1 /*
   2  * Copyright (c) 1996, 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 /*
  27  * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
  28  * (C) Copyright IBM Corp. 1996-1998 - All Rights Reserved
  29  *
  30  *   The original version of this source code and documentation is copyrighted
  31  * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
  32  * materials are provided under terms of a License Agreement between Taligent
  33  * and Sun. This technology is protected by multiple US and International
  34  * patents. This notice and attribution to Taligent may not be removed.
  35  *   Taligent is a registered trademark of Taligent, Inc.
  36  *
  37  */
  38 
  39 package java.text;
  40 
  41 import java.io.IOException;
  42 import java.io.InvalidObjectException;
  43 import java.io.ObjectInputStream;
  44 import static java.text.DateFormatSymbols.*;
  45 import java.util.Calendar;
  46 import java.util.Date;
  47 import java.util.GregorianCalendar;
  48 import java.util.Locale;
  49 import java.util.Map;
  50 import java.util.SimpleTimeZone;
  51 import java.util.SortedMap;
  52 import java.util.TimeZone;
  53 import java.util.concurrent.ConcurrentHashMap;
  54 import java.util.concurrent.ConcurrentMap;
  55 import sun.util.calendar.CalendarUtils;
  56 import sun.util.calendar.ZoneInfoFile;
  57 import sun.util.locale.provider.LocaleProviderAdapter;
  58 
  59 /**
  60  * <code>SimpleDateFormat</code> is a concrete class for formatting and
  61  * parsing dates in a locale-sensitive manner. It allows for formatting
  62  * (date -> text), parsing (text -> date), and normalization.
  63  *
  64  * <p>
  65  * <code>SimpleDateFormat</code> allows you to start by choosing
  66  * any user-defined patterns for date-time formatting. However, you
  67  * are encouraged to create a date-time formatter with either
  68  * <code>getTimeInstance</code>, <code>getDateInstance</code>, or
  69  * <code>getDateTimeInstance</code> in <code>DateFormat</code>. Each
  70  * of these class methods can return a date/time formatter initialized
  71  * with a default format pattern. You may modify the format pattern
  72  * using the <code>applyPattern</code> methods as desired.
  73  * For more information on using these methods, see
  74  * {@link DateFormat}.
  75  *
  76  * <h4>Date and Time Patterns</h4>
  77  * <p>
  78  * Date and time formats are specified by <em>date and time pattern</em>
  79  * strings.
  80  * Within date and time pattern strings, unquoted letters from
  81  * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
  82  * <code>'z'</code> are interpreted as pattern letters representing the
  83  * components of a date or time string.
  84  * Text can be quoted using single quotes (<code>'</code>) to avoid
  85  * interpretation.
  86  * <code>"''"</code> represents a single quote.
  87  * All other characters are not interpreted; they're simply copied into the
  88  * output string during formatting or matched against the input string
  89  * during parsing.
  90  * <p>
  91  * The following pattern letters are defined (all other characters from
  92  * <code>'A'</code> to <code>'Z'</code> and from <code>'a'</code> to
  93  * <code>'z'</code> are reserved):
  94  * <blockquote>
  95  * <table border=0 cellspacing=3 cellpadding=0 summary="Chart shows pattern letters, date/time component, presentation, and examples.">
  96  *     <tr bgcolor="#ccccff">
  97  *         <th align=left>Letter
  98  *         <th align=left>Date or Time Component
  99  *         <th align=left>Presentation
 100  *         <th align=left>Examples
 101  *     <tr>
 102  *         <td><code>G</code>
 103  *         <td>Era designator
 104  *         <td><a href="#text">Text</a>
 105  *         <td><code>AD</code>
 106  *     <tr bgcolor="#eeeeff">
 107  *         <td><code>y</code>
 108  *         <td>Year
 109  *         <td><a href="#year">Year</a>
 110  *         <td><code>1996</code>; <code>96</code>
 111  *     <tr>
 112  *         <td><code>Y</code>
 113  *         <td>Week year
 114  *         <td><a href="#year">Year</a>
 115  *         <td><code>2009</code>; <code>09</code>
 116  *     <tr bgcolor="#eeeeff">
 117  *         <td><code>M</code>
 118  *         <td>Month in year (context sensitive)
 119  *         <td><a href="#month">Month</a>
 120  *         <td><code>July</code>; <code>Jul</code>; <code>07</code>
 121  *     <tr>
 122  *         <td><code>L</code>
 123  *         <td>Month in year (standalone form)
 124  *         <td><a href="#month">Month</a>
 125  *         <td><code>July</code>; <code>Jul</code>; <code>07</code>
 126  *     <tr bgcolor="#eeeeff">
 127  *         <td><code>w</code>
 128  *         <td>Week in year
 129  *         <td><a href="#number">Number</a>
 130  *         <td><code>27</code>
 131  *     <tr>
 132  *         <td><code>W</code>
 133  *         <td>Week in month
 134  *         <td><a href="#number">Number</a>
 135  *         <td><code>2</code>
 136  *     <tr bgcolor="#eeeeff">
 137  *         <td><code>D</code>
 138  *         <td>Day in year
 139  *         <td><a href="#number">Number</a>
 140  *         <td><code>189</code>
 141  *     <tr>
 142  *         <td><code>d</code>
 143  *         <td>Day in month
 144  *         <td><a href="#number">Number</a>
 145  *         <td><code>10</code>
 146  *     <tr bgcolor="#eeeeff">
 147  *         <td><code>F</code>
 148  *         <td>Day of week in month
 149  *         <td><a href="#number">Number</a>
 150  *         <td><code>2</code>
 151  *     <tr>
 152  *         <td><code>E</code>
 153  *         <td>Day name in week
 154  *         <td><a href="#text">Text</a>
 155  *         <td><code>Tuesday</code>; <code>Tue</code>
 156  *     <tr bgcolor="#eeeeff">
 157  *         <td><code>u</code>
 158  *         <td>Day number of week (1 = Monday, ..., 7 = Sunday)
 159  *         <td><a href="#number">Number</a>
 160  *         <td><code>1</code>
 161  *     <tr>
 162  *         <td><code>a</code>
 163  *         <td>Am/pm marker
 164  *         <td><a href="#text">Text</a>
 165  *         <td><code>PM</code>
 166  *     <tr bgcolor="#eeeeff">
 167  *         <td><code>H</code>
 168  *         <td>Hour in day (0-23)
 169  *         <td><a href="#number">Number</a>
 170  *         <td><code>0</code>
 171  *     <tr>
 172  *         <td><code>k</code>
 173  *         <td>Hour in day (1-24)
 174  *         <td><a href="#number">Number</a>
 175  *         <td><code>24</code>
 176  *     <tr bgcolor="#eeeeff">
 177  *         <td><code>K</code>
 178  *         <td>Hour in am/pm (0-11)
 179  *         <td><a href="#number">Number</a>
 180  *         <td><code>0</code>
 181  *     <tr>
 182  *         <td><code>h</code>
 183  *         <td>Hour in am/pm (1-12)
 184  *         <td><a href="#number">Number</a>
 185  *         <td><code>12</code>
 186  *     <tr bgcolor="#eeeeff">
 187  *         <td><code>m</code>
 188  *         <td>Minute in hour
 189  *         <td><a href="#number">Number</a>
 190  *         <td><code>30</code>
 191  *     <tr>
 192  *         <td><code>s</code>
 193  *         <td>Second in minute
 194  *         <td><a href="#number">Number</a>
 195  *         <td><code>55</code>
 196  *     <tr bgcolor="#eeeeff">
 197  *         <td><code>S</code>
 198  *         <td>Millisecond
 199  *         <td><a href="#number">Number</a>
 200  *         <td><code>978</code>
 201  *     <tr>
 202  *         <td><code>z</code>
 203  *         <td>Time zone
 204  *         <td><a href="#timezone">General time zone</a>
 205  *         <td><code>Pacific Standard Time</code>; <code>PST</code>; <code>GMT-08:00</code>
 206  *     <tr bgcolor="#eeeeff">
 207  *         <td><code>Z</code>
 208  *         <td>Time zone
 209  *         <td><a href="#rfc822timezone">RFC 822 time zone</a>
 210  *         <td><code>-0800</code>
 211  *     <tr>
 212  *         <td><code>X</code>
 213  *         <td>Time zone
 214  *         <td><a href="#iso8601timezone">ISO 8601 time zone</a>
 215  *         <td><code>-08</code>; <code>-0800</code>;  <code>-08:00</code>
 216  * </table>
 217  * </blockquote>
 218  * Pattern letters are usually repeated, as their number determines the
 219  * exact presentation:
 220  * <ul>
 221  * <li><strong><a name="text">Text:</a></strong>
 222  *     For formatting, if the number of pattern letters is 4 or more,
 223  *     the full form is used; otherwise a short or abbreviated form
 224  *     is used if available.
 225  *     For parsing, both forms are accepted, independent of the number
 226  *     of pattern letters.<br><br></li>
 227  * <li><strong><a name="number">Number:</a></strong>
 228  *     For formatting, the number of pattern letters is the minimum
 229  *     number of digits, and shorter numbers are zero-padded to this amount.
 230  *     For parsing, the number of pattern letters is ignored unless
 231  *     it's needed to separate two adjacent fields.<br><br></li>
 232  * <li><strong><a name="year">Year:</a></strong>
 233  *     If the formatter's {@link #getCalendar() Calendar} is the Gregorian
 234  *     calendar, the following rules are applied.<br>
 235  *     <ul>
 236  *     <li>For formatting, if the number of pattern letters is 2, the year
 237  *         is truncated to 2 digits; otherwise it is interpreted as a
 238  *         <a href="#number">number</a>.
 239  *     <li>For parsing, if the number of pattern letters is more than 2,
 240  *         the year is interpreted literally, regardless of the number of
 241  *         digits. So using the pattern "MM/dd/yyyy", "01/11/12" parses to
 242  *         Jan 11, 12 A.D.
 243  *     <li>For parsing with the abbreviated year pattern ("y" or "yy"),
 244  *         <code>SimpleDateFormat</code> must interpret the abbreviated year
 245  *         relative to some century.  It does this by adjusting dates to be
 246  *         within 80 years before and 20 years after the time the <code>SimpleDateFormat</code>
 247  *         instance is created. For example, using a pattern of "MM/dd/yy" and a
 248  *         <code>SimpleDateFormat</code> instance created on Jan 1, 1997,  the string
 249  *         "01/11/12" would be interpreted as Jan 11, 2012 while the string "05/04/64"
 250  *         would be interpreted as May 4, 1964.
