a></h4> 1783 * 1784 * <p> Format specifiers can reference arguments in three ways: 1785 * 1786 * <ul> 1787 * 1788 * <li> <i>Explicit indexing</i> is used when the format specifier contains an 1789 * argument index. The argument index is a decimal integer indicating the 1790 * position of the argument in the argument list. The first argument is 1791 * referenced by "{@code 1$}", the second by "{@code 2$}", etc. An argument 1792 * may be referenced more than once. 1793 * 1794 * <p> For example: 1795 * 1796 * <blockquote><pre> 1797 * formatter.format("%4$s %3$s %2$s %1$s %4$s %3$s %2$s %1$s", 1798 * "a", "b", "c", "d") 1799 * // -> "d c b a d c b a" 1800 * </pre></blockquote> 1801 * 1802 * <li> <i>Relative indexing</i> is used when the format specifier contains a 1803 * {@code '<'} (<tt>'\u003c'</tt>) flag which causes the argument for 1804 * the previous format specifier to be re-used. If there is no previous 1805 * argument, then a {@link MissingFormatArgumentException} is thrown. 1806 * 1807 * <blockquote><pre> 1808 * formatter.format("%s %s %<s %<s", "a", "b", "c", "d") 1809 * // -> "a b b b" 1810 * // "c" and "d" are ignored because they are not referenced 1811 * </pre></blockquote> 1812 * 1813 * <li> <i>Ordinary indexing</i> is used when the format specifier contains 1814 * neither an argument index nor a {@code '<'} flag. Each format specifier 1815 * which uses ordinary indexing is assigned a sequential implicit index into 1816 * argument list which is independent of the indices used by explicit or 1817 * relative indexing. 1818 * 1819 * <blockquote><pre> 1820 * formatter.format("%s %s %s %s", "a", "b", "c", "d") 1821 * // -> "a b c d" 1822 * </pre></blockquote> 1823 * 1824 * </ul> 1825 * 1826 * <p> It is possible to have a format string which uses all forms of indexing, 1827 * for example: 1828 * 1829 * <blockquote><pre> 1830 * formatter.format("%2$s %s %<s %s", "a", "b", "c", "d") 1831 * // -> "b a a b" 1832 * // "c" and "d" are ignored because they are not referenced 1833 * </pre></blockquote> 1834 * 1835 * <p> The maximum number of arguments is limited by the maximum dimension of a 1836 * Java array as defined by 1837 * <cite>The Java™ Virtual Machine Specification</cite>. 1838 * If the argument index is does not correspond to an 1839 * available argument, then a {@link MissingFormatArgumentException} is thrown. 1840 * 1841 * <p> If there are more arguments than format specifiers, the extra arguments 1842 * are ignored. 1843 * 1844 * <p> Unless otherwise specified, passing a {@code null} argument to any 1845 * method or constructor in this class will cause a {@link 1846 * NullPointerException} to be thrown. 1847 * 1848 * @author Iris Clark 1849 * @since 1.5 1850 */ 1851 public final class Formatter implements Closeable, Flushable { 1852 private Appendable a; 1853 private final Locale l; 1854 1855 private IOException lastException; 1856 1857 private final char zero; 1858 private static double scaleUp; 1859 1860 // 1 (sign) + 19 (max # sig digits) + 1 ('.') + 1 ('e') + 1 (sign) 1861 // + 3 (max # exp digits) + 4 (error) = 30 1862 private static final int MAX_FD_CHARS = 30; 1863 1864 /** 1865 * Returns a charset object for the given charset name. 1866 * @throws NullPointerException is csn is null 1867 * @throws UnsupportedEncodingException if the charset is not supported 1868 */ 1869 private static Charset toCharset(String csn) 1870 throws UnsupportedEncodingException 1871 { 1872 Objects.requireNonNull(csn, "charsetName"); 1873 try { 1874 return Charset.forName(csn); 1875 } catch (IllegalCharsetNameException|UnsupportedCharsetException unused) { 1876 // UnsupportedEncodingException should be thrown 1877 throw new UnsupportedEncodingException(csn); 1878 } 1879 } 1880 1881 private static final Appendable nonNullAppendable(Appendable a) { 1882 if (a == null) 1883 return new StringBuilder(); 1884 1885 return a; 1886 } 1887 1888 /* Private constructors */ 1889 private Formatter(Locale l, Appendable a) { 1890 this.a = a; 1891 this.l = l; 1892 this.zero = getZero(l); 1893 } 1894 1895 private Formatter(Charset charset, Locale l, File file) 1896 throws FileNotFoundException 1897 { 1898 this(l, 1899 new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), charset))); 1900 } 1901 1902 /** 1903 * Constructs a new formatter. 1904 * 1905 * <p> The destination of the formatted output is a {@link StringBuilder} 1906 * which may be retrieved by invoking {@link #out out()} and whose 1907 * current content may be converted into a string by invoking {@link 1908 * #toString toString()}. The locale used is the {@linkplain 1909 * Locale#getDefault(Locale.Category) default locale} for 1910 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 1911 * virtual machine. 1912 */ 1913 public Formatter() { 1914 this(Locale.getDefault(Locale.Category.FORMAT), new StringBuilder()); 1915 } 1916 1917 /** 1918 * Constructs a new formatter with the specified destination. 1919 * 1920 * <p> The locale used is the {@linkplain 1921 * Locale#getDefault(Locale.Category) default locale} for 1922 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 1923 * virtual machine. 1924 * 1925 * @param a 1926 * Destination for the formatted output. If {@code a} is 1927 * {@code null} then a {@link StringBuilder} will be created. 1928 */ 1929 public Formatter(Appendable a) { 1930 this(Locale.getDefault(Locale.Category.FORMAT), nonNullAppendable(a)); 1931 } 1932 1933 /** 1934 * Constructs a new formatter with the specified locale. 1935 * 1936 * <p> The destination of the formatted output is a {@link StringBuilder} 1937 * which may be retrieved by invoking {@link #out out()} and whose current 1938 * content may be converted into a string by invoking {@link #toString 1939 * toString()}. 1940 * 1941 * @param l 1942 * The {@linkplain java.util.Locale locale} to apply during 1943 * formatting. If {@code l} is {@code null} then no localization 1944 * is applied. 1945 */ 1946 public Formatter(Locale l) { 1947 this(l, new StringBuilder()); 1948 } 1949 1950 /** 1951 * Constructs a new formatter with the specified destination and locale. 1952 * 1953 * @param a 1954 * Destination for the formatted output. If {@code a} is 1955 * {@code null} then a {@link StringBuilder} will be created. 1956 * 1957 * @param l 1958 * The {@linkplain java.util.Locale locale} to apply during 1959 * formatting. If {@code l} is {@code null} then no localization 1960 * is applied. 1961 */ 1962 public Formatter(Appendable a, Locale l) { 1963 this(l, nonNullAppendable(a)); 1964 } 1965 1966 /** 1967 * Constructs a new formatter with the specified file name. 1968 * 1969 * <p> The charset used is the {@linkplain 1970 * java.nio.charset.Charset#defaultCharset() default charset} for this 1971 * instance of the Java virtual machine. 1972 * 1973 * <p> The locale used is the {@linkplain 1974 * Locale#getDefault(Locale.Category) default locale} for 1975 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 1976 * virtual machine. 1977 * 1978 * @param fileName 1979 * The name of the file to use as the destination of this 1980 * formatter. If the file exists then it will be truncated to 1981 * zero size; otherwise, a new file will be created. The output 1982 * will be written to the file and is buffered. 1983 * 1984 * @throws SecurityException 1985 * If a security manager is present and {@link 1986 * SecurityManager#checkWrite checkWrite(fileName)} denies write 1987 * access to the file 1988 * 1989 * @throws FileNotFoundException 1990 * If the given file name does not denote an existing, writable 1991 * regular file and a new regular file of that name cannot be 1992 * created, or if some other error occurs while opening or 1993 * creating the file 1994 */ 1995 public Formatter(String fileName) throws FileNotFoundException { 1996 this(Locale.getDefault(Locale.Category.FORMAT), 1997 new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName)))); 1998 } 1999 2000 /** 2001 * Constructs a new formatter with the specified file name and charset. 2002 * 2003 * <p> The locale used is the {@linkplain 2004 * Locale#getDefault(Locale.Category) default locale} for 2005 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2006 * virtual machine. 2007 * 2008 * @param fileName 2009 * The name of the file to use as the destination of this 2010 * formatter. If the file exists then it will be truncated to 2011 * zero size; otherwise, a new file will be created. The output 2012 * will be written to the file and is buffered. 2013 * 2014 * @param csn 2015 * The name of a supported {@linkplain java.nio.charset.Charset 2016 * charset} 2017 * 2018 * @throws FileNotFoundException 2019 * If the given file name does not denote an existing, writable 2020 * regular file and a new regular file of that name cannot be 2021 * created, or if some other error occurs while opening or 2022 * creating the file 2023 * 2024 * @throws SecurityException 2025 * If a security manager is present and {@link 2026 * SecurityManager#checkWrite checkWrite(fileName)} denies write 2027 * access to the file 2028 * 2029 * @throws UnsupportedEncodingException 2030 * If the named charset is not supported 2031 */ 2032 public Formatter(String fileName, String csn) 2033 throws FileNotFoundException, UnsupportedEncodingException 2034 { 2035 this(fileName, csn, Locale.getDefault(Locale.Category.FORMAT)); 2036 } 2037 2038 /** 2039 * Constructs a new formatter with the specified file name, charset, and 2040 * locale. 2041 * 2042 * @param fileName 2043 * The name of the file to use as the destination of this 2044 * formatter. If the file exists then it will be truncated to 2045 * zero size; otherwise, a new file will be created. The output 2046 * will be written to the file and is buffered. 2047 * 2048 * @param csn 2049 * The name of a supported {@linkplain java.nio.charset.Charset 2050 * charset} 2051 * 2052 * @param l 2053 * The {@linkplain java.util.Locale locale} to apply during 2054 * formatting. If {@code l} is {@code null} then no localization 2055 * is applied. 2056 * 2057 * @throws FileNotFoundException 2058 * If the given file name does not denote an existing, writable 2059 * regular file and a new regular file of that name cannot be 2060 * created, or if some other error occurs while opening or 2061 * creating the file 2062 * 2063 * @throws SecurityException 2064 * If a security manager is present and {@link 2065 * SecurityManager#checkWrite checkWrite(fileName)} denies write 2066 * access to the file 2067 * 2068 * @throws UnsupportedEncodingException 2069 * If the named charset is not supported 2070 */ 2071 public Formatter(String fileName, String csn, Locale l) 2072 throws FileNotFoundException, UnsupportedEncodingException 2073 { 2074 this(toCharset(csn), l, new File(fileName)); 2075 } 2076 2077 /** 2078 * Constructs a new formatter with the specified file. 2079 * 2080 * <p> The charset used is the {@linkplain 2081 * java.nio.charset.Charset#defaultCharset() default charset} for this 2082 * instance of the Java virtual machine. 2083 * 2084 * <p> The locale used is the {@linkplain 2085 * Locale#getDefault(Locale.Category) default locale} for 2086 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2087 * virtual machine. 2088 * 2089 * @param file 2090 * The file to use as the destination of this formatter. If the 2091 * file exists then it will be truncated to zero size; otherwise, 2092 * a new file will be created. The output will be written to the 2093 * file and is buffered. 2094 * 2095 * @throws SecurityException 2096 * If a security manager is present and {@link 2097 * SecurityManager#checkWrite checkWrite(file.getPath())} denies 2098 * write access to the file 2099 * 2100 * @throws FileNotFoundException 2101 * If the given file object does not denote an existing, writable 2102 * regular file and a new regular file of that name cannot be 2103 * created, or if some other error occurs while opening or 2104 * creating the file 2105 */ 2106 public Formatter(File file) throws FileNotFoundException { 2107 this(Locale.getDefault(Locale.Category.FORMAT), 2108 new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)))); 2109 } 2110 2111 /** 2112 * Constructs a new formatter with the specified file and charset. 2113 * 2114 * <p> The locale used is the {@linkplain 2115 * Locale#getDefault(Locale.Category) default locale} for 2116 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2117 * virtual machine. 2118 * 2119 * @param file 2120 * The file to use as the destination of this formatter. If the 2121 * file exists then it will be truncated to zero size; otherwise, 2122 * a new file will be created. The output will be written to the 2123 * file and is buffered. 2124 * 2125 * @param csn 2126 * The name of a supported {@linkplain java.nio.charset.Charset 2127 * charset} 2128 * 2129 * @throws FileNotFoundException 2130 * If the given file object does not denote an existing, writable 2131 * regular file and a new regular file of that name cannot be 2132 * created, or if some other error occurs while opening or 2133 * creating the file 2134 * 2135 * @throws SecurityException 2136 * If a security manager is present and {@link 2137 * SecurityManager#checkWrite checkWrite(file.getPath())} denies 2138 * write access to the file 2139 * 2140 * @throws UnsupportedEncodingException 2141 * If the named charset is not supported 2142 */ 2143 public Formatter(File file, String csn) 2144 throws FileNotFoundException, UnsupportedEncodingException 2145 { 2146 this(file, csn, Locale.getDefault(Locale.Category.FORMAT)); 2147 } 2148 2149 /** 2150 * Constructs a new formatter with the specified file, charset, and 2151 * locale. 2152 * 2153 * @param file 2154 * The file to use as the destination of this formatter. If the 2155 * file exists then it will be truncated to zero size; otherwise, 2156 * a new file will be created. The output will be written to the 2157 * file and is buffered. 2158 * 2159 * @param csn 2160 * The name of a supported {@linkplain java.nio.charset.Charset 2161 * charset} 2162 * 2163 * @param l 2164 * The {@linkplain java.util.Locale locale} to apply during 2165 * formatting. If {@code l} is {@code null} then no localization 2166 * is applied. 2167 * 2168 * @throws FileNotFoundException 2169 * If the given file object does not denote an existing, writable 2170 * regular file and a new regular file of that name cannot be 2171 * created, or if some other error occurs while opening or 2172 * creating the file 2173 * 2174 * @throws SecurityException 2175 * If a security manager is present and {@link 2176 * SecurityManager#checkWrite checkWrite(file.getPath())} denies 2177 * write access to the file 2178 * 2179 * @throws UnsupportedEncodingException 2180 * If the named charset is not supported 2181 */ 2182 public Formatter(File file, String csn, Locale l) 2183 throws FileNotFoundException, UnsupportedEncodingException 2184 { 2185 this(toCharset(csn), l, file); 2186 } 2187 2188 /** 2189 * Constructs a new formatter with the specified print stream. 2190 * 2191 * <p> The locale used is the {@linkplain 2192 * Locale#getDefault(Locale.Category) default locale} for 2193 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2194 * virtual machine. 2195 * 2196 * <p> Characters are written to the given {@link java.io.PrintStream 2197 * PrintStream} object and are therefore encoded using that object's 2198 * charset. 2199 * 2200 * @param ps 2201 * The stream to use as the destination of this formatter. 2202 */ 2203 public Formatter(PrintStream ps) { 2204 this(Locale.getDefault(Locale.Category.FORMAT), 2205 (Appendable)Objects.requireNonNull(ps)); 2206 } 2207 2208 /** 2209 * Constructs a new formatter with the specified output stream. 2210 * 2211 * <p> The charset used is the {@linkplain 2212 * java.nio.charset.Charset#defaultCharset() default charset} for this 2213 * instance of the Java virtual machine. 2214 * 2215 * <p> The locale used is the {@linkplain 2216 * Locale#getDefault(Locale.Category) default locale} for 2217 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2218 * virtual machine. 2219 * 2220 * @param os 2221 * The output stream to use as the destination of this formatter. 2222 * The output will be buffered. 2223 */ 2224 public Formatter(OutputStream os) { 2225 this(Locale.getDefault(Locale.Category.FORMAT), 2226 new BufferedWriter(new OutputStreamWriter(os))); 2227 } 2228 2229 /** 2230 * Constructs a new formatter with the specified output stream and 2231 * charset. 2232 * 2233 * <p> The locale used is the {@linkplain 2234 * Locale#getDefault(Locale.Category) default locale} for 2235 * {@linkplain Locale.Category#FORMAT formatting} for this instance of the Java 2236 * virtual machine. 2237 * 2238 * @param os 2239 * The output stream to use as the destination of this formatter. 2240 * The output will be buffered. 2241 * 2242 * @param csn 2243 * The name of a supported {@linkplain java.nio.charset.Charset 2244 * charset} 2245 * 2246 * @throws UnsupportedEncodingException 2247 * If the named charset is not supported 2248 */ 2249 public Formatter(OutputStream os, String csn) 2250 throws UnsupportedEncodingException 2251 { 2252 this(os, csn, Locale.getDefault(Locale.Category.FORMAT)); 2253 } 2254 2255 /** 2256 * Constructs a new formatter with the specified output stream, charset, 2257 * and locale. 2258 * 2259 * @param os 2260 * The output stream to use as the destination of this formatter. 2261 * The output will be buffered. 2262 * 2263 * @param csn 2264 * The name of a supported {@linkplain java.nio.charset.Charset 2265 * charset} 2266 * 2267 * @param l 2268 * The {@linkplain java.util.Locale locale} to apply during 2269 * formatting. If {@code l} is {@code null} then no localization 2270 * is applied. 2271 * 2272 * @throws UnsupportedEncodingException 2273 * If the named charset is not supported 2274 */ 2275 public Formatter(OutputStream os, String csn, Locale l) 2276 throws UnsupportedEncodingException 2277 { 2278 this(l, new BufferedWriter(new OutputStreamWriter(os, csn))); 2279 } 2280 2281 private static char getZero(Locale l) { 2282 if ((l != null) && !l.equals(Locale.US)) { 2283 DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(l); 2284 return dfs.getZeroDigit(); 2285 } else { 2286 return '0'; 2287 } 2288 } 2289 2290 /** 2291 * Returns the locale set by the construction of this formatter. 2292 * 2293 * <p> The {@link #format(java.util.Locale,String,Object...) format} method 2294 * for this object which has a locale argument does not change this value. 2295 * 2296 * @return {@code null} if no localization is applied, otherwise a 2297 * locale 2298 * 2299 * @throws FormatterClosedException 2300 * If this formatter has been closed by invoking its {@link 2301 * #close()} method 2302 */ 2303 public Locale locale() { 2304 ensureOpen(); 2305 return l; 2306 } 2307 2308 /** 2309 * Returns the destination for the output. 2310 * 2311 * @return The destination for the output 2312 * 2313 * @throws FormatterClosedException 2314 * If this formatter has been closed by invoking its {@link 2315 * #close()} method 2316 */ 2317 public Appendable out() { 2318 ensureOpen(); 2319 return a; 2320 } 2321 2322 /** 2323 * Returns the result of invoking {@code toString()} on the destination 2324 * for the output. For example, the following code formats text into a 2325 * {@link StringBuilder} then retrieves the resultant string: 2326 * 2327 * <blockquote><pre> 2328 * Formatter f = new Formatter(); 2329 * f.format("Last reboot at %tc", lastRebootDate); 2330 * String s = f.toString(); 2331 * // -> s == "Last reboot at Sat Jan 01 00:00:00 PST 2000" 2332 * </pre></blockquote> 2333 * 2334 * <p> An invocation of this method behaves in exactly the same way as the 2335 * invocation 2336 * 2337 * <pre> 2338 * out().toString() </pre> 2339 * 2340 * <p> Depending on the specification of {@code toString} for the {@link 2341 * Appendable}, the returned string may or may not contain the characters 2342 * written to the destination. For instance, buffers typically return 2343 * their contents in {@code toString()}, but streams cannot since the 2344 * data is discarded. 2345 * 2346 * @return The result of invoking {@code toString()} on the destination 2347 * for the output 2348 * 2349 * @throws FormatterClosedException 2350 * If this formatter has been closed by invoking its {@link 2351 * #close()} method 2352 */ 2353 public String toString() { 2354 ensureOpen(); 2355 return a.toString(); 2356 } 2357 2358 /** 2359 * Flushes this formatter. If the destination implements the {@link 2360 * java.io.Flushable} interface, its {@code flush} method will be invoked. 2361 * 2362 * <p> Flushing a formatter writes any buffered output in the destination 2363 * to the underlying stream. 2364 * 2365 * @throws FormatterClosedException 2366 * If this formatter has been closed by invoking its {@link 2367 * #close()} method 2368 */ 2369 public void flush() { 2370 ensureOpen(); 2371 if (a instanceof Flushable) { 2372 try { 2373 ((Flushable)a).flush(); 2374 } catch (IOException ioe) { 2375 lastException = ioe; 2376 } 2377 } 2378 } 2379 2380 /** 2381 * Closes this formatter. If the destination implements the {@link 2382 * java.io.Closeable} interface, its {@code close} method will be invoked. 2383 * 2384 * <p> Closing a formatter allows it to release resources it may be holding 2385 * (such as open files). If the formatter is already closed, then invoking 2386 * this method has no effect. 2387 * 2388 * <p> Attempting to invoke any methods except {@link #ioException()} in 2389 * this formatter after it has been closed will result in a {@link 2390 * FormatterClosedException}. 2391 */ 2392 public void close() { 2393 if (a == null) 2394 return; 2395 try { 2396 if (a instanceof Closeable) 2397 ((Closeable)a).close(); 2398 } catch (IOException ioe) { 2399 lastException = ioe; 2400 } finally { 2401 a = null; 2402 } 2403 } 2404 2405 private void ensureOpen() { 2406 if (a == null) 2407 throw new FormatterClosedException(); 2408 } 2409 2410 /** 2411 * Returns the {@code IOException} last thrown by this formatter's {@link 2412 * Appendable}. 2413 * 2414 * <p> If the destination's {@code append()} method never throws 2415 * {@code IOException}, then this method will always return {@code null}. 2416 * 2417 * @return The last exception thrown by the Appendable or {@code null} if 2418 * no such exception exists. 2419 */ 2420 public IOException ioException() { 2421 return lastException; 2422 } 2423 2424 /** 2425 * Writes a formatted string to this object's destination using the 2426 * specified format string and arguments. The locale used is the one 2427 * defined during the construction of this formatter. 2428 * 2429 * @param format 2430 * A format string as described in <a href="#syntax">Format string 2431 * syntax</a>. 2432 * 2433 * @param args 2434 * Arguments referenced by the format specifiers in the format 2435 * string. If there are more arguments than format specifiers, the 2436 * extra arguments are ignored. The maximum number of arguments is 2437 * limited by the maximum dimension of a Java array as defined by 2438 * <cite>The Java™ Virtual Machine Specification</cite>. 