 251  *         During parsing, only strings consisting of exactly two digits, as defined by
 252  *         {@link Character#isDigit(char)}, will be parsed into the default century.
 253  *         Any other numeric string, such as a one digit string, a three or more digit
 254  *         string, or a two digit string that isn't all digits (for example, "-1"), is
 255  *         interpreted literally.  So "01/02/3" or "01/02/003" are parsed, using the
 256  *         same pattern, as Jan 2, 3 AD.  Likewise, "01/02/-3" is parsed as Jan 2, 4 BC.
 257  *     </ul>
 258  *     Otherwise, calendar system specific forms are applied.
 259  *     For both formatting and parsing, if the number of pattern
 260  *     letters is 4 or more, a calendar specific {@linkplain
 261  *     Calendar#LONG long form} is used. Otherwise, a calendar
 262  *     specific {@linkplain Calendar#SHORT short or abbreviated form}
 263  *     is used.<br>
 264  *     <br>
 265  *     If week year {@code 'Y'} is specified and the {@linkplain
 266  *     #getCalendar() calendar} doesn't support any <a
 267  *     href="../util/GregorianCalendar.html#week_year"> week
 268  *     years</a>, the calendar year ({@code 'y'}) is used instead. The
 269  *     support of week years can be tested with a call to {@link
 270  *     DateFormat#getCalendar() getCalendar()}.{@link
 271  *     java.util.Calendar#isWeekDateSupported()
 272  *     isWeekDateSupported()}.<br><br></li>
 273  * <li><strong><a name="month">Month:</a></strong>
 274  *     If the number of pattern letters is 3 or more, the month is
 275  *     interpreted as <a href="#text">text</a>; otherwise,
 276  *     it is interpreted as a <a href="#number">number</a>.<br>
 277  *     <ul>
 278  *     <li>Letter <em>M</em> produces context-sensitive month names, such as the
 279  *         embedded form of names. If a {@code DateFormatSymbols} has been set
 280  *         explicitly with constructor {@link #SimpleDateFormat(String,
 281  *         DateFormatSymbols)} or method {@link
 282  *         #setDateFormatSymbols(DateFormatSymbols)}, the month names given by
 283  *         the {@code DateFormatSymbols} are used.</li>
 284  *     <li>Letter <em>L</em> produces the standalone form of month names.</li>
 285  *     </ul>
 286  *     <br></li>
 287  * <li><strong><a name="timezone">General time zone:</a></strong>
 288  *     Time zones are interpreted as <a href="#text">text</a> if they have
 289  *     names. For time zones representing a GMT offset value, the
 290  *     following syntax is used:
 291  *     <pre>
 292  *     <a name="GMTOffsetTimeZone"><i>GMTOffsetTimeZone:</i></a>
 293  *             <code>GMT</code> <i>Sign</i> <i>Hours</i> <code>:</code> <i>Minutes</i>
 294  *     <i>Sign:</i> one of
 295  *             <code>+ -</code>
 296  *     <i>Hours:</i>
 297  *             <i>Digit</i>
 298  *             <i>Digit</i> <i>Digit</i>
 299  *     <i>Minutes:</i>
 300  *             <i>Digit</i> <i>Digit</i>
 301  *     <i>Digit:</i> one of
 302  *             <code>0 1 2 3 4 5 6 7 8 9</code></pre>
 303  *     <i>Hours</i> must be between 0 and 23, and <i>Minutes</i> must be between
 304  *     00 and 59. The format is locale independent and digits must be taken
 305  *     from the Basic Latin block of the Unicode standard.
 306  *     <p>For parsing, <a href="#rfc822timezone">RFC 822 time zones</a> are also
 307  *     accepted.<br><br></li>
 308  * <li><strong><a name="rfc822timezone">RFC 822 time zone:</a></strong>
 309  *     For formatting, the RFC 822 4-digit time zone format is used:
 310  *
 311  *     <pre>
 312  *     <i>RFC822TimeZone:</i>
 313  *             <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
 314  *     <i>TwoDigitHours:</i>
 315  *             <i>Digit Digit</i></pre>
 316  *     <i>TwoDigitHours</i> must be between 00 and 23. Other definitions
 317  *     are as for <a href="#timezone">general time zones</a>.
 318  *
 319  *     <p>For parsing, <a href="#timezone">general time zones</a> are also
 320  *     accepted.
 321  * <li><strong><a name="iso8601timezone">ISO 8601 Time zone:</a></strong>
 322  *     The number of pattern letters designates the format for both formatting
 323  *     and parsing as follows:
 324  *     <pre>
 325  *     <i>ISO8601TimeZone:</i>
 326  *             <i>OneLetterISO8601TimeZone</i>
 327  *             <i>TwoLetterISO8601TimeZone</i>
 328  *             <i>ThreeLetterISO8601TimeZone</i>
 329  *     <i>OneLetterISO8601TimeZone:</i>
 330  *             <i>Sign</i> <i>TwoDigitHours</i>
 331  *             {@code Z}
 332  *     <i>TwoLetterISO8601TimeZone:</i>
 333  *             <i>Sign</i> <i>TwoDigitHours</i> <i>Minutes</i>
 334  *             {@code Z}
 335  *     <i>ThreeLetterISO8601TimeZone:</i>
 336  *             <i>Sign</i> <i>TwoDigitHours</i> {@code :} <i>Minutes</i>
 337  *             {@code Z}</pre>
 338  *     Other definitions are as for <a href="#timezone">general time zones</a> or
 339  *     <a href="#rfc822timezone">RFC 822 time zones</a>.
 340  *
 341  *     <p>For formatting, if the offset value from GMT is 0, {@code "Z"} is
 342  *     produced. If the number of pattern letters is 1, any fraction of an hour
 343  *     is ignored. For example, if the pattern is {@code "X"} and the time zone is
 344  *     {@code "GMT+05:30"}, {@code "+05"} is produced.
 345  *
 346  *     <p>For parsing, {@code "Z"} is parsed as the UTC time zone designator.
 347  *     <a href="#timezone">General time zones</a> are <em>not</em> accepted.
 348  *
 349  *     <p>If the number of pattern letters is 4 or more, {@link
 350  *     IllegalArgumentException} is thrown when constructing a {@code
 351  *     SimpleDateFormat} or {@linkplain #applyPattern(String) applying a
 352  *     pattern}.
 353  * </ul>
 354  * <code>SimpleDateFormat</code> also supports <em>localized date and time
 355  * pattern</em> strings. In these strings, the pattern letters described above
 356  * may be replaced with other, locale dependent, pattern letters.
 357  * <code>SimpleDateFormat</code> does not deal with the localization of text
 358  * other than the pattern letters; that's up to the client of the class.
 359  * <p>
 360  *
 361  * <h4>Examples</h4>
 362  *
 363  * The following examples show how date and time patterns are interpreted in
 364  * the U.S. locale. The given date and time are 2001-07-04 12:08:56 local time
 365  * in the U.S. Pacific Time time zone.
 366  * <blockquote>
 367  * <table border=0 cellspacing=3 cellpadding=0 summary="Examples of date and time patterns interpreted in the U.S. locale">
 368  *     <tr bgcolor="#ccccff">
 369  *         <th align=left>Date and Time Pattern
 370  *         <th align=left>Result
 371  *     <tr>
 372  *         <td><code>"yyyy.MM.dd G 'at' HH:mm:ss z"</code>
 373  *         <td><code>2001.07.04 AD at 12:08:56 PDT</code>
 374  *     <tr bgcolor="#eeeeff">
 375  *         <td><code>"EEE, MMM d, ''yy"</code>
 376  *         <td><code>Wed, Jul 4, '01</code>
 377  *     <tr>
 378  *         <td><code>"h:mm a"</code>
 379  *         <td><code>12:08 PM</code>
 380  *     <tr bgcolor="#eeeeff">
 381  *         <td><code>"hh 'o''clock' a, zzzz"</code>
 382  *         <td><code>12 o'clock PM, Pacific Daylight Time</code>
 383  *     <tr>
 384  *         <td><code>"K:mm a, z"</code>
 385  *         <td><code>0:08 PM, PDT</code>
 386  *     <tr bgcolor="#eeeeff">
 387  *         <td><code>"yyyyy.MMMMM.dd GGG hh:mm aaa"</code>
 388  *         <td><code>02001.July.04 AD 12:08 PM</code>
 389  *     <tr>
 390  *         <td><code>"EEE, d MMM yyyy HH:mm:ss Z"</code>
 391  *         <td><code>Wed, 4 Jul 2001 12:08:56 -0700</code>
 392  *     <tr bgcolor="#eeeeff">
 393  *         <td><code>"yyMMddHHmmssZ"</code>
 394  *         <td><code>010704120856-0700</code>
 395  *     <tr>
 396  *         <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSZ"</code>
 397  *         <td><code>2001-07-04T12:08:56.235-0700</code>
 398  *     <tr bgcolor="#eeeeff">
 399  *         <td><code>"yyyy-MM-dd'T'HH:mm:ss.SSSXXX"</code>
 400  *         <td><code>2001-07-04T12:08:56.235-07:00</code>
 401  *     <tr>
 402  *         <td><code>"YYYY-'W'ww-u"</code>
 403  *         <td><code>2001-W27-3</code>
 404  * </table>
 405  * </blockquote>
 406  *
 407  * <h4><a name="synchronization">Synchronization</a></h4>
 408  *
 409  * <p>
 410  * Date formats are not synchronized.
 411  * It is recommended to create separate format instances for each thread.
 412  * If multiple threads access a format concurrently, it must be synchronized
 413  * externally.
 414  *
 415  * @see          <a href="http://java.sun.com/docs/books/tutorial/i18n/format/simpleDateFormat.html">Java Tutorial</a>
 416  * @see          java.util.Calendar
 417  * @see          java.util.TimeZone
 418  * @see          DateFormat
 419  * @see          DateFormatSymbols
 420  * @author       Mark Davis, Chen-Lieh Huang, Alan Liu
 421  */
 422 public class SimpleDateFormat extends DateFormat {
 423 
 424     // the official serial version ID which says cryptically
 425     // which version we're compatible with
 426     static final long serialVersionUID = 4774881970558875024L;
 427 
 428     // the internal serial version which says which version was written
 429     // - 0 (default) for version up to JDK 1.1.3
 430     // - 1 for version from JDK 1.1.4, which includes a new field
 431     static final int currentSerialVersion = 1;
 432 
 433     /**
 434      * The version of the serialized data on the stream.  Possible values:
 435      * <ul>
 436      * <li><b>0</b> or not present on stream: JDK 1.1.3.  This version
 437      * has no <code>defaultCenturyStart</code> on stream.
 438      * <li><b>1</b> JDK 1.1.4 or later.  This version adds
 439      * <code>defaultCenturyStart</code>.
 440      * </ul>
 441      * When streaming out this class, the most recent format
 442      * and the highest allowable <code>serialVersionOnStream</code>
 443      * is written.
 444      * @serial
 445      * @since JDK1.1.4
 446      */
 447     private int serialVersionOnStream = currentSerialVersion;
 448 
 449     /**
 450      * The pattern string of this formatter.  This is always a non-localized
 451      * pattern.  May not be null.  See class documentation for details.
 452      * @serial
 453      */
 454     private String pattern;
 455 
 456     /**
 457      * Saved numberFormat and pattern.
 458      * @see SimpleDateFormat#checkNegativeNumberExpression
 459      */
 460     transient private NumberFormat originalNumberFormat;
 461     transient private String originalNumberPattern;
 462 
 463     /**
 464      * The minus sign to be used with format and parse.
 465      */
 466     transient private char minusSign = '-';
 467 
 468     /**
 469      * True when a negative sign follows a number.
 470      * (True as default in Arabic.)
 471      */
 472     transient private boolean hasFollowingMinusSign = false;
 473 
 474     /**
 475      * True if standalone form needs to be used.
 476      */
 477     transient private boolean forceStandaloneForm = false;
 478 
 479     /**
 480      * The compiled pattern.
 481      */
 482     transient private char[] compiledPattern;
 483 
 484     /**
 485      * Tags for the compiled pattern.
 486      */
 487     private final static int TAG_QUOTE_ASCII_CHAR       = 100;
 488     private final static int TAG_QUOTE_CHARS            = 101;
 489 
 490     /**
 491      * Locale dependent digit zero.
 492      * @see #zeroPaddingNumber
 493      * @see java.text.DecimalFormatSymbols#getZeroDigit
 494      */
 495     transient private char zeroDigit;
 496 
 497     /**
 498      * The symbols used by this formatter for week names, month names,
 499      * etc.  May not be null.
 500      * @serial
 501      * @see java.text.DateFormatSymbols
 502      */
 503     private DateFormatSymbols formatData;
 504 
 505     /**
 506      * We map dates with two-digit years into the century starting at
 507      * <code>defaultCenturyStart</code>, which may be any date.  May
 508      * not be null.
 509      * @serial
 510      * @since JDK1.1.4
 511      */
 512     private Date defaultCenturyStart;
 513 
 514     transient private int defaultCenturyStartYear;
 515 
 516     private static final int MILLIS_PER_MINUTE = 60 * 1000;
 517 
 518     // For time zones that have no names, use strings GMT+minutes and
 519     // GMT-minutes. For instance, in France the time zone is GMT+60.
 520     private static final String GMT = "GMT";
 521 
 522     /**
 523      * Cache NumberFormat instances with Locale key.
 524      */
 525     private static final ConcurrentMap<Locale, NumberFormat> cachedNumberFormatData
 526         = new ConcurrentHashMap<>(3);
 527 
 528     /**
 529      * The Locale used to instantiate this
 530      * <code>SimpleDateFormat</code>. The value may be null if this object
 531      * has been created by an older <code>SimpleDateFormat</code> and
 532      * deserialized.
 533      *
 534      * @serial
 535      * @since 1.6
 536      */
 537     private Locale locale;
 538 
 539     /**
 540      * Indicates whether this <code>SimpleDateFormat</code> should use
 541      * the DateFormatSymbols. If true, the format and parse methods
 542      * use the DateFormatSymbols values. If false, the format and
 543      * parse methods call Calendar.getDisplayName or
 544      * Calendar.getDisplayNames.
 545      */
 546     transient boolean useDateFormatSymbols;
 547 
 548     /**
 549      * Constructs a <code>SimpleDateFormat</code> using the default pattern and
 550      * date format symbols for the default
 551      * {@link java.util.Locale.Category#FORMAT FORMAT} locale.
 552      * <b>Note:</b> This constructor may not support all locales.
 553      * For full coverage, use the factory methods in the {@link DateFormat}
 554      * class.
 555      */
 556     public SimpleDateFormat() {
 557         this("", Locale.getDefault(Locale.Category.FORMAT));
 558         applyPatternImpl(LocaleProviderAdapter.getResourceBundleBased().getLocaleResources(locale)
 559                          .getDateTimePattern(SHORT, SHORT, calendar));
 560     }
 561 
 562     /**
 563      * Constructs a <code>SimpleDateFormat</code> using the given pattern and
 564      * the default date format symbols for the default
 565      * {@link java.util.Locale.Category#FORMAT FORMAT} locale.
 566      * <b>Note:</b> This constructor may not support all locales.
 567      * For full coverage, use the factory methods in the {@link DateFormat}
 568      * class.
 569      * <p>This is equivalent to calling
 570      * {@link #SimpleDateFormat(String, Locale)
 571      *     SimpleDateFormat(pattern, Locale.getDefault(Locale.Category.FORMAT))}.
 572      *
 573      * @see java.util.Locale#getDefault(java.util.Locale.Category)
 574      * @see java.util.Locale.Category#FORMAT
 575      * @param pattern the pattern describing the date and time format
 576      * @exception NullPointerException if the given pattern is null
 577      * @exception IllegalArgumentException if the given pattern is invalid
 578      */
 579     public SimpleDateFormat(String pattern)
 580     {
 581         this(pattern, Locale.getDefault(Locale.Category.FORMAT));
 582     }
 583 
 584     /**
 585      * Constructs a <code>SimpleDateFormat</code> using the given pattern and
 586      * the default date format symbols for the given locale.
 587      * <b>Note:</b> This constructor may not support all locales.
 588      * For full coverage, use the factory methods in the {@link DateFormat}
 589      * class.
 590      *
 591      * @param pattern the pattern describing the date and time format
 592      * @param locale the locale whose date format symbols should be used
 593      * @exception NullPointerException if the given pattern or locale is null
 594      * @exception IllegalArgumentException if the given pattern is invalid
 595      */
 596     public SimpleDateFormat(String pattern, Locale locale)
 597     {
 598         if (pattern == null || locale == null) {
 599             throw new NullPointerException();
 600         }
 601 
 602         initializeCalendar(locale);
 603         this.pattern = pattern;
 604         this.formatData = DateFormatSymbols.getInstanceRef(locale);
 605         this.locale = locale;
 606         initialize(locale);
 607     }
 608 
 609     /**
 610      * Constructs a <code>SimpleDateFormat</code> using the given pattern and
 611      * date format symbols.
 612      *
 613      * @param pattern the pattern describing the date and time format
 614      * @param formatSymbols the date format symbols to be used for formatting
 615      * @exception NullPointerException if the given pattern or formatSymbols is null
 616      * @exception IllegalArgumentException if the given pattern is invalid
 617      */
 618     public SimpleDateFormat(String pattern, DateFormatSymbols formatSymbols)
 619     {
 620         if (pattern == null || formatSymbols == null) {
 621             throw new NullPointerException();
 622         }
 623 
 624         this.pattern = pattern;
 625         this.formatData = (DateFormatSymbols) formatSymbols.clone();
 626         this.locale = Locale.getDefault(Locale.Category.FORMAT);
 627         initializeCalendar(this.locale);
 628         initialize(this.locale);
 629         useDateFormatSymbols = true;
 630     }
 631 
 632     /* Initialize compiledPattern and numberFormat fields */
 633     private void initialize(Locale loc) {
 634         // Verify and compile the given pattern.
 635         compiledPattern = compile(pattern);
 636 
 637         /* try the cache first */
 638         numberFormat = cachedNumberFormatData.get(loc);
 639         if (numberFormat == null) { /* cache miss */
 640             numberFormat = NumberFormat.getIntegerInstance(loc);
 641             numberFormat.setGroupingUsed(false);
 642 
 643             /* update cache */
 644             cachedNumberFormatData.putIfAbsent(loc, numberFormat);
 645         }
 646         numberFormat = (NumberFormat) numberFormat.clone();
 647 
 648         initializeDefaultCentury();
 649     }
 650 
 651     private void initializeCalendar(Locale loc) {
 652         if (calendar == null) {
 653             assert loc != null;
 654             // The format object must be constructed using the symbols for this zone.
 655             // However, the calendar should use the current default TimeZone.
 656             // If this is not contained in the locale zone strings, then the zone
 657             // will be formatted using generic GMT+/-H:MM nomenclature.
 658             calendar = Calendar.getInstance(TimeZone.getDefault(), loc);
 659         }
 660     }
 661 
 662     /**
 663      * Returns the compiled form of the given pattern. The syntax of
 664      * the compiled pattern is:
 665      * <blockquote>
 666      * CompiledPattern:
 667      *     EntryList
 668      * EntryList:
 669      *     Entry
 670      *     EntryList Entry
 671      * Entry:
 672      *     TagField
 673      *     TagField data
 674      * TagField:
 675      *     Tag Length
 676      *     TaggedData
 677      * Tag:
 678      *     pattern_char_index
 679      *     TAG_QUOTE_CHARS
 680      * Length:
 681      *     short_length
 682      *     long_length
 683      * TaggedData:
 684      *     TAG_QUOTE_ASCII_CHAR ascii_char
 685      *
 686      * </blockquote>
 687      *
 688      * where `short_length' is an 8-bit unsigned integer between 0 and
 689      * 254.  `long_length' is a sequence of an 8-bit integer 255 and a
 690      * 32-bit signed integer value which is split into upper and lower
 691      * 16-bit fields in two char's. `pattern_char_index' is an 8-bit
 692      * integer between 0 and 18. `ascii_char' is an 7-bit ASCII
 693      * character value. `data' depends on its Tag value.
 694      * <p>
 695      * If Length is short_length, Tag and short_length are packed in a
 696      * single char, as illustrated below.
 697      * <blockquote>
 698      *     char[0] = (Tag << 8) | short_length;
 699      * </blockquote>
 700      *
 701      * If Length is long_length, Tag and 255 are packed in the first
 702      * char and a 32-bit integer, as illustrated below.
 703      * <blockquote>
 704      *     char[0] = (Tag << 8) | 255;
 705      *     char[1] = (char) (long_length >>> 16);
 706      *     char[2] = (char) (long_length & 0xffff);
 707      * </blockquote>
 708      * <p>
 709      * If Tag is a pattern_char_index, its Length is the number of
 710      * pattern characters. For example, if the given pattern is
 711      * "yyyy", Tag is 1 and Length is 4, followed by no data.