2439 * 2440 * @throws IllegalFormatException 2441 * If a format string contains an illegal syntax, a format 2442 * specifier that is incompatible with the given arguments, 2443 * insufficient arguments given the format string, or other 2444 * illegal conditions. For specification of all possible 2445 * formatting errors, see the <a href="#detail">Details</a> 2446 * section of the formatter class specification. 2447 * 2448 * @throws FormatterClosedException 2449 * If this formatter has been closed by invoking its {@link 2450 * #close()} method 2451 * 2452 * @return This formatter 2453 */ 2454 public Formatter format(String format, Object ... args) { 2455 return format(l, format, args); 2456 } 2457 2458 /** 2459 * Writes a formatted string to this object's destination using the 2460 * specified locale, format string, and arguments. 2461 * 2462 * @param l 2463 * The {@linkplain java.util.Locale locale} to apply during 2464 * formatting. If {@code l} is {@code null} then no localization 2465 * is applied. This does not change this object's locale that was 2466 * set during construction. 2467 * 2468 * @param format 2469 * A format string as described in <a href="#syntax">Format string 2470 * syntax</a> 2471 * 2472 * @param args 2473 * Arguments referenced by the format specifiers in the format 2474 * string. If there are more arguments than format specifiers, the 2475 * extra arguments are ignored. The maximum number of arguments is 2476 * limited by the maximum dimension of a Java array as defined by 2477 * <cite>The Java™ Virtual Machine Specification</cite>. 2478 * 2479 * @throws IllegalFormatException 2480 * If a format string contains an illegal syntax, a format 2481 * specifier that is incompatible with the given arguments, 2482 * insufficient arguments given the format string, or other 2483 * illegal conditions. For specification of all possible 2484 * formatting errors, see the <a href="#detail">Details</a> 2485 * section of the formatter class specification. 2486 * 2487 * @throws FormatterClosedException 2488 * If this formatter has been closed by invoking its {@link 2489 * #close()} method 2490 * 2491 * @return This formatter 2492 */ 2493 public Formatter format(Locale l, String format, Object ... args) { 2494 ensureOpen(); 2495 2496 // index of last argument referenced 2497 int last = -1; 2498 // last ordinary index 2499 int lasto = -1; 2500 2501 List<FormatString> fsa = parse(format); 2502 for (FormatString fs : fsa) { 2503 int index = fs.index(); 2504 try { 2505 switch (index) { 2506 case -2: // fixed string, "%n", or "%%" 2507 fs.print(null, l); 2508 break; 2509 case -1: // relative index 2510 if (last < 0 || (args != null && last > args.length - 1)) 2511 throw new MissingFormatArgumentException(fs.toString()); 2512 fs.print((args == null ? null : args[last]), l); 2513 break; 2514 case 0: // ordinary index 2515 lasto++; 2516 last = lasto; 2517 if (args != null && lasto > args.length - 1) 2518 throw new MissingFormatArgumentException(fs.toString()); 2519 fs.print((args == null ? null : args[lasto]), l); 2520 break; 2521 default: // explicit index 2522 last = index - 1; 2523 if (args != null && last > args.length - 1) 2524 throw new MissingFormatArgumentException(fs.toString()); 2525 fs.print((args == null ? null : args[last]), l); 2526 break; 2527 } 2528 } catch (IOException x) { 2529 lastException = x; 2530 } 2531 } 2532 return this; 2533 } 2534 2535 // %[argument_index$][flags][width][.precision][t]conversion 2536 private static final String formatSpecifier 2537 = "%(\\d+\\$)?([-#+ 0,(\\<]*)?(\\d+)?(\\.\\d+)?([tT])?([a-zA-Z%])"; 2538 2539 private static Pattern fsPattern = Pattern.compile(formatSpecifier); 2540 2541 /** 2542 * Finds format specifiers in the format string. 2543 */ 2544 private List<FormatString> parse(String s) { 2545 ArrayList<FormatString> al = new ArrayList<>(); 2546 Matcher m = fsPattern.matcher(s); 2547 for (int i = 0, len = s.length(); i < len; ) { 2548 if (m.find(i)) { 2549 // Anything between the start of the string and the beginning 2550 // of the format specifier is either fixed text or contains 2551 // an invalid format string. 2552 if (m.start() != i) { 2553 // Make sure we didn't miss any invalid format specifiers 2554 checkText(s, i, m.start()); 2555 // Assume previous characters were fixed text 2556 al.add(new FixedString(s, i, m.start())); 2557 } 2558 2559 al.add(new FormatSpecifier(s, m)); 2560 i = m.end(); 2561 } else { 2562 // No more valid format specifiers. Check for possible invalid 2563 // format specifiers. 2564 checkText(s, i, len); 2565 // The rest of the string is fixed text 2566 al.add(new FixedString(s, i, s.length())); 2567 break; 2568 } 2569 } 2570 return al; 2571 } 2572 2573 private static void checkText(String s, int start, int end) { 2574 for (int i = start; i < end; i++) { 2575 // Any '%' found in the region starts an invalid format specifier. 2576 if (s.charAt(i) == '%') { 2577 char c = (i == end - 1) ? '%' : s.charAt(i + 1); 2578 throw new UnknownFormatConversionException(String.valueOf(c)); 2579 } 2580 } 2581 } 2582 2583 private interface FormatString { 2584 int index(); 2585 void print(Object arg, Locale l) throws IOException; 2586 String toString(); 2587 } 2588 2589 private class FixedString implements FormatString { 2590 private String s; 2591 private int start; 2592 private int end; 2593 FixedString(String s, int start, int end) { 2594 this.s = s; 2595 this.start = start; 2596 this.end = end; 2597 } 2598 public int index() { return -2; } 2599 public void print(Object arg, Locale l) 2600 throws IOException { a.append(s, start, end); } 2601 public String toString() { return s.substring(start, end); } 2602 } 2603 2604 /** 2605 * Enum for {@code BigDecimal} formatting. 2606 */ 2607 public enum BigDecimalLayoutForm { 2608 /** 2609 * Format the {@code BigDecimal} in computerized scientific notation. 2610 */ 2611 SCIENTIFIC, 2612 2613 /** 2614 * Format the {@code BigDecimal} as a decimal number. 2615 */ 2616 DECIMAL_FLOAT 2617 }; 2618 2619 private class FormatSpecifier implements FormatString { 2620 private int index = -1; 2621 private Flags f = Flags.NONE; 2622 private int width; 2623 private int precision; 2624 private boolean dt = false; 2625 private char c; 2626 2627 private int index(String s) { 2628 if (s != null) { 2629 try { 2630 index = Integer.parseInt(s.substring(0, s.length() - 1)); 2631 } catch (NumberFormatException x) { 2632 assert(false); 2633 } 2634 } else { 2635 index = 0; 2636 } 2637 return index; 2638 } 2639 2640 public int index() { 2641 return index; 2642 } 2643 2644 private Flags flags(String s, int start, int end) { 2645 f = Flags.parse(s, start, end); 2646 if (f.contains(Flags.PREVIOUS)) 2647 index = -1; 2648 return f; 2649 } 2650 2651 private int width(String s) { 2652 width = -1; 2653 if (s != null) { 2654 try { 2655 width = Integer.parseInt(s); 2656 if (width < 0) 2657 throw new IllegalFormatWidthException(width); 2658 } catch (NumberFormatException x) { 2659 assert(false); 2660 } 2661 } 2662 return width; 2663 } 2664 2665 private int precision(String s) { 2666 precision = -1; 2667 if (s != null) { 2668 try { 2669 // remove the '.' 2670 precision = Integer.parseInt(s.substring(1)); 2671 if (precision < 0) 2672 throw new IllegalFormatPrecisionException(precision); 2673 } catch (NumberFormatException x) { 2674 assert(false); 2675 } 2676 } 2677 return precision; 2678 } 2679 2680 private char conversion(char conv) { 2681 c = conv; 2682 if (!dt) { 2683 if (!Conversion.isValid(c)) { 2684 throw new UnknownFormatConversionException(String.valueOf(c)); 2685 } 2686 if (Character.isUpperCase(c)) { 2687 f.add(Flags.UPPERCASE); 2688 c = Character.toLowerCase(c); 2689 } 2690 if (Conversion.isText(c)) { 2691 index = -2; 2692 } 2693 } 2694 return c; 2695 } 2696 2697 FormatSpecifier(String s, Matcher m) { 2698 int idx = 1; 2699 2700 index(m.group(idx++)); 2701 flags(s, m.start(idx), m.end(idx++)); 2702 width(m.group(idx++)); 2703 precision(m.group(idx++)); 2704 2705 int tTStart = m.start(idx); 2706 int tTEnd = m.end(idx++); 2707 if (tTStart != -1 && tTEnd != -1) { 2708 dt = true; 2709 if (tTStart == tTEnd - 1 && s.charAt(tTStart) == 'T') { 2710 f.add(Flags.UPPERCASE); 2711 } 2712 } 2713 2714 conversion(s.charAt(m.start(idx))); 2715 2716 if (dt) 2717 checkDateTime(); 2718 else if (Conversion.isGeneral(c)) 2719 checkGeneral(); 2720 else if (Conversion.isCharacter(c)) 2721 checkCharacter(); 2722 else if (Conversion.isInteger(c)) 2723 checkInteger(); 2724 else if (Conversion.isFloat(c)) 2725 checkFloat(); 2726 else if (Conversion.isText(c)) 2727 checkText(); 2728 else 2729 throw new UnknownFormatConversionException(String.valueOf(c)); 2730 } 2731 2732 public void print(Object arg, Locale l) throws IOException { 2733 if (dt) { 2734 printDateTime(arg, l); 2735 return; 2736 } 2737 switch(c) { 2738 case Conversion.DECIMAL_INTEGER: 2739 case Conversion.OCTAL_INTEGER: 2740 case Conversion.HEXADECIMAL_INTEGER: 2741 printInteger(arg, l); 2742 break; 2743 case Conversion.SCIENTIFIC: 2744 case Conversion.GENERAL: 2745 case Conversion.DECIMAL_FLOAT: 2746 case Conversion.HEXADECIMAL_FLOAT: 2747 printFloat(arg, l); 2748 break; 2749 case Conversion.CHARACTER: 2750 case Conversion.CHARACTER_UPPER: 2751 printCharacter(arg); 2752 break; 2753 case Conversion.BOOLEAN: 2754 printBoolean(arg); 2755 break; 2756 case Conversion.STRING: 2757 printString(arg, l); 2758 break; 2759 case Conversion.HASHCODE: 2760 printHashCode(arg); 2761 break; 2762 case Conversion.LINE_SEPARATOR: 2763 a.append(System.lineSeparator()); 2764 break; 2765 case Conversion.PERCENT_SIGN: 2766 a.append('%'); 2767 break; 2768 default: 2769 assert false; 2770 } 2771 } 2772 2773 private void printInteger(Object arg, Locale l) throws IOException { 2774 if (arg == null) 2775 print("null"); 2776 else if (arg instanceof Byte) 2777 print(((Byte)arg).byteValue(), l); 2778 else if (arg instanceof Short) 2779 print(((Short)arg).shortValue(), l); 2780 else if (arg instanceof Integer) 2781 print(((Integer)arg).intValue(), l); 2782 else if (arg instanceof Long) 2783 print(((Long)arg).longValue(), l); 2784 else if (arg instanceof BigInteger) 2785 print(((BigInteger)arg), l); 2786 else 2787 failConversion(c, arg); 2788 } 2789 2790 private void printFloat(Object arg, Locale l) throws IOException { 2791 if (arg == null) 2792 print("null"); 2793 else if (arg instanceof Float) 2794 print(((Float)arg).floatValue(), l); 2795 else if (arg instanceof Double) 2796 print(((Double)arg).doubleValue(), l); 2797 else if (arg instanceof BigDecimal) 2798 print(((BigDecimal)arg), l); 2799 else 2800 failConversion(c, arg); 2801 } 2802 2803 private void printDateTime(Object arg, Locale l) throws IOException { 2804 if (arg == null) { 2805 print("null"); 2806 return; 2807 } 2808 Calendar cal = null; 2809 2810 // Instead of Calendar.setLenient(true), perhaps we should 2811 // wrap the IllegalArgumentException that might be thrown? 2812 if (arg instanceof Long) { 2813 // Note that the following method uses an instance of the 2814 // default time zone (TimeZone.getDefaultRef(). 2815 cal = Calendar.getInstance(l == null ? Locale.US : l); 2816 cal.setTimeInMillis((Long)arg); 2817 } else if (arg instanceof Date) { 2818 // Note that the following method uses an instance of the 2819 // default time zone (TimeZone.getDefaultRef(). 2820 cal = Calendar.getInstance(l == null ? Locale.US : l); 2821 cal.setTime((Date)arg); 2822 } else if (arg instanceof Calendar) { 2823 cal = (Calendar) ((Calendar) arg).clone(); 2824 cal.setLenient(true); 2825 } else if (arg instanceof TemporalAccessor) { 2826 print((TemporalAccessor) arg, c, l); 2827 return; 2828 } else { 2829 failConversion(c, arg); 2830 } 2831 // Use the provided locale so that invocations of 2832 // localizedMagnitude() use optimizations for null. 2833 print(cal, c, l); 2834 } 2835 2836 private void printCharacter(Object arg) throws IOException { 2837 if (arg == null) { 2838 print("null"); 2839 return; 2840 } 2841 String s = null; 2842 if (arg instanceof Character) { 2843 s = ((Character)arg).toString(); 2844 } else if (arg instanceof Byte) { 2845 byte i = ((Byte)arg).byteValue(); 2846 if (Character.isValidCodePoint(i)) 2847 s = new String(Character.toChars(i)); 2848 else 2849 throw new IllegalFormatCodePointException(i); 2850 } else if (arg instanceof Short) { 2851 short i = ((Short)arg).shortValue(); 2852 if (Character.isValidCodePoint(i)) 2853 s = new String(Character.toChars(i)); 2854 else 2855 throw new IllegalFormatCodePointException(i); 2856 } else if (arg instanceof Integer) { 2857 int i = ((Integer)arg).intValue(); 2858 if (Character.isValidCodePoint(i)) 2859 s = new String(Character.toChars(i)); 2860 else 2861 throw new IllegalFormatCodePointException(i); 2862 } else { 2863 failConversion(c, arg); 2864 } 2865 print(s); 2866 } 2867 2868 private void printString(Object arg, Locale l) throws IOException { 2869 if (arg instanceof Formattable) { 2870 Formatter fmt = Formatter.this; 2871 if (fmt.locale() != l) 2872 fmt = new Formatter(fmt.out(), l); 2873 ((Formattable)arg).formatTo(fmt, f.valueOf(), width, precision); 2874 } else { 2875 if (f.contains(Flags.ALTERNATE)) 2876 failMismatch(Flags.ALTERNATE, 's'); 2877 if (arg == null) 2878 print("null"); 2879 else 2880 print(arg.toString()); 2881 } 2882 } 2883 2884 private void printBoolean(Object arg) throws IOException { 2885 String s; 2886 if (arg != null) 2887 s = ((arg instanceof Boolean) 2888 ? ((Boolean)arg).toString() 2889 : Boolean.toString(true)); 2890 else 2891 s = Boolean.toString(false); 2892 print(s); 2893 } 2894 2895 private void printHashCode(Object arg) throws IOException { 2896 String s = (arg == null 2897 ? "null" 2898 : Integer.toHexString(arg.hashCode())); 2899 print(s); 2900 } 2901 2902 private void print(String s) throws IOException { 2903 if (precision != -1 && precision < s.length()) 2904 s = s.substring(0, precision); 2905 if (f.contains(Flags.UPPERCASE)) 2906 s = s.toUpperCase(); 2907 appendJustified(a, s); 2908 } 2909 2910 private Appendable appendJustified(Appendable a, CharSequence cs) throws IOException { 2911 if (width == -1) { 2912 return a.append(cs); 2913 } 2914 boolean padRight = f.contains(Flags.LEFT_JUSTIFY); 2915 int sp = width - cs.length(); 2916 if (padRight) { 2917 a.append(cs); 2918 } 2919 for (int i = 0; i < sp; i++) { 2920 a.append(' '); 2921 } 2922 if (!padRight) { 2923 a.append(cs); 2924 } 2925 return a; 2926 } 2927 2928 public String toString() { 2929 StringBuilder sb = new StringBuilder("%"); 2930 // Flags.UPPERCASE is set internally for legal conversions. 2931 Flags dupf = f.dup().remove(Flags.UPPERCASE); 2932 sb.append(dupf.toString()); 2933 if (index > 0) 2934 sb.append(index).append('$'); 2935 if (width != -1) 2936 sb.append(width); 2937 if (precision != -1) 2938 sb.append('.').append(precision); 2939 if (dt) 2940 sb.append(f.contains(Flags.UPPERCASE) ? 'T' : 't'); 2941 sb.append(f.contains(Flags.UPPERCASE) 2942 ? Character.toUpperCase(c) : c); 2943 return sb.toString(); 2944 } 2945 2946 private void checkGeneral() { 2947 if ((c == Conversion.BOOLEAN || c == Conversion.HASHCODE) 2948 && f.contains(Flags.ALTERNATE)) 2949 failMismatch(Flags.ALTERNATE, c); 2950 // '-' requires a width 2951 if (width == -1 && f.contains(Flags.LEFT_JUSTIFY)) 2952 throw new MissingFormatWidthException(toString()); 2953 checkBadFlags(Flags.PLUS, Flags.LEADING_SPACE, Flags.ZERO_PAD, 2954 Flags.GROUP, Flags.PARENTHESES); 2955 } 2956 2957 private void checkDateTime() { 2958 if (precision != -1) 2959 throw new IllegalFormatPrecisionException(precision); 2960 if (!DateTime.isValid(c)) 2961 throw new UnknownFormatConversionException("t" + c); 2962 checkBadFlags(Flags.ALTERNATE, Flags.PLUS, Flags.LEADING_SPACE, 2963 Flags.ZERO_PAD, Flags.GROUP, Flags.PARENTHESES); 2964 // '-' requires a width 2965 if (width == -1 && f.contains(Flags.LEFT_JUSTIFY)) 2966 throw new MissingFormatWidthException(toString()); 2967 } 2968 2969 private void checkCharacter() { 2970 if (precision != -1) 2971 throw new IllegalFormatPrecisionException(precision); 2972 checkBadFlags(Flags.ALTERNATE, Flags.PLUS, Flags.LEADING_SPACE, 2973 Flags.ZERO_PAD, Flags.GROUP, Flags.PARENTHESES); 2974 // '-' requires a width 2975 if (width == -1 && f.contains(Flags.LEFT_JUSTIFY)) 2976 throw new MissingFormatWidthException(toString()); 2977 } 2978 2979 private void checkInteger() { 2980 checkNumeric(); 2981 if (precision != -1) 2982 throw new IllegalFormatPrecisionException(precision); 2983 2984 if (c == Conversion.DECIMAL_INTEGER) 2985 checkBadFlags(Flags.ALTERNATE); 2986 else if (c == Conversion.OCTAL_INTEGER) 2987 checkBadFlags(Flags.GROUP); 2988 else 2989 checkBadFlags(Flags.GROUP); 2990 } 2991 2992 private void checkBadFlags(Flags ... badFlags) { 2993 for (Flags badFlag : badFlags) 2994 if (f.contains(badFlag)) 2995 failMismatch(badFlag, c); 2996 } 2997 2998 private void checkFloat() { 2999 checkNumeric(); 3000 if (c == Conversion.DECIMAL_FLOAT) { 3001 } else if (c == Conversion.HEXADECIMAL_FLOAT) { 3002 checkBadFlags(Flags.PARENTHESES, Flags.GROUP); 3003 } else if (c == Conversion.SCIENTIFIC) { 3004 checkBadFlags(Flags.GROUP); 3005 } else if (c == Conversion.GENERAL) { 3006 checkBadFlags(Flags.ALTERNATE); 3007 } 3008 } 3009 3010 private void checkNumeric() { 3011 if (width != -1 && width < 0) 3012 throw new IllegalFormatWidthException(width); 3013 3014 if (precision != -1 && precision < 0) 3015 throw new IllegalFormatPrecisionException(precision); 3016 3017 // '-' and '0' require a width 3018 if (width == -1 3019 && (f.contains(Flags.LEFT_JUSTIFY) || f.contains(Flags.ZERO_PAD))) 3020 throw new MissingFormatWidthException(toString()); 3021 3022 // bad combination 3023 if ((f.contains(Flags.PLUS) && f.contains(Flags.LEADING_SPACE)) 3024 || (f.contains(Flags.LEFT_JUSTIFY) && f.contains(Flags.ZERO_PAD))) 3025 throw new IllegalFormatFlagsException(f.toString()); 3026 } 3027 3028 private void checkText() { 3029 if (precision != -1) 3030 throw new IllegalFormatPrecisionException(precision); 3031 switch (c) { 3032 case Conversion.PERCENT_SIGN: 3033 if (f.valueOf() != Flags.LEFT_JUSTIFY.valueOf() 3034 && f.valueOf() != Flags.NONE.valueOf()) 3035 throw new IllegalFormatFlagsException(f.toString()); 3036 // '-' requires a width 3037 if (width == -1 && f.contains(Flags.LEFT_JUSTIFY)) 3038 throw new MissingFormatWidthException(toString()); 3039 break; 3040 case Conversion.LINE_SEPARATOR: 3041 if (width != -1) 3042 throw new IllegalFormatWidthException(width); 3043 if (f.valueOf() != Flags.NONE.valueOf()) 3044 throw new IllegalFormatFlagsException(f.toString()); 3045 break; 3046 default: 3047 assert false; 3048 } 3049 } 3050 3051 private void print(byte value, Locale l) throws IOException { 3052 long v = value; 3053 if (value < 0 3054 && (c == Conversion.OCTAL_INTEGER 3055 || c == Conversion.HEXADECIMAL_INTEGER)) { 3056 v += (1L << 8); 3057 assert v >= 0 : v; 3058 } 3059 print(v, l); 3060 } 3061 3062 private void print(short value, Locale l) throws IOException { 3063 long v = value; 3064 if (value < 0 3065 && (c == Conversion.OCTAL_INTEGER 3066 || c == Conversion.HEXADECIMAL_INTEGER)) { 3067 v += (1L << 16); 3068 assert v >= 0 : v; 3069 } 3070 print(v, l); 3071 } 3072 3073 private void print(int value, Locale l) throws IOException { 3074 long v = value; 3075 if (value < 0 3076 && (c == Conversion.OCTAL_INTEGER 3077 || c == Conversion.HEXADECIMAL_INTEGER)) { 3078 v += (1L << 32); 3079 assert v >= 0 : v; 3080 } 3081 print(v, l); 3082 } 3083 3084 private void print(long value, Locale l) throws IOException { 3085 3086 StringBuilder sb = new StringBuilder(); 3087 3088 if (c == Conversion.DECIMAL_INTEGER) { 3089 boolean neg = value < 0; 3090 String valueStr = Long.toString(value, 10); 3091 3092 // leading sign indicator 3093 leadingSign(sb, neg); 3094 3095 // the value 3096 localizedMagnitude(sb, valueStr, neg ? 1 : 0, f, adjustWidth(width, f, neg), l); 3097 3098 // trailing sign indicator 3099 trailingSign(sb, neg); 3100 } else if (c == Conversion.OCTAL_INTEGER) { 3101 checkBadFlags(Flags.PARENTHESES, Flags.LEADING_SPACE, 3102 Flags.PLUS); 3103 String s = Long.toOctalString(value); 3104 int len = (f.contains(Flags.ALTERNATE) 3105 ? s.length() + 1 3106 : s.length()); 3107 3108 // apply ALTERNATE (radix indicator for octal) before ZERO_PAD 3109 if (f.contains(Flags.ALTERNATE)) 3110 sb.append('0'); 3111 if (f.contains(Flags.ZERO_PAD)) { 3112 trailingZeros(sb, width - len); 3113 } 3114 sb.append(s); 3115 } else if (c == Conversion.HEXADECIMAL_INTEGER) { 3116 checkBadFlags(Flags.PARENTHESES, Flags.LEADING_SPACE, 3117 Flags.PLUS); 3118 String s = Long.toHexString(value); 3119 int len = (f.contains(Flags.ALTERNATE) 3120 ? s.length() + 2 3121 : s.length()); 3122 3123 // apply ALTERNATE (radix indicator for hex) before ZERO_PAD 3124 if (f.contains(Flags.ALTERNATE)) 3125 sb.append(f.contains(Flags.UPPERCASE) ? "0X" : "0x"); 3126 if (f.contains(Flags.ZERO_PAD)) { 3127 trailingZeros(sb, width - len); 3128 } 3129 if (f.contains(Flags.UPPERCASE)) 3130 s = s.toUpperCase(); 3131 sb.append(s); 3132 } 3133 3134 // justify based on width 3135 appendJustified(a, sb); 3136 } 3137 3138 // neg := val < 0 3139 private StringBuilder leadingSign(StringBuilder sb, boolean neg) { 3140 if (!neg) { 3141 if (f.contains(Flags.PLUS)) { 3142 sb.append('+'); 3143 } else if (f.contains(Flags.LEADING_SPACE)) { 3144 sb.append(' '); 3145 } 3146 } else { 3147 if (f.contains(Flags.PARENTHESES)) 3148 sb.append('('); 3149 else 3150 sb.append('-'); 3151 } 3152 return sb; 3153 } 3154 3155 // neg := val < 0 3156 private StringBuilder trailingSign(StringBuilder sb, boolean neg) { 3157 if (neg && f.contains(Flags.PARENTHESES)) 3158 sb.append(')'); 3159 return sb; 3160 } 3161 3162 private void print(BigInteger value, Locale l) throws IOException { 3163 StringBuilder sb = new StringBuilder(); 3164 boolean neg = value.signum() == -1; 3165 BigInteger v = value.abs(); 3166 3167 // leading sign indicator 3168 leadingSign(sb, neg); 3169 3170 // the value 3171 if (c == Conversion.DECIMAL_INTEGER) { 3172 localizedMagnitude(sb, v.toString(), 0, f, adjustWidth(width, f, neg), l); 3173 } else if (c == Conversion.OCTAL_INTEGER) { 3174 String s = v.toString(8); 3175 3176 int len = s.length() + sb.length(); 3177 if (neg && f.contains(Flags.PARENTHESES)) 3178 len++; 3179 3180 // apply ALTERNATE (radix indicator for octal) before ZERO_PAD 3181 if (f.contains(Flags.ALTERNATE)) { 3182 len++; 3183 sb.append('0'); 3184 } 3185 if (f.contains(Flags.ZERO_PAD)) { 3186 trailingZeros(sb, width - len); 3187 } 3188 sb.append(s); 3189 } else if (c == Conversion.HEXADECIMAL_INTEGER) { 3190 String s = v.toString(16); 3191 3192 int len = s.length() + sb.length(); 3193 if (neg && f.contains(Flags.PARENTHESES)) 3194 len++; 3195 3196 // apply ALTERNATE (radix indicator for hex) before ZERO_PAD 3197 if (f.contains(Flags.ALTERNATE)) { 3198 len += 2; 3199 sb.append(f.contains(Flags.UPPERCASE) ? "0X" : "0x"); 3200 } 3201 if (f.contains(Flags.ZERO_PAD)) { 3202 trailingZeros(sb, width - len); 3203 } 3204 if (f.contains(Flags.UPPERCASE)) 3205 s = s.toUpperCase(); 3206 sb.append(s); 3207 } 3208 3209 // trailing sign indicator 3210 trailingSign(sb, (value.signum() == -1)); 3211 3212 // justify based on width 3213 appendJustified(a, sb); 3214 } 3215 3216 private void print(float value, Locale l) throws IOException { 3217 print((double) value, l); 3218 } 3219 3220 private void print(double value, Locale l) throws IOException { 3221 StringBuilder sb = new StringBuilder(); 3222 boolean neg = Double.compare(value, 0.0) == -1; 3223 3224 if (!Double.isNaN(value)) { 3225 double v = Math.abs(value); 3226 3227 // leading sign indicator 3228 leadingSign(sb, neg); 3229 3230 // the value 3231 if (!Double.isInfinite(v)) 3232 print(sb, v, l, f, c, precision, neg); 3233 else 3234 sb.append(f.contains(Flags.UPPERCASE) 3235 ? "INFINITY" : "Infinity"); 3236 3237 // trailing sign indicator 3238 trailingSign(sb, neg); 3239 } else { 3240 sb.append(f.contains(Flags.UPPERCASE) ? "NAN" : "NaN"); 3241 } 3242 3243 // justify based on width 3244 appendJustified(a, sb); 3245 } 3246 3247 // !Double.isInfinite(value) && !Double.isNaN(value) 3248 private void print(StringBuilder sb, double value, Locale l, 3249 Flags f, char c, int precision, boolean neg) 3250 throws IOException 3251 { 3252 if (c == Conversion.SCIENTIFIC) { 3253 // Create a new FormattedFloatingDecimal with the desired 3254 // precision. 