 712      * <p>
 713      * If Tag is TAG_QUOTE_CHARS, its Length is the number of char's
 714      * following the TagField. For example, if the given pattern is
 715      * "'o''clock'", Length is 7 followed by a char sequence of
 716      * <code>o&nbs;'&nbs;c&nbs;l&nbs;o&nbs;c&nbs;k</code>.
 717      * <p>
 718      * TAG_QUOTE_ASCII_CHAR is a special tag and has an ASCII
 719      * character in place of Length. For example, if the given pattern
 720      * is "'o'", the TaggedData entry is
 721      * <code>((TAG_QUOTE_ASCII_CHAR&nbs;<<&nbs;8)&nbs;|&nbs;'o')</code>.
 722      *
 723      * @exception NullPointerException if the given pattern is null
 724      * @exception IllegalArgumentException if the given pattern is invalid
 725      */
 726     private char[] compile(String pattern) {
 727         int length = pattern.length();
 728         boolean inQuote = false;
 729         StringBuilder compiledCode = new StringBuilder(length * 2);
 730         StringBuilder tmpBuffer = null;
 731         int count = 0, tagcount = 0;
 732         int lastTag = -1, prevTag = -1;
 733 
 734         for (int i = 0; i < length; i++) {
 735             char c = pattern.charAt(i);
 736 
 737             if (c == '\'') {
 738                 // '' is treated as a single quote regardless of being
 739                 // in a quoted section.
 740                 if ((i + 1) < length) {
 741                     c = pattern.charAt(i + 1);
 742                     if (c == '\'') {
 743                         i++;
 744                         if (count != 0) {
 745                             encode(lastTag, count, compiledCode);
 746                             tagcount++;
 747                             prevTag = lastTag;
 748                             lastTag = -1;
 749                             count = 0;
 750                         }
 751                         if (inQuote) {
 752                             tmpBuffer.append(c);
 753                         } else {
 754                             compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
 755                         }
 756                         continue;
 757                     }
 758                 }
 759                 if (!inQuote) {
 760                     if (count != 0) {
 761                         encode(lastTag, count, compiledCode);
 762                         tagcount++;
 763                         prevTag = lastTag;
 764                         lastTag = -1;
 765                         count = 0;
 766                     }
 767                     if (tmpBuffer == null) {
 768                         tmpBuffer = new StringBuilder(length);
 769                     } else {
 770                         tmpBuffer.setLength(0);
 771                     }
 772                     inQuote = true;
 773                 } else {
 774                     int len = tmpBuffer.length();
 775                     if (len == 1) {
 776                         char ch = tmpBuffer.charAt(0);
 777                         if (ch < 128) {
 778                             compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | ch));
 779                         } else {
 780                             compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | 1));
 781                             compiledCode.append(ch);
 782                         }
 783                     } else {
 784                         encode(TAG_QUOTE_CHARS, len, compiledCode);
 785                         compiledCode.append(tmpBuffer);
 786                     }
 787                     inQuote = false;
 788                 }
 789                 continue;
 790             }
 791             if (inQuote) {
 792                 tmpBuffer.append(c);
 793                 continue;
 794             }
 795             if (!(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z')) {
 796                 if (count != 0) {
 797                     encode(lastTag, count, compiledCode);
 798                     tagcount++;
 799                     prevTag = lastTag;
 800                     lastTag = -1;
 801                     count = 0;
 802                 }
 803                 if (c < 128) {
 804                     // In most cases, c would be a delimiter, such as ':'.
 805                     compiledCode.append((char)(TAG_QUOTE_ASCII_CHAR << 8 | c));
 806                 } else {
 807                     // Take any contiguous non-ASCII alphabet characters and
 808                     // put them in a single TAG_QUOTE_CHARS.
 809                     int j;
 810                     for (j = i + 1; j < length; j++) {
 811                         char d = pattern.charAt(j);
 812                         if (d == '\'' || (d >= 'a' && d <= 'z' || d >= 'A' && d <= 'Z')) {
 813                             break;
 814                         }
 815                     }
 816                     compiledCode.append((char)(TAG_QUOTE_CHARS << 8 | (j - i)));
 817                     for (; i < j; i++) {
 818                         compiledCode.append(pattern.charAt(i));
 819                     }
 820                     i--;
 821                 }
 822                 continue;
 823             }
 824 
 825             int tag;
 826             if ((tag = DateFormatSymbols.patternChars.indexOf(c)) == -1) {
 827                 throw new IllegalArgumentException("Illegal pattern character " +
 828                                                    "'" + c + "'");
 829             }
 830             if (lastTag == -1 || lastTag == tag) {
 831                 lastTag = tag;
 832                 count++;
 833                 continue;
 834             }
 835             encode(lastTag, count, compiledCode);
 836             tagcount++;
 837             prevTag = lastTag;
 838             lastTag = tag;
 839             count = 1;
 840         }
 841 
 842         if (inQuote) {
 843             throw new IllegalArgumentException("Unterminated quote");
 844         }
 845 
 846         if (count != 0) {
 847             encode(lastTag, count, compiledCode);
 848             tagcount++;
 849             prevTag = lastTag;
 850         }
 851 
 852         forceStandaloneForm = (tagcount == 1 && prevTag == PATTERN_MONTH);
 853 
 854         // Copy the compiled pattern to a char array
 855         int len = compiledCode.length();
 856         char[] r = new char[len];
 857         compiledCode.getChars(0, len, r, 0);
 858         return r;
 859     }
 860 
 861     /**
 862      * Encodes the given tag and length and puts encoded char(s) into buffer.
 863      */
 864     private static void encode(int tag, int length, StringBuilder buffer) {
 865         if (tag == PATTERN_ISO_ZONE && length >= 4) {
 866             throw new IllegalArgumentException("invalid ISO 8601 format: length=" + length);
 867         }
 868         if (length < 255) {
 869             buffer.append((char)(tag << 8 | length));
 870         } else {
 871             buffer.append((char)((tag << 8) | 0xff));
 872             buffer.append((char)(length >>> 16));
 873             buffer.append((char)(length & 0xffff));
 874         }
 875     }
 876 
 877     /* Initialize the fields we use to disambiguate ambiguous years. Separate
 878      * so we can call it from readObject().
 879      */
 880     private void initializeDefaultCentury() {
 881         calendar.setTimeInMillis(System.currentTimeMillis());
 882         calendar.add( Calendar.YEAR, -80 );
 883         parseAmbiguousDatesAsAfter(calendar.getTime());
 884     }
 885 
 886     /* Define one-century window into which to disambiguate dates using
 887      * two-digit years.
 888      */
 889     private void parseAmbiguousDatesAsAfter(Date startDate) {
 890         defaultCenturyStart = startDate;
 891         calendar.setTime(startDate);
 892         defaultCenturyStartYear = calendar.get(Calendar.YEAR);
 893     }
 894 
 895     /**
 896      * Sets the 100-year period 2-digit years will be interpreted as being in
 897      * to begin on the date the user specifies.
 898      *
 899      * @param startDate During parsing, two digit years will be placed in the range
 900      * <code>startDate</code> to <code>startDate + 100 years</code>.
 901      * @see #get2DigitYearStart
 902      * @since 1.2
 903      */
 904     public void set2DigitYearStart(Date startDate) {
 905         parseAmbiguousDatesAsAfter(new Date(startDate.getTime()));
 906     }
 907 
 908     /**
 909      * Returns the beginning date of the 100-year period 2-digit years are interpreted
 910      * as being within.
 911      *
 912      * @return the start of the 100-year period into which two digit years are
 913      * parsed
 914      * @see #set2DigitYearStart
 915      * @since 1.2
 916      */
 917     public Date get2DigitYearStart() {
 918         return (Date) defaultCenturyStart.clone();
 919     }
 920 
 921     /**
 922      * Formats the given <code>Date</code> into a date/time string and appends
 923      * the result to the given <code>StringBuffer</code>.
 924      *
 925      * @param date the date-time value to be formatted into a date-time string.
 926      * @param toAppendTo where the new date-time text is to be appended.
 927      * @param pos the formatting position. On input: an alignment field,
 928      * if desired. On output: the offsets of the alignment field.
 929      * @return the formatted date-time string.
 930      * @exception NullPointerException if the given {@code date} is {@code null}.
 931      */
 932     @Override
 933     public StringBuffer format(Date date, StringBuffer toAppendTo,
 934                                FieldPosition pos)
 935     {
 936         pos.beginIndex = pos.endIndex = 0;
 937         return format(date, toAppendTo, pos.getFieldDelegate());
 938     }
 939 
 940     // Called from Format after creating a FieldDelegate
 941     private StringBuffer format(Date date, StringBuffer toAppendTo,
 942                                 FieldDelegate delegate) {
 943         // Convert input date to time field list
 944         calendar.setTime(date);
 945 
 946         boolean useDateFormatSymbols = useDateFormatSymbols();
 947 
 948         for (int i = 0; i < compiledPattern.length; ) {
 949             int tag = compiledPattern[i] >>> 8;
 950             int count = compiledPattern[i++] & 0xff;
 951             if (count == 255) {
 952                 count = compiledPattern[i++] << 16;
 953                 count |= compiledPattern[i++];
 954             }
 955 
 956             switch (tag) {
 957             case TAG_QUOTE_ASCII_CHAR:
 958                 toAppendTo.append((char)count);
 959                 break;
 960 
 961             case TAG_QUOTE_CHARS:
 962                 toAppendTo.append(compiledPattern, i, count);
 963                 i += count;
 964                 break;
 965 
 966             default:
 967                 subFormat(tag, count, delegate, toAppendTo, useDateFormatSymbols);
 968                 break;
 969             }
 970         }
 971         return toAppendTo;
 972     }
 973 
 974     /**
 975      * Formats an Object producing an <code>AttributedCharacterIterator</code>.
 976      * You can use the returned <code>AttributedCharacterIterator</code>
 977      * to build the resulting String, as well as to determine information
 978      * about the resulting String.
 979      * <p>
 980      * Each attribute key of the AttributedCharacterIterator will be of type
 981      * <code>DateFormat.Field</code>, with the corresponding attribute value
 982      * being the same as the attribute key.
 983      *
 984      * @exception NullPointerException if obj is null.
 985      * @exception IllegalArgumentException if the Format cannot format the
 986      *            given object, or if the Format's pattern string is invalid.
 987      * @param obj The object to format
 988      * @return AttributedCharacterIterator describing the formatted value.