3255 int prec = (precision == -1 ? 6 : precision); 3256 3257 FormattedFloatingDecimal fd 3258 = FormattedFloatingDecimal.valueOf(value, prec, 3259 FormattedFloatingDecimal.Form.SCIENTIFIC); 3260 3261 StringBuilder mant = new StringBuilder().append(fd.getMantissa()); 3262 addZeros(mant, prec); 3263 3264 // If the precision is zero and the '#' flag is set, add the 3265 // requested decimal point. 3266 if (f.contains(Flags.ALTERNATE) && (prec == 0)) { 3267 mant.append('.'); 3268 } 3269 3270 char[] exp = (value == 0.0) 3271 ? new char[] {'+','0','0'} : fd.getExponent(); 3272 3273 int newW = width; 3274 if (width != -1) { 3275 newW = adjustWidth(width - exp.length - 1, f, neg); 3276 } 3277 localizedMagnitude(sb, mant, 0, f, newW, l); 3278 3279 sb.append(f.contains(Flags.UPPERCASE) ? 'E' : 'e'); 3280 3281 char sign = exp[0]; 3282 assert(sign == '+' || sign == '-'); 3283 sb.append(sign); 3284 3285 localizedMagnitudeExp(sb, exp, 1, l); 3286 } else if (c == Conversion.DECIMAL_FLOAT) { 3287 // Create a new FormattedFloatingDecimal with the desired 3288 // precision. 3289 int prec = (precision == -1 ? 6 : precision); 3290 3291 FormattedFloatingDecimal fd 3292 = FormattedFloatingDecimal.valueOf(value, prec, 3293 FormattedFloatingDecimal.Form.DECIMAL_FLOAT); 3294 3295 StringBuilder mant = new StringBuilder().append(fd.getMantissa()); 3296 addZeros(mant, prec); 3297 3298 // If the precision is zero and the '#' flag is set, add the 3299 // requested decimal point. 3300 if (f.contains(Flags.ALTERNATE) && (prec == 0)) 3301 mant.append('.'); 3302 3303 int newW = width; 3304 if (width != -1) 3305 newW = adjustWidth(width, f, neg); 3306 localizedMagnitude(sb, mant, 0, f, newW, l); 3307 } else if (c == Conversion.GENERAL) { 3308 int prec = precision; 3309 if (precision == -1) 3310 prec = 6; 3311 else if (precision == 0) 3312 prec = 1; 3313 3314 char[] exp; 3315 StringBuilder mant = new StringBuilder(); 3316 int expRounded; 3317 if (value == 0.0) { 3318 exp = null; 3319 mant.append('0'); 3320 expRounded = 0; 3321 } else { 3322 FormattedFloatingDecimal fd 3323 = FormattedFloatingDecimal.valueOf(value, prec, 3324 FormattedFloatingDecimal.Form.GENERAL); 3325 exp = fd.getExponent(); 3326 mant.append(fd.getMantissa()); 3327 expRounded = fd.getExponentRounded(); 3328 } 3329 3330 if (exp != null) { 3331 prec -= 1; 3332 } else { 3333 prec -= expRounded + 1; 3334 } 3335 3336 addZeros(mant, prec); 3337 // If the precision is zero and the '#' flag is set, add the 3338 // requested decimal point. 3339 if (f.contains(Flags.ALTERNATE) && (prec == 0)) { 3340 mant.append('.'); 3341 } 3342 3343 int newW = width; 3344 if (width != -1) { 3345 if (exp != null) 3346 newW = adjustWidth(width - exp.length - 1, f, neg); 3347 else 3348 newW = adjustWidth(width, f, neg); 3349 } 3350 localizedMagnitude(sb, mant, 0, f, newW, l); 3351 3352 if (exp != null) { 3353 sb.append(f.contains(Flags.UPPERCASE) ? 'E' : 'e'); 3354 3355 char sign = exp[0]; 3356 assert(sign == '+' || sign == '-'); 3357 sb.append(sign); 3358 3359 localizedMagnitudeExp(sb, exp, 1, l); 3360 } 3361 } else if (c == Conversion.HEXADECIMAL_FLOAT) { 3362 int prec = precision; 3363 if (precision == -1) 3364 // assume that we want all of the digits 3365 prec = 0; 3366 else if (precision == 0) 3367 prec = 1; 3368 3369 String s = hexDouble(value, prec); 3370 3371 StringBuilder va = new StringBuilder(); 3372 boolean upper = f.contains(Flags.UPPERCASE); 3373 sb.append(upper ? "0X" : "0x"); 3374 3375 if (f.contains(Flags.ZERO_PAD)) { 3376 trailingZeros(sb, width - s.length() - 2); 3377 } 3378 3379 int idx = s.indexOf('p'); 3380 if (upper) { 3381 String tmp = s.substring(0, idx); 3382 // don't localize hex 3383 tmp = tmp.toUpperCase(Locale.US); 3384 va.append(tmp); 3385 } else { 3386 va.append(s, 0, idx); 3387 } 3388 if (prec != 0) { 3389 addZeros(va, prec); 3390 } 3391 sb.append(va); 3392 sb.append(upper ? 'P' : 'p'); 3393 sb.append(s, idx+1, s.length()); 3394 } 3395 } 3396 3397 // Add zeros to the requested precision. 3398 private void addZeros(StringBuilder sb, int prec) { 3399 // Look for the dot. If we don't find one, the we'll need to add 3400 // it before we add the zeros. 3401 int len = sb.length(); 3402 int i; 3403 for (i = 0; i < len; i++) { 3404 if (sb.charAt(i) == '.') { 3405 break; 3406 } 3407 } 3408 boolean needDot = false; 3409 if (i == len) { 3410 needDot = true; 3411 } 3412 3413 // Determine existing precision. 3414 int outPrec = len - i - (needDot ? 0 : 1); 3415 assert (outPrec <= prec); 3416 if (outPrec == prec) { 3417 return; 3418 } 3419 3420 // Add dot if previously determined to be necessary. 3421 if (needDot) { 3422 sb.append('.'); 3423 } 3424 3425 // Add zeros. 3426 trailingZeros(sb, prec - outPrec); 3427 } 3428 3429 // Method assumes that d > 0. 3430 private String hexDouble(double d, int prec) { 3431 // Let Double.toHexString handle simple cases 3432 if (!Double.isFinite(d) || d == 0.0 || prec == 0 || prec >= 13) { 3433 // remove "0x" 3434 return Double.toHexString(d).substring(2); 3435 } else { 3436 assert(prec >= 1 && prec <= 12); 3437 3438 int exponent = Math.getExponent(d); 3439 boolean subnormal 3440 = (exponent == DoubleConsts.MIN_EXPONENT - 1); 3441 3442 // If this is subnormal input so normalize (could be faster to 3443 // do as integer operation). 3444 if (subnormal) { 3445 scaleUp = Math.scalb(1.0, 54); 3446 d *= scaleUp; 3447 // Calculate the exponent. This is not just exponent + 54 3448 // since the former is not the normalized exponent. 3449 exponent = Math.getExponent(d); 3450 assert exponent >= DoubleConsts.MIN_EXPONENT && 3451 exponent <= DoubleConsts.MAX_EXPONENT: exponent; 3452 } 3453 3454 int precision = 1 + prec*4; 3455 int shiftDistance 3456 = DoubleConsts.SIGNIFICAND_WIDTH - precision; 3457 assert(shiftDistance >= 1 && shiftDistance < DoubleConsts.SIGNIFICAND_WIDTH); 3458 3459 long doppel = Double.doubleToLongBits(d); 3460 // Deterime the number of bits to keep. 3461 long newSignif 3462 = (doppel & (DoubleConsts.EXP_BIT_MASK 3463 | DoubleConsts.SIGNIF_BIT_MASK)) 3464 >> shiftDistance; 3465 // Bits to round away. 3466 long roundingBits = doppel & ~(~0L << shiftDistance); 3467 3468 // To decide how to round, look at the low-order bit of the 3469 // working significand, the highest order discarded bit (the 3470 // round bit) and whether any of the lower order discarded bits 3471 // are nonzero (the sticky bit). 3472 3473 boolean leastZero = (newSignif & 0x1L) == 0L; 3474 boolean round 3475 = ((1L << (shiftDistance - 1) ) & roundingBits) != 0L; 3476 boolean sticky = shiftDistance > 1 && 3477 (~(1L<< (shiftDistance - 1)) & roundingBits) != 0; 3478 if((leastZero && round && sticky) || (!leastZero && round)) { 3479 newSignif++; 3480 } 3481 3482 long signBit = doppel & DoubleConsts.SIGN_BIT_MASK; 3483 newSignif = signBit | (newSignif << shiftDistance); 3484 double result = Double.longBitsToDouble(newSignif); 3485 3486 if (Double.isInfinite(result) ) { 3487 // Infinite result generated by rounding 3488 return "1.0p1024"; 3489 } else { 3490 String res = Double.toHexString(result).substring(2); 3491 if (!subnormal) 3492 return res; 3493 else { 3494 // Create a normalized subnormal string. 3495 int idx = res.indexOf('p'); 3496 if (idx == -1) { 3497 // No 'p' character in hex string. 3498 assert false; 3499 return null; 3500 } else { 3501 // Get exponent and append at the end. 3502 String exp = res.substring(idx + 1); 3503 int iexp = Integer.parseInt(exp) -54; 3504 return res.substring(0, idx) + "p" 3505 + Integer.toString(iexp); 3506 } 3507 } 3508 } 3509 } 3510 } 3511 3512 private void print(BigDecimal value, Locale l) throws IOException { 3513 if (c == Conversion.HEXADECIMAL_FLOAT) 3514 failConversion(c, value); 3515 StringBuilder sb = new StringBuilder(); 3516 boolean neg = value.signum() == -1; 3517 BigDecimal v = value.abs(); 3518 // leading sign indicator 3519 leadingSign(sb, neg); 3520 3521 // the value 3522 print(sb, v, l, f, c, precision, neg); 3523 3524 // trailing sign indicator 3525 trailingSign(sb, neg); 3526 3527 // justify based on width 3528 appendJustified(a, sb); 3529 } 3530 3531 // value > 0 3532 private void print(StringBuilder sb, BigDecimal value, Locale l, 3533 Flags f, char c, int precision, boolean neg) 3534 throws IOException 3535 { 3536 if (c == Conversion.SCIENTIFIC) { 3537 // Create a new BigDecimal with the desired precision. 3538 int prec = (precision == -1 ? 6 : precision); 3539 int scale = value.scale(); 3540 int origPrec = value.precision(); 3541 int nzeros = 0; 3542 int compPrec; 3543 3544 if (prec > origPrec - 1) { 3545 compPrec = origPrec; 3546 nzeros = prec - (origPrec - 1); 3547 } else { 3548 compPrec = prec + 1; 3549 } 3550 3551 MathContext mc = new MathContext(compPrec); 3552 BigDecimal v 3553 = new BigDecimal(value.unscaledValue(), scale, mc); 3554 3555 BigDecimalLayout bdl 3556 = new BigDecimalLayout(v.unscaledValue(), v.scale(), 3557 BigDecimalLayoutForm.SCIENTIFIC); 3558 3559 StringBuilder mant = bdl.mantissa(); 3560 3561 // Add a decimal point if necessary. The mantissa may not 3562 // contain a decimal point if the scale is zero (the internal 3563 // representation has no fractional part) or the original 3564 // precision is one. Append a decimal point if '#' is set or if 3565 // we require zero padding to get to the requested precision. 3566 if ((origPrec == 1 || !bdl.hasDot()) 3567 && (nzeros > 0 || (f.contains(Flags.ALTERNATE)))) { 3568 mant.append('.'); 3569 } 3570 3571 // Add trailing zeros in the case precision is greater than 3572 // the number of available digits after the decimal separator. 3573 trailingZeros(mant, nzeros); 3574 3575 StringBuilder exp = bdl.exponent(); 3576 int newW = width; 3577 if (width != -1) { 3578 newW = adjustWidth(width - exp.length() - 1, f, neg); 3579 } 3580 localizedMagnitude(sb, mant, 0, f, newW, l); 3581 3582 sb.append(f.contains(Flags.UPPERCASE) ? 'E' : 'e'); 3583 3584 Flags flags = f.dup().remove(Flags.GROUP); 3585 char sign = exp.charAt(0); 3586 assert(sign == '+' || sign == '-'); 3587 sb.append(sign); 3588 3589 sb.append(localizedMagnitude(null, exp, 1, flags, -1, l)); 3590 } else if (c == Conversion.DECIMAL_FLOAT) { 3591 // Create a new BigDecimal with the desired precision. 3592 int prec = (precision == -1 ? 6 : precision); 3593 int scale = value.scale(); 3594 3595 if (scale > prec) { 3596 // more "scale" digits than the requested "precision" 3597 int compPrec = value.precision(); 3598 if (compPrec <= scale) { 3599 // case of 0.xxxxxx 3600 value = value.setScale(prec, RoundingMode.HALF_UP); 3601 } else { 3602 compPrec -= (scale - prec); 3603 value = new BigDecimal(value.unscaledValue(), 3604 scale, 3605 new MathContext(compPrec)); 3606 } 3607 } 3608 BigDecimalLayout bdl = new BigDecimalLayout( 3609 value.unscaledValue(), 3610 value.scale(), 3611 BigDecimalLayoutForm.DECIMAL_FLOAT); 3612 3613 StringBuilder mant = bdl.mantissa(); 3614 int nzeros = (bdl.scale() < prec ? prec - bdl.scale() : 0); 3615 3616 // Add a decimal point if necessary. The mantissa may not 3617 // contain a decimal point if the scale is zero (the internal 3618 // representation has no fractional part). Append a decimal 3619 // point if '#' is set or we require zero padding to get to the 3620 // requested precision. 3621 if (bdl.scale() == 0 && (f.contains(Flags.ALTERNATE) 3622 || nzeros > 0)) { 3623 mant.append('.'); 3624 } 3625 3626 // Add trailing zeros if the precision is greater than the 3627 // number of available digits after the decimal separator. 3628 trailingZeros(mant, nzeros); 3629 3630 localizedMagnitude(sb, mant, 0, f, adjustWidth(width, f, neg), l); 3631 } else if (c == Conversion.GENERAL) { 3632 int prec = precision; 3633 if (precision == -1) 3634 prec = 6; 3635 else if (precision == 0) 3636 prec = 1; 3637 3638 BigDecimal tenToTheNegFour = BigDecimal.valueOf(1, 4); 3639 BigDecimal tenToThePrec = BigDecimal.valueOf(1, -prec); 3640 if ((value.equals(BigDecimal.ZERO)) 3641 || ((value.compareTo(tenToTheNegFour) != -1) 3642 && (value.compareTo(tenToThePrec) == -1))) { 3643 3644 int e = - value.scale() 3645 + (value.unscaledValue().toString().length() - 1); 3646 3647 // xxx.yyy 3648 // g precision (# sig digits) = #x + #y 3649 // f precision = #y 3650 // exponent = #x - 1 3651 // => f precision = g precision - exponent - 1 3652 // 0.000zzz 3653 // g precision (# sig digits) = #z 3654 // f precision = #0 (after '.') + #z 3655 // exponent = - #0 (after '.') - 1 3656 // => f precision = g precision - exponent - 1 3657 prec = prec - e - 1; 3658 3659 print(sb, value, l, f, Conversion.DECIMAL_FLOAT, prec, 3660 neg); 3661 } else { 3662 print(sb, value, l, f, Conversion.SCIENTIFIC, prec - 1, neg); 3663 } 3664 } else if (c == Conversion.HEXADECIMAL_FLOAT) { 3665 // This conversion isn't supported. The error should be 3666 // reported earlier. 3667 assert false; 3668 } 3669 } 3670 3671 private class BigDecimalLayout { 3672 private StringBuilder mant; 3673 private StringBuilder exp; 3674 private boolean dot = false; 3675 private int scale; 3676 3677 public BigDecimalLayout(BigInteger intVal, int scale, BigDecimalLayoutForm form) { 3678 layout(intVal, scale, form); 3679 } 3680 3681 public boolean hasDot() { 3682 return dot; 3683 } 3684 3685 public int scale() { 3686 return scale; 3687 } 3688 3689 public StringBuilder mantissa() { 3690 return mant; 3691 } 3692 3693 // The exponent will be formatted as a sign ('+' or '-') followed 3694 // by the exponent zero-padded to include at least two digits. 3695 public StringBuilder exponent() { 3696 return exp; 3697 } 3698 3699 private void layout(BigInteger intVal, int scale, BigDecimalLayoutForm form) { 3700 String coeff = intVal.toString(); 3701 this.scale = scale; 3702 3703 // Construct a buffer, with sufficient capacity for all cases. 3704 // If E-notation is needed, length will be: +1 if negative, +1 3705 // if '.' needed, +2 for "E+", + up to 10 for adjusted 3706 // exponent. Otherwise it could have +1 if negative, plus 3707 // leading "0.00000" 3708 int len = coeff.length(); 3709 mant = new StringBuilder(len + 14); 3710 3711 if (scale == 0) { 3712 if (len > 1) { 3713 mant.append(coeff.charAt(0)); 3714 if (form == BigDecimalLayoutForm.SCIENTIFIC) { 3715 mant.append('.'); 3716 dot = true; 3717 mant.append(coeff, 1, len); 3718 exp = new StringBuilder("+"); 3719 if (len < 10) { 3720 exp.append('0').append(len - 1); 3721 } else { 3722 exp.append(len - 1); 3723 } 3724 } else { 3725 mant.append(coeff, 1, len); 3726 } 3727 } else { 3728 mant.append(coeff); 3729 if (form == BigDecimalLayoutForm.SCIENTIFIC) { 3730 exp = new StringBuilder("+00"); 3731 } 3732 } 3733 return; 3734 } 3735 long adjusted = -(long) scale + (len - 1); 3736 if (form == BigDecimalLayoutForm.DECIMAL_FLOAT) { 3737 // count of padding zeros 3738 int pad = scale - len; 3739 if (pad >= 0) { 3740 // 0.xxx form 3741 mant.append("0."); 3742 dot = true; 3743 trailingZeros(mant, pad); 3744 mant.append(coeff); 3745 } else { 3746 if (-pad < len) { 3747 // xx.xx form 3748 mant.append(coeff, 0, -pad); 3749 mant.append('.'); 3750 dot = true; 3751 mant.append(coeff, -pad, -pad + scale); 3752 } else { 3753 // xx form 3754 mant.append(coeff, 0, len); 3755 trailingZeros(mant, -scale); 3756 this.scale = 0; 3757 } 3758 } 3759 } else { 3760 // x.xxx form 3761 mant.append(coeff.charAt(0)); 3762 if (len > 1) { 3763 mant.append('.'); 3764 dot = true; 3765 mant.append(coeff, 1, len); 3766 } 3767 exp = new StringBuilder(); 3768 if (adjusted != 0) { 3769 long abs = Math.abs(adjusted); 3770 // require sign 3771 exp.append(adjusted < 0 ? '-' : '+'); 3772 if (abs < 10) { 3773 exp.append('0'); 3774 } 3775 exp.append(abs); 3776 } else { 3777 exp.append("+00"); 3778 } 3779 } 3780 } 3781 } 3782 3783 private int adjustWidth(int width, Flags f, boolean neg) { 3784 int newW = width; 3785 if (newW != -1 && neg && f.contains(Flags.PARENTHESES)) 3786 newW--; 3787 return newW; 3788 } 3789 3790 // Add trailing zeros 3791 private void trailingZeros(StringBuilder sb, int nzeros) { 3792 for (int i = 0; i < nzeros; i++) { 3793 sb.append('0'); 3794 } 3795 } 3796 3797 private void print(Calendar t, char c, Locale l) throws IOException { 3798 StringBuilder sb = new StringBuilder(); 3799 print(sb, t, c, l); 3800 3801 // justify based on width 3802 if (f.contains(Flags.UPPERCASE)) { 3803 appendJustified(a, sb.toString().toUpperCase()); 3804 } else { 3805 appendJustified(a, sb); 3806 } 3807 } 3808 3809 private Appendable print(StringBuilder sb, Calendar t, char c, Locale l) 3810 throws IOException { 3811 if (sb == null) 3812 sb = new StringBuilder(); 3813 switch (c) { 3814 case DateTime.HOUR_OF_DAY_0: // 'H' (00 - 23) 3815 case DateTime.HOUR_0: // 'I' (01 - 12) 3816 case DateTime.HOUR_OF_DAY: // 'k' (0 - 23) -- like H 3817 case DateTime.HOUR: { // 'l' (1 - 12) -- like I 3818 int i = t.get(Calendar.HOUR_OF_DAY); 3819 if (c == DateTime.HOUR_0 || c == DateTime.HOUR) 3820 i = (i == 0 || i == 12 ? 12 : i % 12); 3821 Flags flags = (c == DateTime.HOUR_OF_DAY_0 3822 || c == DateTime.HOUR_0 3823 ? Flags.ZERO_PAD 3824 : Flags.NONE); 3825 sb.append(localizedMagnitude(null, i, flags, 2, l)); 3826 break; 3827 } 3828 case DateTime.MINUTE: { // 'M' (00 - 59) 3829 int i = t.get(Calendar.MINUTE); 3830 Flags flags = Flags.ZERO_PAD; 3831 sb.append(localizedMagnitude(null, i, flags, 2, l)); 3832 break; 3833 } 3834 case DateTime.NANOSECOND: { // 'N' (000000000 - 999999999) 3835 int i = t.get(Calendar.MILLISECOND) * 1000000; 3836 Flags flags = Flags.ZERO_PAD; 3837 sb.append(localizedMagnitude(null, i, flags, 9, l)); 3838 break; 3839 } 3840 case DateTime.MILLISECOND: { // 'L' (000 - 999) 3841 int i = t.get(Calendar.MILLISECOND); 3842 Flags flags = Flags.ZERO_PAD; 3843 sb.append(localizedMagnitude(null, i, flags, 3, l)); 3844 break; 3845 } 3846 case DateTime.MILLISECOND_SINCE_EPOCH: { // 'Q' (0 - 99...?) 3847 long i = t.getTimeInMillis(); 3848 Flags flags = Flags.NONE; 3849 sb.append(localizedMagnitude(null, i, flags, width, l)); 3850 break; 3851 } 3852 case DateTime.AM_PM: { // 'p' (am or pm) 3853 // Calendar.AM = 0, Calendar.PM = 1, LocaleElements defines upper 3854 String[] ampm = { "AM", "PM" }; 3855 if (l != null && l != Locale.US) { 3856 DateFormatSymbols dfs = DateFormatSymbols.getInstance(l); 3857 ampm = dfs.getAmPmStrings(); 3858 } 3859 String s = ampm[t.get(Calendar.AM_PM)]; 3860 sb.append(s.toLowerCase(l != null ? l : Locale.US)); 3861 break; 3862 } 3863 case DateTime.SECONDS_SINCE_EPOCH: { // 's' (0 - 99...?) 3864 long i = t.getTimeInMillis() / 1000; 3865 Flags flags = Flags.NONE; 3866 sb.append(localizedMagnitude(null, i, flags, width, l)); 3867 break; 3868 } 3869 case DateTime.SECOND: { // 'S' (00 - 60 - leap second) 3870 int i = t.get(Calendar.SECOND); 3871 Flags flags = Flags.ZERO_PAD; 3872 sb.append(localizedMagnitude(null, i, flags, 2, l)); 3873 break; 3874 } 3875 case DateTime.ZONE_NUMERIC: { // 'z' ({-|+}####) - ls minus? 3876 int i = t.get(Calendar.ZONE_OFFSET) + t.get(Calendar.DST_OFFSET); 3877 boolean neg = i < 0; 3878 sb.append(neg ? '-' : '+'); 3879 if (neg) 3880 i = -i; 3881 int min = i / 60000; 3882 // combine minute and hour into a single integer 3883 int offset = (min / 60) * 100 + (min % 60); 3884 Flags flags = Flags.ZERO_PAD; 3885 3886 sb.append(localizedMagnitude(null, offset, flags, 4, l)); 3887 break; 3888 } 3889 case DateTime.ZONE: { // 'Z' (symbol) 3890 TimeZone tz = t.getTimeZone(); 3891 sb.append(tz.getDisplayName((t.get(Calendar.DST_OFFSET) != 0), 3892 TimeZone.SHORT, 3893 (l == null) ? Locale.US : l)); 3894 break; 3895 } 3896 3897 // Date 3898 case DateTime.NAME_OF_DAY_ABBREV: // 'a' 3899 case DateTime.NAME_OF_DAY: { // 'A' 3900 int i = t.get(Calendar.DAY_OF_WEEK); 3901 Locale lt = ((l == null) ? Locale.US : l); 3902 DateFormatSymbols dfs = DateFormatSymbols.getInstance(lt); 3903 if (c == DateTime.NAME_OF_DAY) 3904 sb.append(dfs.getWeekdays()[i]); 3905 else 3906 sb.append(dfs.getShortWeekdays()[i]); 3907 break; 3908 } 3909 case DateTime.NAME_OF_MONTH_ABBREV: // 'b' 3910 case DateTime.NAME_OF_MONTH_ABBREV_X: // 'h' -- same b 3911 case DateTime.NAME_OF_MONTH: { // 'B' 3912 int i = t.get(Calendar.MONTH); 3913 Locale lt = ((l == null) ? Locale.US : l); 3914 DateFormatSymbols dfs = DateFormatSymbols.getInstance(lt); 3915 if (c == DateTime.NAME_OF_MONTH) 3916 sb.append(dfs.getMonths()[i]); 3917 else 3918 sb.append(dfs.getShortMonths()[i]); 3919 break; 3920 } 3921 case DateTime.CENTURY: // 'C' (00 - 99) 3922 case DateTime.YEAR_2: // 'y' (00 - 99) 3923 case DateTime.YEAR_4: { // 'Y' (0000 - 9999) 3924 int i = t.get(Calendar.YEAR); 3925 int size = 2; 3926 switch (c) { 3927 case DateTime.CENTURY: 3928 i /= 100; 3929 break; 3930 case DateTime.YEAR_2: 3931 i %= 100; 3932 break; 3933 case DateTime.YEAR_4: 3934 size = 4; 3935 break; 3936 } 3937 Flags flags = Flags.ZERO_PAD; 3938 sb.append(localizedMagnitude(null, i, flags, size, l)); 3939 break; 3940 } 3941 case DateTime.DAY_OF_MONTH_0: // 'd' (01 - 31) 3942 case DateTime.DAY_OF_MONTH: { // 'e' (1 - 31) -- like d 3943 int i = t.get(Calendar.DATE); 3944 Flags flags = (c == DateTime.DAY_OF_MONTH_0 3945 ? Flags.ZERO_PAD 3946 : Flags.NONE); 3947 sb.append(localizedMagnitude(null, i, flags, 2, l)); 3948 break; 3949 } 3950 case DateTime.DAY_OF_YEAR: { // 'j' (001 - 366) 3951 int i = t.get(Calendar.DAY_OF_YEAR); 3952 Flags flags = Flags.ZERO_PAD; 3953 sb.append(localizedMagnitude(null, i, flags, 3, l)); 3954 break; 3955 } 3956 case DateTime.MONTH: { // 'm' (01 - 12) 3957 int i = t.get(Calendar.MONTH) + 