 989      * @since 1.4
 990      */
 991     @Override
 992     public AttributedCharacterIterator formatToCharacterIterator(Object obj) {
 993         StringBuffer sb = new StringBuffer();
 994         CharacterIteratorFieldDelegate delegate = new
 995                          CharacterIteratorFieldDelegate();
 996 
 997         if (obj instanceof Date) {
 998             format((Date)obj, sb, delegate);
 999         }
1000         else if (obj instanceof Number) {
1001             format(new Date(((Number)obj).longValue()), sb, delegate);
1002         }
1003         else if (obj == null) {
1004             throw new NullPointerException(
1005                    "formatToCharacterIterator must be passed non-null object");
1006         }
1007         else {
1008             throw new IllegalArgumentException(
1009                              "Cannot format given Object as a Date");
1010         }
1011         return delegate.getIterator(sb.toString());
1012     }
1013 
1014     // Map index into pattern character string to Calendar field number
1015     private static final int[] PATTERN_INDEX_TO_CALENDAR_FIELD = {
1016         Calendar.ERA,
1017         Calendar.YEAR,
1018         Calendar.MONTH,
1019         Calendar.DATE,
1020         Calendar.HOUR_OF_DAY,
1021         Calendar.HOUR_OF_DAY,
1022         Calendar.MINUTE,
1023         Calendar.SECOND,
1024         Calendar.MILLISECOND,
1025         Calendar.DAY_OF_WEEK,
1026         Calendar.DAY_OF_YEAR,
1027         Calendar.DAY_OF_WEEK_IN_MONTH,
1028         Calendar.WEEK_OF_YEAR,
1029         Calendar.WEEK_OF_MONTH,
1030         Calendar.AM_PM,
1031         Calendar.HOUR,
1032         Calendar.HOUR,
1033         Calendar.ZONE_OFFSET,
1034         Calendar.ZONE_OFFSET,
1035         CalendarBuilder.WEEK_YEAR,         // Pseudo Calendar field
1036         CalendarBuilder.ISO_DAY_OF_WEEK,   // Pseudo Calendar field
1037         Calendar.ZONE_OFFSET,
1038         Calendar.MONTH
1039     };
1040 
1041     // Map index into pattern character string to DateFormat field number
1042     private static final int[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD = {
1043         DateFormat.ERA_FIELD,
1044         DateFormat.YEAR_FIELD,
1045         DateFormat.MONTH_FIELD,
1046         DateFormat.DATE_FIELD,
1047         DateFormat.HOUR_OF_DAY1_FIELD,
1048         DateFormat.HOUR_OF_DAY0_FIELD,
1049         DateFormat.MINUTE_FIELD,
1050         DateFormat.SECOND_FIELD,
1051         DateFormat.MILLISECOND_FIELD,
1052         DateFormat.DAY_OF_WEEK_FIELD,
1053         DateFormat.DAY_OF_YEAR_FIELD,
1054         DateFormat.DAY_OF_WEEK_IN_MONTH_FIELD,
1055         DateFormat.WEEK_OF_YEAR_FIELD,
1056         DateFormat.WEEK_OF_MONTH_FIELD,
1057         DateFormat.AM_PM_FIELD,
1058         DateFormat.HOUR1_FIELD,
1059         DateFormat.HOUR0_FIELD,
1060         DateFormat.TIMEZONE_FIELD,
1061         DateFormat.TIMEZONE_FIELD,
1062         DateFormat.YEAR_FIELD,
1063         DateFormat.DAY_OF_WEEK_FIELD,
1064         DateFormat.TIMEZONE_FIELD,
1065         DateFormat.MONTH_FIELD
1066     };
1067 
1068     // Maps from DecimalFormatSymbols index to Field constant
1069     private static final Field[] PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID = {
1070         Field.ERA,
1071         Field.YEAR,
1072         Field.MONTH,
1073         Field.DAY_OF_MONTH,
1074         Field.HOUR_OF_DAY1,
1075         Field.HOUR_OF_DAY0,
1076         Field.MINUTE,
1077         Field.SECOND,
1078         Field.MILLISECOND,
1079         Field.DAY_OF_WEEK,
1080         Field.DAY_OF_YEAR,
1081         Field.DAY_OF_WEEK_IN_MONTH,
1082         Field.WEEK_OF_YEAR,
1083         Field.WEEK_OF_MONTH,
1084         Field.AM_PM,
1085         Field.HOUR1,
1086         Field.HOUR0,
1087         Field.TIME_ZONE,
1088         Field.TIME_ZONE,
1089         Field.YEAR,
1090         Field.DAY_OF_WEEK,
1091         Field.TIME_ZONE,
1092         Field.MONTH
1093     };
1094 
1095     /**
1096      * Private member function that does the real date/time formatting.
1097      */
1098     private void subFormat(int patternCharIndex, int count,
1099                            FieldDelegate delegate, StringBuffer buffer,
1100                            boolean useDateFormatSymbols)
1101     {
1102         int     maxIntCount = Integer.MAX_VALUE;
1103         String  current = null;
1104         int     beginOffset = buffer.length();
1105 
1106         int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1107         int value;
1108         if (field == CalendarBuilder.WEEK_YEAR) {
1109             if (calendar.isWeekDateSupported()) {
1110                 value = calendar.getWeekYear();
1111             } else {
1112                 // use calendar year 'y' instead
1113                 patternCharIndex = PATTERN_YEAR;
1114                 field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1115                 value = calendar.get(field);
1116             }
1117         } else if (field == CalendarBuilder.ISO_DAY_OF_WEEK) {
1118             value = CalendarBuilder.toISODayOfWeek(calendar.get(Calendar.DAY_OF_WEEK));
1119         } else {
1120             value = calendar.get(field);
1121         }
1122 
1123         int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1124         if (!useDateFormatSymbols && field < Calendar.ZONE_OFFSET
1125             && patternCharIndex != PATTERN_MONTH_STANDALONE) {
1126             current = calendar.getDisplayName(field, style, locale);
1127         }
1128 
1129         // Note: zeroPaddingNumber() assumes that maxDigits is either
1130         // 2 or maxIntCount. If we make any changes to this,
1131         // zeroPaddingNumber() must be fixed.
1132 
1133         switch (patternCharIndex) {
1134         case PATTERN_ERA: // 'G'
1135             if (useDateFormatSymbols) {
1136                 String[] eras = formatData.getEras();
1137                 if (value < eras.length) {
1138                     current = eras[value];
1139                 }
1140             }
1141             if (current == null) {
1142                 current = "";
1143             }
1144             break;
1145 
1146         case PATTERN_WEEK_YEAR: // 'Y'
1147         case PATTERN_YEAR:      // 'y'
1148             if (calendar instanceof GregorianCalendar) {
1149                 if (count != 2) {
1150                     zeroPaddingNumber(value, count, maxIntCount, buffer);
1151                 } else {
1152                     zeroPaddingNumber(value, 2, 2, buffer);
1153                 } // clip 1996 to 96
1154             } else {
1155                 if (current == null) {
1156                     zeroPaddingNumber(value, style == Calendar.LONG ? 1 : count,
1157                                       maxIntCount, buffer);
1158                 }
1159             }
1160             break;
1161 
1162         case PATTERN_MONTH:            // 'M' (context seinsive)
1163             if (useDateFormatSymbols) {
1164                 String[] months;
1165                 if (count >= 4) {
1166                     months = formatData.getMonths();
1167                     current = months[value];
1168                 } else if (count == 3) {
1169                     months = formatData.getShortMonths();
1170                     current = months[value];
1171                 }
1172             } else {
1173                 if (count < 3) {
1174                     current = null;
1175                 } else if (forceStandaloneForm) {
1176                     current = calendar.getDisplayName(field, style | 0x8000, locale);
1177                     if (current == null) {
1178                         current = calendar.getDisplayName(field, style, locale);
1179                     }
1180                 }
1181             }
1182             if (current == null) {
1183                 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1184             }
1185             break;
1186 
1187         case PATTERN_MONTH_STANDALONE: // 'L'
1188             assert current == null;
1189             if (locale == null) {
1190                 String[] months;
1191                 if (count >= 4) {
1192                     months = formatData.getMonths();
1193                     current = months[value];
1194                 } else if (count == 3) {
1195                     months = formatData.getShortMonths();
1196                     current = months[value];
1197                 }
1198             } else {
1199                 if (count >= 3) {
1200                     current = calendar.getDisplayName(field, style | 0x8000, locale);
1201                 }
1202             }
1203             if (current == null) {
1204                 zeroPaddingNumber(value+1, count, maxIntCount, buffer);
1205             }
1206             break;
1207 
1208         case PATTERN_HOUR_OF_DAY1: // 'k' 1-based.  eg, 23:59 + 1 hour =>> 24:59
1209             if (current == null) {
1210                 if (value == 0) {
1211                     zeroPaddingNumber(calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1,
1212                                       count, maxIntCount, buffer);
1213                 } else {
1214                     zeroPaddingNumber(value, count, maxIntCount, buffer);
1215                 }
1216             }
1217             break;
1218 
1219         case PATTERN_DAY_OF_WEEK: // 'E'
1220             if (useDateFormatSymbols) {
1221                 String[] weekdays;
1222                 if (count >= 4) {
1223                     weekdays = formatData.getWeekdays();
1224                     current = weekdays[value];
1225                 } else { // count < 4, use abbreviated form if exists
1226                     weekdays = formatData.getShortWeekdays();
1227                     current = weekdays[value];
1228                 }
1229             }
1230             break;
1231 
1232         case PATTERN_AM_PM:    // 'a'
1233             if (useDateFormatSymbols) {
1234                 String[] ampm = formatData.getAmPmStrings();
1235                 current = ampm[value];
1236             }
1237             break;
1238 
1239         case PATTERN_HOUR1:    // 'h' 1-based.  eg, 11PM + 1 hour =>> 12 AM
1240             if (current == null) {
1241                 if (value == 0) {
1242                     zeroPaddingNumber(calendar.getLeastMaximum(Calendar.HOUR) + 1,
1243                                       count, maxIntCount, buffer);
1244                 } else {
1245                     zeroPaddingNumber(value, count, maxIntCount, buffer);
1246                 }
1247             }
1248             break;
1249 
1250         case PATTERN_ZONE_NAME: // 'z'
1251             if (current == null) {
1252                 if (formatData.locale == null || formatData.isZoneStringsSet) {
1253                     int zoneIndex =
1254                         formatData.getZoneIndex(calendar.getTimeZone().getID());
1255                     if (zoneIndex == -1) {
1256                         value = calendar.get(Calendar.ZONE_OFFSET) +
1257                             calendar.get(Calendar.DST_OFFSET);
1258                         buffer.append(ZoneInfoFile.toCustomID(value));
1259                     } else {
1260                         int index = (calendar.get(Calendar.DST_OFFSET) == 0) ? 1: 3;
1261                         if (count < 4) {
1262                             // Use the short name
1263                             index++;
1264                         }
1265                         String[][] zoneStrings = formatData.getZoneStringsWrapper();
1266                         buffer.append(zoneStrings[zoneIndex][index]);
1267                     }
1268                 } else {
1269                     TimeZone tz = calendar.getTimeZone();
1270                     boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0);
1271                     int tzstyle = (count < 4 ? TimeZone.SHORT : TimeZone.LONG);
1272                     buffer.append(tz.getDisplayName(daylight, tzstyle, formatData.locale));
1273                 }
1274             }
1275             break;
1276 
1277         case PATTERN_ZONE_VALUE: // 'Z' ("-/+hhmm" form)
1278             value = (calendar.get(Calendar.ZONE_OFFSET) +
1279                      calendar.get(Calendar.DST_OFFSET)) / 60000;
1280 
1281             int width = 4;
1282             if (value >= 0) {
1283                 buffer.append('+');
1284             } else {
1285                 width++;
1286             }
1287 
1288             int num = (value / 60) * 100 + (value % 60);
1289             CalendarUtils.sprintf0d(buffer, num, width);
1290             break;
1291 
1292         case PATTERN_ISO_ZONE:   // 'X'
1293             value = calendar.get(Calendar.ZONE_OFFSET)
1294                     + calendar.get(Calendar.DST_OFFSET);
1295 
1296             if (value == 0) {
1297                 buffer.append('Z');
1298                 break;
1299             }
1300 
1301             value /=  60000;
1302             if (value >= 0) {
1303                 buffer.append('+');
1304             } else {
1305                 buffer.append('-');
1306                 value = -value;
1307             }
1308 
1309             CalendarUtils.sprintf0d(buffer, value / 60, 2);
1310             if (count == 1) {
1311                 break;
1312             }
1313 
1314             if (count == 3) {
1315                 buffer.append(':');
1316             }
1317             CalendarUtils.sprintf0d(buffer, value % 60, 2);
1318             break;
1319 
1320         default:
1321      // case PATTERN_DAY_OF_MONTH:         // 'd'
1322      // case PATTERN_HOUR_OF_DAY0:         // 'H' 0-based.  eg, 23:59 + 1 hour =>> 00:59
1323      // case PATTERN_MINUTE:               // 'm'
1324      // case PATTERN_SECOND:               // 's'
1325      // case PATTERN_MILLISECOND:          // 'S'
1326      // case PATTERN_DAY_OF_YEAR:          // 'D'
1327      // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
1328      // case PATTERN_WEEK_OF_YEAR:         // 'w'
1329      // case PATTERN_WEEK_OF_MONTH:        // 'W'
1330      // case PATTERN_HOUR0:                // 'K' eg, 11PM + 1 hour =>> 0 AM
1331      // case PATTERN_ISO_DAY_OF_WEEK:      // 'u' pseudo field, Monday = 1, ..., Sunday = 7
1332             if (current == null) {
1333                 zeroPaddingNumber(value, count, maxIntCount, buffer);
1334             }
1335             break;
1336         } // switch (patternCharIndex)
1337 
1338         if (current != null) {
1339             buffer.append(current);
1340         }
1341 
1342         int fieldID = PATTERN_INDEX_TO_DATE_FORMAT_FIELD[patternCharIndex];
1343         Field f = PATTERN_INDEX_TO_DATE_FORMAT_FIELD_ID[patternCharIndex];
1344 
1345         delegate.formatted(fieldID, f, f, beginOffset, buffer.length(), buffer);
1346     }
1347 
1348     /**
1349      * Formats a number with the specified minimum and maximum number of digits.
1350      */
1351     private void zeroPaddingNumber(int value, int minDigits, int maxDigits, StringBuffer buffer)
1352     {
1353         // Optimization for 1, 2 and 4 digit numbers. This should
1354         // cover most cases of formatting date/time related items.
1355         // Note: This optimization code assumes that maxDigits is
1356         // either 2 or Integer.MAX_VALUE (maxIntCount in format()).
1357         try {
1358             if (zeroDigit == 0) {
1359                 zeroDigit = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getZeroDigit();
1360             }
1361             if (value >= 0) {
1362                 if (value < 100 && minDigits >= 1 && minDigits <= 2) {
1363                     if (value < 10) {
1364                         if (minDigits == 2) {
1365                             buffer.append(zeroDigit);
1366                         }
1367                         buffer.append((char)(zeroDigit + value));
1368                     } else {
1369                         buffer.append((char)(zeroDigit + value / 10));
1370                         buffer.append((char)(zeroDigit + value % 10));
1371                     }
1372                     return;
1373                 } else if (value >= 1000 && value < 10000) {
1374                     if (minDigits == 4) {
1375                         buffer.append((char)(zeroDigit + value / 1000));
1376                         value %= 1000;
1377                         buffer.append((char)(zeroDigit + value / 100));
1378                         value %= 100;
1379                         buffer.append((char)(zeroDigit + value / 10));
1380                         buffer.append((char)(zeroDigit + value % 10));
1381                         return;
1382                     }
1383                     if (minDigits == 2 && maxDigits == 2) {
1384                         zeroPaddingNumber(value % 100, 2, 2, buffer);
1385                         return;
1386                     }
1387                 }
1388             }
1389         } catch (Exception e) {
1390         }
1391 
1392         numberFormat.setMinimumIntegerDigits(minDigits);
1393         numberFormat.setMaximumIntegerDigits(maxDigits);
1394         numberFormat.format((long)value, buffer, DontCareFieldPosition.INSTANCE);
1395     }
1396 
1397 
1398     /**
1399      * Parses text from a string to produce a <code>Date</code>.
1400      * <p>
1401      * The method attempts to parse text starting at the index given by
1402      * <code>pos</code>.
1403      * If parsing succeeds, then the index of <code>pos</code> is updated
1404      * to the index after the last character used (parsing does not necessarily
1405      * use all characters up to the end of the string), and the parsed
1406      * date is returned. The updated <code>pos</code> can be used to
1407      * indicate the starting point for the next call to this method.
1408      * If an error occurs, then the index of <code>pos</code> is not
1409      * changed, the error index of <code>pos</code> is set to the index of
1410      * the character where the error occurred, and null is returned.
1411      *
1412      * <p>This parsing operation uses the {@link DateFormat#calendar
1413      * calendar} to produce a {@code Date}. All of the {@code
1414      * calendar}'s date-time fields are {@linkplain Calendar#clear()
1415      * cleared} before parsing, and the {@code calendar}'s default
1416      * values of the date-time fields are used for any missing
1417      * date-time information. For example, the year value of the
1418      * parsed {@code Date} is 1970 with {@link GregorianCalendar} if
1419      * no year value is given from the parsing operation.  The {@code
1420      * TimeZone} value may be overwritten, depending on the given
1421      * pattern and the time zone value in {@code text}. Any {@code
1422      * TimeZone} value that has previously been set by a call to
1423      * {@link #setTimeZone(java.util.TimeZone) setTimeZone} may need
1424      * to be restored for further operations.
1425      *
1426      * @param text  A <code>String</code>, part of which should be parsed.
1427      * @param pos   A <code>ParsePosition</code> object with index and error
1428      *              index information as described above.
1429      * @return A <code>Date</code> parsed from the string. In case of
1430      *         error, returns null.
1431      * @exception NullPointerException if <code>text</code> or <code>pos</code> is null.
1432      */
1433     @Override
1434     public Date parse(String text, ParsePosition pos)
1435     {
1436         checkNegativeNumberExpression();
1437 
1438         int start = pos.index;
1439         int oldStart = start;
1440         int textLength = text.length();
1441 
1442         boolean[] ambiguousYear = {false};
1443 
1444         CalendarBuilder calb = new CalendarBuilder();
1445 
1446         for (int i = 0; i < compiledPattern.length; ) {
1447             int tag = compiledPattern[i] >>> 8;
1448             int count = compiledPattern[i++] & 0xff;
1449             if (count == 255) {
1450                 count = compiledPattern[i++] << 16;
1451                 count |= compiledPattern[i++];
1452             }
1453 
1454             switch (tag) {
1455             case TAG_QUOTE_ASCII_CHAR:
1456                 if (start >= textLength || text.charAt(start) != (char)count) {
1457                     pos.index = oldStart;
1458                     pos.errorIndex = start;
1459                     return null;
1460                 }
1461                 start++;
1462                 break;
1463 
1464             case TAG_QUOTE_CHARS:
1465                 while (count-- > 0) {
1466                     if (start >= textLength || text.charAt(start) != compiledPattern[i++]) {
1467                         pos.index = oldStart;
1468                         pos.errorIndex = start;
1469                         return null;
1470                     }
1471                     start++;
1472                 }
1473                 break;
1474 
1475             default:
1476                 // Peek the next pattern to determine if we need to
1477                 // obey the number of pattern letters for
1478                 // parsing. It's required when parsing contiguous
1479                 // digit text (e.g., "20010704") with a pattern which
1480                 // has no delimiters between fields, like "yyyyMMdd".
1481                 boolean obeyCount = false;
1482 
1483                 // In Arabic, a minus sign for a negative number is put after
1484                 // the number. Even in another locale, a minus sign can be
1485                 // put after a number using DateFormat.setNumberFormat().
1486                 // If both the minus sign and the field-delimiter are '-',
1487                 // subParse() needs to determine whether a '-' after a number
1488                 // in the given text is a delimiter or is a minus sign for the
1489                 // preceding number. We give subParse() a clue based on the
1490                 // information in compiledPattern.
1491                 boolean useFollowingMinusSignAsDelimiter = false;
1492 
1493                 if (i < compiledPattern.length) {
1494                     int nextTag = compiledPattern[i] >>> 8;
1495                     if (!(nextTag == TAG_QUOTE_ASCII_CHAR ||
1496                           nextTag == TAG_QUOTE_CHARS)) {
1497                         obeyCount = true;
1498                     }
1499 
1500                     if (hasFollowingMinusSign &&
1501                         (nextTag == TAG_QUOTE_ASCII_CHAR ||
1502                          nextTag == TAG_QUOTE_CHARS)) {
1503                         int c;
1504                         if (nextTag == TAG_QUOTE_ASCII_CHAR) {
1505                             c = compiledPattern[i] & 0xff;
1506                         } else {
1507                             c = compiledPattern[i+1];
1508                         }
1509 
1510                         if (c == minusSign) {
1511                             useFollowingMinusSignAsDelimiter = true;
1512                         }
1513                     }
1514                 }
1515                 start = subParse(text, start, tag, count, obeyCount,
1516                                  ambiguousYear, pos,
1517                                  useFollowingMinusSignAsDelimiter, calb);
1518                 if (start < 0) {
1519                     pos.index = oldStart;
1520                     return null;
1521                 }
1522             }
1523         }
1524 
1525         // At this point the fields of Calendar have been set.  Calendar
1526         // will fill in default values for missing fields when the time
1527         // is computed.