1; 3958 Flags flags = Flags.ZERO_PAD; 3959 sb.append(localizedMagnitude(null, i, flags, 2, l)); 3960 break; 3961 } 3962 3963 // Composites 3964 case DateTime.TIME: // 'T' (24 hour hh:mm:ss - %tH:%tM:%tS) 3965 case DateTime.TIME_24_HOUR: { // 'R' (hh:mm same as %H:%M) 3966 char sep = ':'; 3967 print(sb, t, DateTime.HOUR_OF_DAY_0, l).append(sep); 3968 print(sb, t, DateTime.MINUTE, l); 3969 if (c == DateTime.TIME) { 3970 sb.append(sep); 3971 print(sb, t, DateTime.SECOND, l); 3972 } 3973 break; 3974 } 3975 case DateTime.TIME_12_HOUR: { // 'r' (hh:mm:ss [AP]M) 3976 char sep = ':'; 3977 print(sb, t, DateTime.HOUR_0, l).append(sep); 3978 print(sb, t, DateTime.MINUTE, l).append(sep); 3979 print(sb, t, DateTime.SECOND, l).append(' '); 3980 // this may be in wrong place for some locales 3981 StringBuilder tsb = new StringBuilder(); 3982 print(tsb, t, DateTime.AM_PM, l); 3983 3984 sb.append(tsb.toString().toUpperCase(l != null ? l : Locale.US)); 3985 break; 3986 } 3987 case DateTime.DATE_TIME: { // 'c' (Sat Nov 04 12:02:33 EST 1999) 3988 char sep = ' '; 3989 print(sb, t, DateTime.NAME_OF_DAY_ABBREV, l).append(sep); 3990 print(sb, t, DateTime.NAME_OF_MONTH_ABBREV, l).append(sep); 3991 print(sb, t, DateTime.DAY_OF_MONTH_0, l).append(sep); 3992 print(sb, t, DateTime.TIME, l).append(sep); 3993 print(sb, t, DateTime.ZONE, l).append(sep); 3994 print(sb, t, DateTime.YEAR_4, l); 3995 break; 3996 } 3997 case DateTime.DATE: { // 'D' (mm/dd/yy) 3998 char sep = '/'; 3999 print(sb, t, DateTime.MONTH, l).append(sep); 4000 print(sb, t, DateTime.DAY_OF_MONTH_0, l).append(sep); 4001 print(sb, t, DateTime.YEAR_2, l); 4002 break; 4003 } 4004 case DateTime.ISO_STANDARD_DATE: { // 'F' (%Y-%m-%d) 4005 char sep = '-'; 4006 print(sb, t, DateTime.YEAR_4, l).append(sep); 4007 print(sb, t, DateTime.MONTH, l).append(sep); 4008 print(sb, t, DateTime.DAY_OF_MONTH_0, l); 4009 break; 4010 } 4011 default: 4012 assert false; 4013 } 4014 return sb; 4015 } 4016 4017 private void print(TemporalAccessor t, char c, Locale l) throws IOException { 4018 StringBuilder sb = new StringBuilder(); 4019 print(sb, t, c, l); 4020 // justify based on width 4021 if (f.contains(Flags.UPPERCASE)) { 4022 appendJustified(a, sb.toString().toUpperCase()); 4023 } else { 4024 appendJustified(a, sb); 4025 } 4026 } 4027 4028 private Appendable print(StringBuilder sb, TemporalAccessor t, char c, 4029 Locale l) throws IOException { 4030 if (sb == null) 4031 sb = new StringBuilder(); 4032 try { 4033 switch (c) { 4034 case DateTime.HOUR_OF_DAY_0: { // 'H' (00 - 23) 4035 int i = t.get(ChronoField.HOUR_OF_DAY); 4036 sb.append(localizedMagnitude(null, i, Flags.ZERO_PAD, 2, l)); 4037 break; 4038 } 4039 case DateTime.HOUR_OF_DAY: { // 'k' (0 - 23) -- like H 4040 int i = t.get(ChronoField.HOUR_OF_DAY); 4041 sb.append(localizedMagnitude(null, i, Flags.NONE, 2, l)); 4042 break; 4043 } 4044 case DateTime.HOUR_0: { // 'I' (01 - 12) 4045 int i = t.get(ChronoField.CLOCK_HOUR_OF_AMPM); 4046 sb.append(localizedMagnitude(null, i, Flags.ZERO_PAD, 2, l)); 4047 break; 4048 } 4049 case DateTime.HOUR: { // 'l' (1 - 12) -- like I 4050 int i = t.get(ChronoField.CLOCK_HOUR_OF_AMPM); 4051 sb.append(localizedMagnitude(null, i, Flags.NONE, 2, l)); 4052 break; 4053 } 4054 case DateTime.MINUTE: { // 'M' (00 - 59) 4055 int i = t.get(ChronoField.MINUTE_OF_HOUR); 4056 Flags flags = Flags.ZERO_PAD; 4057 sb.append(localizedMagnitude(null, i, flags, 2, l)); 4058 break; 4059 } 4060 case DateTime.NANOSECOND: { // 'N' (000000000 - 999999999) 4061 int i = t.get(ChronoField.MILLI_OF_SECOND) * 1000000; 4062 Flags flags = Flags.ZERO_PAD; 4063 sb.append(localizedMagnitude(null, i, flags, 9, l)); 4064 break; 4065 } 4066 case DateTime.MILLISECOND: { // 'L' (000 - 999) 4067 int i = t.get(ChronoField.MILLI_OF_SECOND); 4068 Flags flags = Flags.ZERO_PAD; 4069 sb.append(localizedMagnitude(null, i, flags, 3, l)); 4070 break; 4071 } 4072 case DateTime.MILLISECOND_SINCE_EPOCH: { // 'Q' (0 - 99...?) 4073 long i = t.getLong(ChronoField.INSTANT_SECONDS) * 1000L + 4074 t.getLong(ChronoField.MILLI_OF_SECOND); 4075 Flags flags = Flags.NONE; 4076 sb.append(localizedMagnitude(null, i, flags, width, l)); 4077 break; 4078 } 4079 case DateTime.AM_PM: { // 'p' (am or pm) 4080 // Calendar.AM = 0, Calendar.PM = 1, LocaleElements defines upper 4081 String[] ampm = { "AM", "PM" }; 4082 if (l != null && l != Locale.US) { 4083 DateFormatSymbols dfs = DateFormatSymbols.getInstance(l); 4084 ampm = dfs.getAmPmStrings(); 4085 } 4086 String s = ampm[t.get(ChronoField.AMPM_OF_DAY)]; 4087 sb.append(s.toLowerCase(l != null ? l : Locale.US)); 4088 break; 4089 } 4090 case DateTime.SECONDS_SINCE_EPOCH: { // 's' (0 - 99...?) 4091 long i = t.getLong(ChronoField.INSTANT_SECONDS); 4092 Flags flags = Flags.NONE; 4093 sb.append(localizedMagnitude(null, i, flags, width, l)); 4094 break; 4095 } 4096 case DateTime.SECOND: { // 'S' (00 - 60 - leap second) 4097 int i = t.get(ChronoField.SECOND_OF_MINUTE); 4098 Flags flags = Flags.ZERO_PAD; 4099 sb.append(localizedMagnitude(null, i, flags, 2, l)); 4100 break; 4101 } 4102 case DateTime.ZONE_NUMERIC: { // 'z' ({-|+}####) - ls minus? 4103 int i = t.get(ChronoField.OFFSET_SECONDS); 4104 boolean neg = i < 0; 4105 sb.append(neg ? '-' : '+'); 4106 if (neg) 4107 i = -i; 4108 int min = i / 60; 4109 // combine minute and hour into a single integer 4110 int offset = (min / 60) * 100 + (min % 60); 4111 Flags flags = Flags.ZERO_PAD; 4112 sb.append(localizedMagnitude(null, offset, flags, 4, l)); 4113 break; 4114 } 4115 case DateTime.ZONE: { // 'Z' (symbol) 4116 ZoneId zid = t.query(TemporalQueries.zone()); 4117 if (zid == null) { 4118 throw new IllegalFormatConversionException(c, t.getClass()); 4119 } 4120 if (!(zid instanceof ZoneOffset) && 4121 t.isSupported(ChronoField.INSTANT_SECONDS)) { 4122 Instant instant = Instant.from(t); 4123 sb.append(TimeZone.getTimeZone(zid.getId()) 4124 .getDisplayName(zid.getRules().isDaylightSavings(instant), 4125 TimeZone.SHORT, 4126 (l == null) ? Locale.US : l)); 4127 break; 4128 } 4129 sb.append(zid.getId()); 4130 break; 4131 } 4132 // Date 4133 case DateTime.NAME_OF_DAY_ABBREV: // 'a' 4134 case DateTime.NAME_OF_DAY: { // 'A' 4135 int i = t.get(ChronoField.DAY_OF_WEEK) % 7 + 1; 4136 Locale lt = ((l == null) ? Locale.US : l); 4137 DateFormatSymbols dfs = DateFormatSymbols.getInstance(lt); 4138 if (c == DateTime.NAME_OF_DAY) 4139 sb.append(dfs.getWeekdays()[i]); 4140 else 4141 sb.append(dfs.getShortWeekdays()[i]); 4142 break; 4143 } 4144 case DateTime.NAME_OF_MONTH_ABBREV: // 'b' 4145 case DateTime.NAME_OF_MONTH_ABBREV_X: // 'h' -- same b 4146 case DateTime.NAME_OF_MONTH: { // 'B' 4147 int i = t.get(ChronoField.MONTH_OF_YEAR) - 1; 4148 Locale lt = ((l == null) ? Locale.US : l); 4149 DateFormatSymbols dfs = DateFormatSymbols.getInstance(lt); 4150 if (c == DateTime.NAME_OF_MONTH) 4151 sb.append(dfs.getMonths()[i]); 4152 else 4153 sb.append(dfs.getShortMonths()[i]); 4154 break; 4155 } 4156 case DateTime.CENTURY: // 'C' (00 - 99) 4157 case DateTime.YEAR_2: // 'y' (00 - 99) 4158 case DateTime.YEAR_4: { // 'Y' (0000 - 9999) 4159 int i = t.get(ChronoField.YEAR_OF_ERA); 4160 int size = 2; 4161 switch (c) { 4162 case DateTime.CENTURY: 4163 i /= 100; 4164 break; 4165 case DateTime.YEAR_2: 4166 i %= 100; 4167 break; 4168 case DateTime.YEAR_4: 4169 size = 4; 4170 break; 4171 } 4172 Flags flags = Flags.ZERO_PAD; 4173 sb.append(localizedMagnitude(null, i, flags, size, l)); 4174 break; 4175 } 4176 case DateTime.DAY_OF_MONTH_0: // 'd' (01 - 31) 4177 case DateTime.DAY_OF_MONTH: { // 'e' (1 - 31) -- like d 4178 int i = t.get(ChronoField.DAY_OF_MONTH); 4179 Flags flags = (c == DateTime.DAY_OF_MONTH_0 4180 ? Flags.ZERO_PAD 4181 : Flags.NONE); 4182 sb.append(localizedMagnitude(null, i, flags, 2, l)); 4183 break; 4184 } 4185 case DateTime.DAY_OF_YEAR: { // 'j' (001 - 366) 4186 int i = t.get(ChronoField.DAY_OF_YEAR); 4187 Flags flags = Flags.ZERO_PAD; 4188 sb.append(localizedMagnitude(null, i, flags, 3, l)); 4189 break; 4190 } 4191 case DateTime.MONTH: { // 'm' (01 - 12) 4192 int i = t.get(ChronoField.MONTH_OF_YEAR); 4193 Flags flags = Flags.ZERO_PAD; 4194 sb.append(localizedMagnitude(null, i, flags, 2, l)); 4195 break; 4196 } 4197 4198 // Composites 4199 case DateTime.TIME: // 'T' (24 hour hh:mm:ss - %tH:%tM:%tS) 4200 case DateTime.TIME_24_HOUR: { // 'R' (hh:mm same as %H:%M) 4201 char sep = ':'; 4202 print(sb, t, DateTime.HOUR_OF_DAY_0, l).append(sep); 4203 print(sb, t, DateTime.MINUTE, l); 4204 if (c == DateTime.TIME) { 4205 sb.append(sep); 4206 print(sb, t, DateTime.SECOND, l); 4207 } 4208 break; 4209 } 4210 case DateTime.TIME_12_HOUR: { // 'r' (hh:mm:ss [AP]M) 4211 char sep = ':'; 4212 print(sb, t, DateTime.HOUR_0, l).append(sep); 4213 print(sb, t, DateTime.MINUTE, l).append(sep); 4214 print(sb, t, DateTime.SECOND, l).append(' '); 4215 // this may be in wrong place for some locales 4216 StringBuilder tsb = new StringBuilder(); 4217 print(tsb, t, DateTime.AM_PM, l); 4218 sb.append(tsb.toString().toUpperCase(l != null ? l : Locale.US)); 4219 break; 4220 } 4221 case DateTime.DATE_TIME: { // 'c' (Sat Nov 04 12:02:33 EST 1999) 4222 char sep = ' '; 4223 print(sb, t, DateTime.NAME_OF_DAY_ABBREV, l).append(sep); 4224 print(sb, t, DateTime.NAME_OF_MONTH_ABBREV, l).append(sep); 4225 print(sb, t, DateTime.DAY_OF_MONTH_0, l).append(sep); 4226 print(sb, t, DateTime.TIME, l).append(sep); 4227 print(sb, t, DateTime.ZONE, l).append(sep); 4228 print(sb, t, DateTime.YEAR_4, l); 4229 break; 4230 } 4231 case DateTime.DATE: { // 'D' (mm/dd/yy) 4232 char sep = '/'; 4233 print(sb, t, DateTime.MONTH, l).append(sep); 4234 print(sb, t, DateTime.DAY_OF_MONTH_0, l).append(sep); 4235 print(sb, t, DateTime.YEAR_2, l); 4236 break; 4237 } 4238 case DateTime.ISO_STANDARD_DATE: { // 'F' (%Y-%m-%d) 4239 char sep = '-'; 4240 print(sb, t, DateTime.YEAR_4, l).append(sep); 4241 print(sb, t, DateTime.MONTH, l).append(sep); 4242 print(sb, t, DateTime.DAY_OF_MONTH_0, l); 4243 break; 4244 } 4245 default: 4246 assert false; 4247 } 4248 } catch (DateTimeException x) { 4249 throw new IllegalFormatConversionException(c, t.getClass()); 4250 } 4251 return sb; 4252 } 4253 4254 // -- Methods to support throwing exceptions -- 4255 4256 private void failMismatch(Flags f, char c) { 4257 String fs = f.toString(); 4258 throw new FormatFlagsConversionMismatchException(fs, c); 4259 } 4260 4261 private void failConversion(char c, Object arg) { 4262 throw new IllegalFormatConversionException(c, arg.getClass()); 4263 } 4264 4265 private char getZero(Locale l) { 4266 if ((l != null) && !l.equals(locale())) { 4267 DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(l); 4268 return dfs.getZeroDigit(); 4269 } 4270 return zero; 4271 } 4272 4273 private StringBuilder localizedMagnitude(StringBuilder sb, 4274 long value, Flags f, int width, Locale l) { 4275 return localizedMagnitude(sb, Long.toString(value, 10), 0, f, width, l); 4276 } 4277 4278 private StringBuilder localizedMagnitude(StringBuilder sb, 4279 CharSequence value, final int offset, Flags f, int width, 4280 Locale l) { 4281 if (sb == null) { 4282 sb = new StringBuilder(); 4283 } 4284 int begin = sb.length(); 4285 4286 char zero = getZero(l); 4287 4288 // determine localized grouping separator and size 4289 char grpSep = '\0'; 4290 int grpSize = -1; 4291 char decSep = '\0'; 4292 4293 int len = value.length(); 4294 int dot = len; 4295 for (int j = offset; j < len; j++) { 4296 if (value.charAt(j) == '.') { 4297 dot = j; 4298 break; 4299 } 4300 } 4301 4302 if (dot < len) { 4303 if (l == null || l.equals(Locale.US)) { 4304 decSep = '.'; 4305 } else { 4306 DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(l); 4307 decSep = dfs.getDecimalSeparator(); 4308 } 4309 } 4310 4311 if (f.contains(Flags.GROUP)) { 4312 if (l == null || l.equals(Locale.US)) { 4313 grpSep = ','; 4314 grpSize = 3; 4315 } else { 4316 DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(l); 4317 grpSep = dfs.getGroupingSeparator(); 4318 DecimalFormat df = (DecimalFormat) NumberFormat.getIntegerInstance(l); 4319 grpSize = df.getGroupingSize(); 4320 } 4321 } 4322 4323 // localize the digits inserting group separators as necessary 4324 for (int j = offset; j < len; j++) { 4325 if (j == dot) { 4326 sb.append(decSep); 4327 // no more group separators after the decimal separator 4328 grpSep = '\0'; 4329 continue; 4330 } 4331 4332 char c = value.charAt(j); 4333 sb.append((char) ((c - '0') + zero)); 4334 if (grpSep != '\0' && j != dot - 1 && ((dot - j) % grpSize == 1)) { 4335 sb.append(grpSep); 4336 } 4337 } 4338 4339 // apply zero padding 4340 if (width != -1 && f.contains(Flags.ZERO_PAD)) { 4341 for (int k = sb.length(); k < width; k++) { 4342 sb.insert(begin, zero); 4343 } 4344 } 4345 4346 return sb; 4347 } 4348 } 4349 4350 // Specialized localization of exponents, where the source value can only 4351 // contain characters '0' through '9', starting at index offset, and no 4352 // group separators is added for any locale. 