1528 
1529         pos.index = start;
1530 
1531         Date parsedDate;
1532         try {
1533             parsedDate = calb.establish(calendar).getTime();
1534             // If the year value is ambiguous,
1535             // then the two-digit year == the default start year
1536             if (ambiguousYear[0]) {
1537                 if (parsedDate.before(defaultCenturyStart)) {
1538                     parsedDate = calb.addYear(100).establish(calendar).getTime();
1539                 }
1540             }
1541         }
1542         // An IllegalArgumentException will be thrown by Calendar.getTime()
1543         // if any fields are out of range, e.g., MONTH == 17.
1544         catch (IllegalArgumentException e) {
1545             pos.errorIndex = start;
1546             pos.index = oldStart;
1547             return null;
1548         }
1549 
1550         return parsedDate;
1551     }
1552 
1553     /**
1554      * Private code-size reduction function used by subParse.
1555      * @param text the time text being parsed.
1556      * @param start where to start parsing.
1557      * @param field the date field being parsed.
1558      * @param data the string array to parsed.
1559      * @return the new start position if matching succeeded; a negative number
1560      * indicating matching failure, otherwise.
1561      */
1562     private int matchString(String text, int start, int field, String[] data, CalendarBuilder calb)
1563     {
1564         int i = 0;
1565         int count = data.length;
1566 
1567         if (field == Calendar.DAY_OF_WEEK) {
1568             i = 1;
1569         }
1570 
1571         // There may be multiple strings in the data[] array which begin with
1572         // the same prefix (e.g., Cerven and Cervenec (June and July) in Czech).
1573         // We keep track of the longest match, and return that.  Note that this
1574         // unfortunately requires us to test all array elements.
1575         int bestMatchLength = 0, bestMatch = -1;
1576         for (; i<count; ++i)
1577         {
1578             int length = data[i].length();
1579             // Always compare if we have no match yet; otherwise only compare
1580             // against potentially better matches (longer strings).
1581             if (length > bestMatchLength &&
1582                 text.regionMatches(true, start, data[i], 0, length))
1583             {
1584                 bestMatch = i;
1585                 bestMatchLength = length;
1586             }
1587         }
1588         if (bestMatch >= 0)
1589         {
1590             calb.set(field, bestMatch);
1591             return start + bestMatchLength;
1592         }
1593         return -start;
1594     }
1595 
1596     /**
1597      * Performs the same thing as matchString(String, int, int,
1598      * String[]). This method takes a Map<String, Integer> instead of
1599      * String[].
1600      */
1601     private int matchString(String text, int start, int field,
1602                             Map<String,Integer> data, CalendarBuilder calb) {
1603         if (data != null) {
1604             // TODO: make this default when it's in the spec.
1605             if (data instanceof SortedMap) {
1606                 for (String name : data.keySet()) {
1607                     if (text.regionMatches(true, start, name, 0, name.length())) {
1608                         calb.set(field, data.get(name));
1609                         return start + name.length();
1610                     }
1611                 }
1612                 return -start;
1613             }
1614 
1615             String bestMatch = null;
1616 
1617             for (String name : data.keySet()) {
1618                 int length = name.length();
1619                 if (bestMatch == null || length > bestMatch.length()) {
1620                     if (text.regionMatches(true, start, name, 0, length)) {
1621                         bestMatch = name;
1622                     }
1623                 }
1624             }
1625 
1626             if (bestMatch != null) {
1627                 calb.set(field, data.get(bestMatch));
1628                 return start + bestMatch.length();
1629             }
1630         }
1631         return -start;
1632     }
1633 
1634     private int matchZoneString(String text, int start, String[] zoneNames) {
1635         for (int i = 1; i <= 4; ++i) {
1636             // Checking long and short zones [1 & 2],
1637             // and long and short daylight [3 & 4].
1638             String zoneName = zoneNames[i];
1639             if (text.regionMatches(true, start,
1640                                    zoneName, 0, zoneName.length())) {
1641                 return i;
1642             }
1643         }
1644         return -1;
1645     }
1646 
1647     private boolean matchDSTString(String text, int start, int zoneIndex, int standardIndex,
1648                                    String[][] zoneStrings) {
1649         int index = standardIndex + 2;
1650         String zoneName  = zoneStrings[zoneIndex][index];
1651         if (text.regionMatches(true, start,
1652                                zoneName, 0, zoneName.length())) {
1653             return true;
1654         }
1655         return false;
1656     }
1657 
1658     /**
1659      * find time zone 'text' matched zoneStrings and set to internal
1660      * calendar.
1661      */
1662     private int subParseZoneString(String text, int start, CalendarBuilder calb) {
1663         boolean useSameName = false; // true if standard and daylight time use the same abbreviation.
1664         TimeZone currentTimeZone = getTimeZone();
1665 
1666         // At this point, check for named time zones by looking through
1667         // the locale data from the TimeZoneNames strings.
1668         // Want to be able to parse both short and long forms.
1669         int zoneIndex = formatData.getZoneIndex(currentTimeZone.getID());
1670         TimeZone tz = null;
1671         String[][] zoneStrings = formatData.getZoneStringsWrapper();
1672         String[] zoneNames = null;
1673         int nameIndex = 0;
1674         if (zoneIndex != -1) {
1675             zoneNames = zoneStrings[zoneIndex];
1676             if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1677                 if (nameIndex <= 2) {
1678                     // Check if the standard name (abbr) and the daylight name are the same.
1679                     useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1680                 }
1681                 tz = TimeZone.getTimeZone(zoneNames[0]);
1682             }
1683         }
1684         if (tz == null) {
1685             zoneIndex = formatData.getZoneIndex(TimeZone.getDefault().getID());
1686             if (zoneIndex != -1) {
1687                 zoneNames = zoneStrings[zoneIndex];
1688                 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1689                     if (nameIndex <= 2) {
1690                         useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1691                     }
1692                     tz = TimeZone.getTimeZone(zoneNames[0]);
1693                 }
1694             }
1695         }
1696 
1697         if (tz == null) {
1698             int len = zoneStrings.length;
1699             for (int i = 0; i < len; i++) {
1700                 zoneNames = zoneStrings[i];
1701                 if ((nameIndex = matchZoneString(text, start, zoneNames)) > 0) {
1702                     if (nameIndex <= 2) {
1703                         useSameName = zoneNames[nameIndex].equalsIgnoreCase(zoneNames[nameIndex + 2]);
1704                     }
1705                     tz = TimeZone.getTimeZone(zoneNames[0]);
1706                     break;
1707                 }
1708             }
1709         }
1710         if (tz != null) { // Matched any ?
1711             if (!tz.equals(currentTimeZone)) {
1712                 setTimeZone(tz);
1713             }
1714             // If the time zone matched uses the same name
1715             // (abbreviation) for both standard and daylight time,
1716             // let the time zone in the Calendar decide which one.
1717             //
1718             // Also if tz.getDSTSaving() returns 0 for DST, use tz to
1719             // determine the local time. (6645292)
1720             int dstAmount = (nameIndex >= 3) ? tz.getDSTSavings() : 0;
1721             if (!(useSameName || (nameIndex >= 3 && dstAmount == 0))) {
1722                 calb.clear(Calendar.ZONE_OFFSET).set(Calendar.DST_OFFSET, dstAmount);
1723             }
1724             return (start + zoneNames[nameIndex].length());
1725         }
1726         return 0;
1727     }
1728 
1729     /**
1730      * Parses numeric forms of time zone offset, such as "hh:mm", and
1731      * sets calb to the parsed value.
1732      *
1733      * @param text  the text to be parsed
1734      * @param start the character position to start parsing
1735      * @param sign  1: positive; -1: negative
1736      * @param count 0: 'Z' or "GMT+hh:mm" parsing; 1 - 3: the number of 'X's
1737      * @param colon true - colon required between hh and mm; false - no colon required
1738      * @param calb  a CalendarBuilder in which the parsed value is stored
1739      * @return updated parsed position, or its negative value to indicate a parsing error
1740      */
1741     private int subParseNumericZone(String text, int start, int sign, int count,
1742                                     boolean colon, CalendarBuilder calb) {
1743         int index = start;
1744 
1745       parse:
1746         try {
1747             char c = text.charAt(index++);
1748             // Parse hh
1749             int hours;
1750             if (!isDigit(c)) {
1751                 break parse;
1752             }
1753             hours = c - '0';
1754             c = text.charAt(index++);
1755             if (isDigit(c)) {
1756                 hours = hours * 10 + (c - '0');
1757             } else {
1758                 // If no colon in RFC 822 or 'X' (ISO), two digits are
1759                 // required.
1760                 if (count > 0 || !colon) {
1761                     break parse;
1762                 }
1763                 --index;
1764             }
1765             if (hours > 23) {
1766                 break parse;
1767             }
1768             int minutes = 0;
1769             if (count != 1) {
1770                 // Proceed with parsing mm
1771                 c = text.charAt(index++);
1772                 if (colon) {
1773                     if (c != ':') {
1774                         break parse;
1775                     }
1776                     c = text.charAt(index++);
1777                 }
1778                 if (!isDigit(c)) {
1779                     break parse;
1780                 }
1781                 minutes = c - '0';
1782                 c = text.charAt(index++);
1783                 if (!isDigit(c)) {
1784                     break parse;
1785                 }
1786                 minutes = minutes * 10 + (c - '0');
1787                 if (minutes > 59) {
1788                     break parse;
1789                 }
1790             }
1791             minutes += hours * 60;
1792             calb.set(Calendar.ZONE_OFFSET, minutes * MILLIS_PER_MINUTE * sign)
1793                 .set(Calendar.DST_OFFSET, 0);
1794             return index;
1795         } catch (IndexOutOfBoundsException e) {
1796         }
1797         return  1 - index; // -(index - 1)
1798     }
1799 
1800     private boolean isDigit(char c) {
1801         return c >= '0' && c <= '9';
1802     }
1803 
1804     /**
1805      * Private member function that converts the parsed date strings into
1806      * timeFields. Returns -start (for ParsePosition) if failed.
1807      * @param text the time text to be parsed.
1808      * @param start where to start parsing.
1809      * @param patternCharIndex the index of the pattern character.