4353 private void localizedMagnitudeExp(StringBuilder sb, char[] value, 4354 final int offset, Locale l) { 4355 char zero = getZero(l); 4356 4357 int len = value.length; 4358 for (int j = offset; j < len; j++) { 4359 char c = value[j]; 4360 sb.append((char) ((c - '0') + zero)); 4361 } 4362 } 4363 4364 private static class Flags { 4365 private int flags; 4366 4367 static final Flags NONE = new Flags(0); // '' 4368 4369 // duplicate declarations from Formattable.java 4370 static final Flags LEFT_JUSTIFY = new Flags(1<<0); // '-' 4371 static final Flags UPPERCASE = new Flags(1<<1); // '^' 4372 static final Flags ALTERNATE = new Flags(1<<2); // '#' 4373 4374 // numerics 4375 static final Flags PLUS = new Flags(1<<3); // '+' 4376 static final Flags LEADING_SPACE = new Flags(1<<4); // ' ' 4377 static final Flags ZERO_PAD = new Flags(1<<5); // '0' 4378 static final Flags GROUP = new Flags(1<<6); // ',' 4379 static final Flags PARENTHESES = new Flags(1<<7); // '(' 4380 4381 // indexing 4382 static final Flags PREVIOUS = new Flags(1<<8); // '<' 4383 4384 private Flags(int f) { 4385 flags = f; 4386 } 4387 4388 public int valueOf() { 4389 return flags; 4390 } 4391 4392 public boolean contains(Flags f) { 4393 return (flags & f.valueOf()) == f.valueOf(); 4394 } 4395 4396 public Flags dup() { 4397 return new Flags(flags); 4398 } 4399 4400 private Flags add(Flags f) { 4401 flags |= f.valueOf(); 4402 return this; 4403 } 4404 4405 public Flags remove(Flags f) { 4406 flags &= ~f.valueOf(); 4407 return this; 4408 } 4409 4410 public static Flags parse(String s, int start, int end) { 4411 Flags f = new Flags(0); 4412 for (int i = start; i < end; i++) { 4413 char c = s.charAt(i); 4414 Flags v = parse(c); 4415 if (f.contains(v)) 4416 throw new DuplicateFormatFlagsException(v.toString()); 4417 f.add(v); 4418 } 4419 return f; 4420 } 4421 4422 // parse those flags which may be provided by users 4423 private static Flags parse(char c) { 4424 switch (c) { 4425 case '-': return LEFT_JUSTIFY; 4426 case '#': return ALTERNATE; 4427 case '+': return PLUS; 4428 case ' ': return LEADING_SPACE; 4429 case '0': return ZERO_PAD; 4430 case ',': return GROUP; 4431 case '(': return PARENTHESES; 4432 case '<': return PREVIOUS; 4433 default: 4434 throw new UnknownFormatFlagsException(String.valueOf(c)); 4435 } 4436 } 4437 4438 // Returns a string representation of the current {@code Flags}. 4439 public static String toString(Flags f) { 4440 return f.toString(); 4441 } 4442 4443 public String toString() { 4444 StringBuilder sb = new StringBuilder(); 4445 if (contains(LEFT_JUSTIFY)) sb.append('-'); 4446 if (contains(UPPERCASE)) sb.append('^'); 4447 if (contains(ALTERNATE)) sb.append('#'); 4448 if (contains(PLUS)) sb.append('+'); 4449 if (contains(LEADING_SPACE)) sb.append(' '); 4450 if (contains(ZERO_PAD)) sb.append('0'); 4451 if (contains(GROUP)) sb.append(','); 4452 if (contains(PARENTHESES)) sb.append('('); 4453 if (contains(PREVIOUS)) sb.append('<'); 4454 return sb.toString(); 4455 } 4456 } 4457 4458 private static class Conversion { 4459 // Byte, Short, Integer, Long, BigInteger 4460 // (and associated primitives due to autoboxing) 4461 static final char DECIMAL_INTEGER = 'd'; 4462 static final char OCTAL_INTEGER = 'o'; 4463 static final char HEXADECIMAL_INTEGER = 'x'; 4464 static final char HEXADECIMAL_INTEGER_UPPER = 'X'; 4465 4466 // Float, Double, BigDecimal 4467 // (and associated primitives due to autoboxing) 4468 static final char SCIENTIFIC = 'e'; 4469 static final char SCIENTIFIC_UPPER = 'E'; 4470 static final char GENERAL = 'g'; 4471 static final char GENERAL_UPPER = 'G'; 4472 static final char DECIMAL_FLOAT = 'f'; 4473 static final char HEXADECIMAL_FLOAT = 'a'; 4474 static final char HEXADECIMAL_FLOAT_UPPER = 'A'; 4475 4476 // Character, Byte, Short, Integer 4477 // (and associated primitives due to autoboxing) 4478 static final char CHARACTER = 'c'; 4479 static final char CHARACTER_UPPER = 'C'; 4480 4481 // java.util.Date, java.util.Calendar, long 4482 static final char DATE_TIME = 't'; 4483 static final char DATE_TIME_UPPER = 'T'; 4484 4485 // if (arg.TYPE != boolean) return boolean 4486 // if (arg != null) return true; else return false; 4487 static final char BOOLEAN = 'b'; 4488 static final char BOOLEAN_UPPER = 'B'; 4489 // if (arg instanceof Formattable) arg.formatTo() 4490 // else arg.toString(); 4491 static final char STRING = 's'; 4492 static final char STRING_UPPER = 'S'; 4493 // arg.hashCode() 4494 static final char HASHCODE = 'h'; 4495 static final char HASHCODE_UPPER = 'H'; 4496 4497 static final char LINE_SEPARATOR = 'n'; 4498 static final char PERCENT_SIGN = '%'; 4499 4500 static boolean isValid(char c) { 4501 return (isGeneral(c) || isInteger(c) || isFloat(c) || isText(c) 4502 || c == 't' || isCharacter(c)); 4503 } 4504 4505 // Returns true iff the Conversion is applicable to all objects. 4506 static boolean isGeneral(char c) { 4507 switch (c) { 4508 case BOOLEAN: 4509 case BOOLEAN_UPPER: 4510 case STRING: 4511 case STRING_UPPER: 4512 case HASHCODE: 4513 case HASHCODE_UPPER: 4514 return true; 4515 default: 4516 return false; 4517 } 4518 } 4519 4520 // Returns true iff the Conversion is applicable to character. 4521 static boolean isCharacter(char c) { 4522 switch (c) { 4523 case CHARACTER: 4524 case CHARACTER_UPPER: 4525 return true; 4526 default: 4527 return false; 4528 } 4529 } 4530 4531 // Returns true iff the Conversion is an integer type. 4532 static boolean isInteger(char c) { 4533 switch (c) { 4534 case DECIMAL_INTEGER: 4535 case OCTAL_INTEGER: 4536 case HEXADECIMAL_INTEGER: 4537 case HEXADECIMAL_INTEGER_UPPER: 4538 return true; 4539 default: 4540 return false; 4541 } 4542 } 4543 4544 // Returns true iff the Conversion is a floating-point type. 4545 static boolean isFloat(char c) { 4546 switch (c) { 4547 case SCIENTIFIC: 4548 case SCIENTIFIC_UPPER: 4549 case GENERAL: 4550 case GENERAL_UPPER: 4551 case DECIMAL_FLOAT: 4552 case HEXADECIMAL_FLOAT: 4553 case HEXADECIMAL_FLOAT_UPPER: 4554 return true; 4555 default: 4556 return false; 4557 } 4558 } 4559 4560 // Returns true iff the Conversion does not require an argument 4561 static boolean isText(char c) { 4562 switch (c) { 4563 case LINE_SEPARATOR: 4564 case PERCENT_SIGN: 4565 return true; 4566 default: 4567 return false; 4568 } 4569 } 4570 } 4571 4572 private static class DateTime { 4573 static final char HOUR_OF_DAY_0 = 'H'; // (00 - 23) 4574 static final char HOUR_0 = 'I'; // (01 - 12) 4575 static final char HOUR_OF_DAY = 'k'; // (0 - 23) -- like H 4576 static final char HOUR = 'l'; // (1 - 12) -- like I 4577 static final char MINUTE = 'M'; // (00 - 59) 4578 static final char NANOSECOND = 'N'; // (000000000 - 999999999) 4579 static final char MILLISECOND = 'L'; // jdk, not in gnu (000 - 999) 4580 static final char MILLISECOND_SINCE_EPOCH = 'Q'; // (0 - 99...?) 4581 static final char AM_PM = 'p'; // (am or pm) 4582 static final char SECONDS_SINCE_EPOCH = 's'; // (0 - 99...?) 4583 static final char SECOND = 'S'; // (00 - 60 - leap second) 4584 static final char TIME = 'T'; // (24 hour hh:mm:ss) 4585 static final char ZONE_NUMERIC = 'z'; // (-1200 - +1200) - ls minus? 4586 static final char ZONE = 'Z'; // (symbol) 4587 4588 // Date 4589 static final char NAME_OF_DAY_ABBREV = 'a'; // 'a' 4590 static final char NAME_OF_DAY = 'A'; // 'A' 4591 static final char NAME_OF_MONTH_ABBREV = 'b'; // 'b' 4592 static final char NAME_OF_MONTH = 'B'; // 'B' 4593 static final char CENTURY = 'C'; // (00 - 99) 4594 static final char DAY_OF_MONTH_0 = 'd'; // (01 - 31) 4595 static final char DAY_OF_MONTH = 'e'; // (1 - 31) -- like d 4596 // * static final char ISO_WEEK_OF_YEAR_2 = 'g'; // cross %y %V 4597 // * static final char ISO_WEEK_OF_YEAR_4 = 'G'; // cross %Y %V 4598 static final char NAME_OF_MONTH_ABBREV_X = 'h'; // -- same b 4599 static final char DAY_OF_YEAR = 'j'; // (001 - 366) 4600 static final char MONTH = 'm'; // (01 - 12) 4601 // * static final char DAY_OF_WEEK_1 = 'u'; // (1 - 7) Monday 4602 // * static final char WEEK_OF_YEAR_SUNDAY = 'U'; // (0 - 53) Sunday+ 4603 // * static final char WEEK_OF_YEAR_MONDAY_01 = 'V'; // (01 - 53) Monday+ 4604 // * static final char DAY_OF_WEEK_0 = 'w'; // (0 - 6) Sunday 4605 // * static final char WEEK_OF_YEAR_MONDAY = 'W'; // (00 - 53) Monday 4606 static final char YEAR_2 = 'y'; // (00 - 99) 4607 static final char YEAR_4 = 'Y'; // (0000 - 9999) 4608 4609 // Composites 4610 static final char TIME_12_HOUR = 'r'; // (hh:mm:ss [AP]M) 4611 static final char TIME_24_HOUR = 'R'; // (hh:mm same as %H:%M) 4612 // * static final char LOCALE_TIME = 'X'; // (%H:%M:%S) - parse format? 4613 static final char DATE_TIME = 'c'; 4614 // (Sat Nov 04 12:02:33 EST 1999) 4615 static final char DATE = 'D'; // (mm/dd/yy) 4616 static final char ISO_STANDARD_DATE = 'F'; // (%Y-%m-%d) 4617 // * static final char LOCALE_DATE = 'x'; // (mm/dd/yy) 4618 4619 static boolean isValid(char c) { 4620 switch (c) { 4621 case HOUR_OF_DAY_0: 4622 case HOUR_0: 4623 case HOUR_OF_DAY: 4624 case HOUR: 4625 case MINUTE: 4626 case NANOSECOND: 4627 case MILLISECOND: 4628 case MILLISECOND_SINCE_EPOCH: 4629 case AM_PM: 4630 case SECONDS_SINCE_EPOCH: 4631 case SECOND: 4632 case TIME: 4633 case ZONE_NUMERIC: 4634 case ZONE: 4635 4636 // Date 4637 case NAME_OF_DAY_ABBREV: 4638 case NAME_OF_DAY: 4639 case NAME_OF_MONTH_ABBREV: 4640 case NAME_OF_MONTH: 4641 case CENTURY: 4642 case DAY_OF_MONTH_0: 4643 case DAY_OF_MONTH: 4644 // * case ISO_WEEK_OF_YEAR_2: 4645 // * case ISO_WEEK_OF_YEAR_4: 4646 case NAME_OF_MONTH_ABBREV_X: 4647 case DAY_OF_YEAR: 4648 case MONTH: 4649 // * case DAY_OF_WEEK_1: 4650 // * case WEEK_OF_YEAR_SUNDAY: 4651 // * case WEEK_OF_YEAR_MONDAY_01: 4652 // * case DAY_OF_WEEK_0: 4653 // * case WEEK_OF_YEAR_MONDAY: 4654 case YEAR_2: 4655 case YEAR_4: 4656 4657 // Composites 4658 case TIME_12_HOUR: 4659 case TIME_24_HOUR: 4660 // * case LOCALE_TIME: 4661 case DATE_TIME: 4662 case DATE: 4663 case ISO_STANDARD_DATE: 4664 // * case LOCALE_DATE: 4665 return true; 4666 default: 4667 return false; 4668 } 4669 } 4670 } 4671 }