1810      * @param count the count of a pattern character.
1811      * @param obeyCount if true, then the next field directly abuts this one,
1812      * and we should use the count to know when to stop parsing.
1813      * @param ambiguousYear return parameter; upon return, if ambiguousYear[0]
1814      * is true, then a two-digit year was parsed and may need to be readjusted.
1815      * @param origPos origPos.errorIndex is used to return an error index
1816      * at which a parse error occurred, if matching failure occurs.
1817      * @return the new start position if matching succeeded; -1 indicating
1818      * matching failure, otherwise. In case matching failure occurred,
1819      * an error index is set to origPos.errorIndex.
1820      */
1821     private int subParse(String text, int start, int patternCharIndex, int count,
1822                          boolean obeyCount, boolean[] ambiguousYear,
1823                          ParsePosition origPos,
1824                          boolean useFollowingMinusSignAsDelimiter, CalendarBuilder calb) {
1825         Number number;
1826         int value = 0;
1827         ParsePosition pos = new ParsePosition(0);
1828         pos.index = start;
1829         if (patternCharIndex == PATTERN_WEEK_YEAR && !calendar.isWeekDateSupported()) {
1830             // use calendar year 'y' instead
1831             patternCharIndex = PATTERN_YEAR;
1832         }
1833         int field = PATTERN_INDEX_TO_CALENDAR_FIELD[patternCharIndex];
1834 
1835         // If there are any spaces here, skip over them.  If we hit the end
1836         // of the string, then fail.
1837         for (;;) {
1838             if (pos.index >= text.length()) {
1839                 origPos.errorIndex = start;
1840                 return -1;
1841             }
1842             char c = text.charAt(pos.index);
1843             if (c != ' ' && c != '\t') {
1844                 break;
1845             }
1846             ++pos.index;
1847         }
1848 
1849       parsing:
1850         {
1851             // We handle a few special cases here where we need to parse
1852             // a number value.  We handle further, more generic cases below.  We need
1853             // to handle some of them here because some fields require extra processing on
1854             // the parsed value.
1855             if (patternCharIndex == PATTERN_HOUR_OF_DAY1 ||
1856                 patternCharIndex == PATTERN_HOUR1 ||
1857                 (patternCharIndex == PATTERN_MONTH && count <= 2) ||
1858                 patternCharIndex == PATTERN_YEAR ||
1859                 patternCharIndex == PATTERN_WEEK_YEAR) {
1860                 // It would be good to unify this with the obeyCount logic below,
1861                 // but that's going to be difficult.
1862                 if (obeyCount) {
1863                     if ((start+count) > text.length()) {
1864                         break parsing;
1865                     }
1866                     number = numberFormat.parse(text.substring(0, start+count), pos);
1867                 } else {
1868                     number = numberFormat.parse(text, pos);
1869                 }
1870                 if (number == null) {
1871                     if (patternCharIndex != PATTERN_YEAR || calendar instanceof GregorianCalendar) {
1872                         break parsing;
1873                     }
1874                 } else {
1875                     value = number.intValue();
1876 
1877                     if (useFollowingMinusSignAsDelimiter && (value < 0) &&
1878                         (((pos.index < text.length()) &&
1879                          (text.charAt(pos.index) != minusSign)) ||
1880                          ((pos.index == text.length()) &&
1881                           (text.charAt(pos.index-1) == minusSign)))) {
1882                         value = -value;
1883                         pos.index--;
1884                     }
1885                 }
1886             }
1887 
1888             boolean useDateFormatSymbols = useDateFormatSymbols();
1889 
1890             int index;
1891             switch (patternCharIndex) {
1892             case PATTERN_ERA: // 'G'
1893                 if (useDateFormatSymbols) {
1894                     if ((index = matchString(text, start, Calendar.ERA, formatData.getEras(), calb)) > 0) {
1895                         return index;
1896                     }
1897                 } else {
1898                     Map<String, Integer> map = getDisplayNamesMap(field, locale);
1899                     if ((index = matchString(text, start, field, map, calb)) > 0) {
1900                         return index;
1901                     }
1902                 }
1903                 break parsing;
1904 
1905             case PATTERN_WEEK_YEAR: // 'Y'
1906             case PATTERN_YEAR:      // 'y'
1907                 if (!(calendar instanceof GregorianCalendar)) {
1908                     // calendar might have text representations for year values,
1909                     // such as "\u5143" in JapaneseImperialCalendar.
1910                     int style = (count >= 4) ? Calendar.LONG : Calendar.SHORT;
1911                     Map<String, Integer> map = calendar.getDisplayNames(field, style, locale);
1912                     if (map != null) {
1913                         if ((index = matchString(text, start, field, map, calb)) > 0) {
1914                             return index;
1915                         }
1916                     }
1917                     calb.set(field, value);
1918                     return pos.index;
1919                 }
1920 
1921                 // If there are 3 or more YEAR pattern characters, this indicates
1922                 // that the year value is to be treated literally, without any
1923                 // two-digit year adjustments (e.g., from "01" to 2001).  Otherwise
1924                 // we made adjustments to place the 2-digit year in the proper
1925                 // century, for parsed strings from "00" to "99".  Any other string
1926                 // is treated literally:  "2250", "-1", "1", "002".
1927                 if (count <= 2 && (pos.index - start) == 2
1928                     && Character.isDigit(text.charAt(start))
1929                     && Character.isDigit(text.charAt(start+1))) {
1930                     // Assume for example that the defaultCenturyStart is 6/18/1903.
1931                     // This means that two-digit years will be forced into the range
1932                     // 6/18/1903 to 6/17/2003.  As a result, years 00, 01, and 02
1933                     // correspond to 2000, 2001, and 2002.  Years 04, 05, etc. correspond
1934                     // to 1904, 1905, etc.  If the year is 03, then it is 2003 if the
1935                     // other fields specify a date before 6/18, or 1903 if they specify a
1936                     // date afterwards.  As a result, 03 is an ambiguous year.  All other
1937                     // two-digit years are unambiguous.
1938                     int ambiguousTwoDigitYear = defaultCenturyStartYear % 100;
1939                     ambiguousYear[0] = value == ambiguousTwoDigitYear;
1940                     value += (defaultCenturyStartYear/100)*100 +
1941                         (value < ambiguousTwoDigitYear ? 100 : 0);
1942                 }
1943                 calb.set(field, value);
1944                 return pos.index;
1945 
1946             case PATTERN_MONTH: // 'M'
1947                 if (count <= 2) // i.e., M or MM.
1948                 {
1949                     // Don't want to parse the month if it is a string
1950                     // while pattern uses numeric style: M or MM.
1951                     // [We computed 'value' above.]
1952                     calb.set(Calendar.MONTH, value - 1);
1953                     return pos.index;
1954                 }
1955 
1956                 if (useDateFormatSymbols) {
1957                     // count >= 3 // i.e., MMM or MMMM
1958                     // Want to be able to parse both short and long forms.
1959                     // Try count == 4 first:
1960                     int newStart;
1961                     if ((newStart = matchString(text, start, Calendar.MONTH,
1962                                                 formatData.getMonths(), calb)) > 0) {
1963                         return newStart;
1964                     }
1965                     // count == 4 failed, now try count == 3
1966                     if ((index = matchString(text, start, Calendar.MONTH,
1967                                              formatData.getShortMonths(), calb)) > 0) {
1968                         return index;
1969                     }
1970                 } else {
1971                     Map<String, Integer> map = getDisplayNamesMap(field, locale);
1972                     if ((index = matchString(text, start, field, map, calb)) > 0) {
1973                         return index;
1974                     }
1975                 }
1976                 break parsing;
1977 
1978             case PATTERN_HOUR_OF_DAY1: // 'k' 1-based.  eg, 23:59 + 1 hour =>> 24:59
1979                 if (!isLenient()) {
1980                     // Validate the hour value in non-lenient
1981                     if (value < 1 || value > 24) {
1982                         break parsing;
1983                     }
1984                 }
1985                 // [We computed 'value' above.]
1986                 if (value == calendar.getMaximum(Calendar.HOUR_OF_DAY) + 1) {
1987                     value = 0;
1988                 }
1989                 calb.set(Calendar.HOUR_OF_DAY, value);
1990                 return pos.index;
1991 
1992             case PATTERN_DAY_OF_WEEK:  // 'E'
1993                 {
1994                     if (useDateFormatSymbols) {
1995                         // Want to be able to parse both short and long forms.
1996                         // Try count == 4 (DDDD) first:
1997                         int newStart;
1998                         if ((newStart=matchString(text, start, Calendar.DAY_OF_WEEK,
1999                                                   formatData.getWeekdays(), calb)) > 0) {
2000                             return newStart;
2001                         }
2002                         // DDDD failed, now try DDD
2003                         if ((index = matchString(text, start, Calendar.DAY_OF_WEEK,
2004                                                  formatData.getShortWeekdays(), calb)) > 0) {
2005                             return index;
2006                         }
2007                     } else {
2008                         int[] styles = { Calendar.LONG, Calendar.SHORT };
2009                         for (int style : styles) {
2010                             Map<String,Integer> map = calendar.getDisplayNames(field, style, locale);
2011                             if ((index = matchString(text, start, field, map, calb)) > 0) {
2012                                 return index;
2013                             }
2014                         }
2015                     }
2016                 }
2017                 break parsing;
2018 
2019             case PATTERN_AM_PM:    // 'a'
2020                 if (useDateFormatSymbols) {
2021                     if ((index = matchString(text, start, Calendar.AM_PM,
2022                                              formatData.getAmPmStrings(), calb)) > 0) {
2023                         return index;
2024                     }
2025                 } else {
2026                     Map<String,Integer> map = getDisplayNamesMap(field, locale);
2027                     if ((index = matchString(text, start, field, map, calb)) > 0) {
2028                         return index;
2029                     }
2030                 }
2031                 break parsing;
2032 
2033             case PATTERN_HOUR1: // 'h' 1-based.  eg, 11PM + 1 hour =>> 12 AM
2034                 if (!isLenient()) {
2035                     // Validate the hour value in non-lenient
2036                     if (value < 1 || value > 12) {
2037                         break parsing;
2038                     }
2039                 }
2040                 // [We computed 'value' above.]
2041                 if (value == calendar.getLeastMaximum(Calendar.HOUR) + 1) {
2042                     value = 0;
2043                 }
2044                 calb.set(Calendar.HOUR, value);
2045                 return pos.index;
2046 
2047             case PATTERN_ZONE_NAME:  // 'z'
2048             case PATTERN_ZONE_VALUE: // 'Z'
2049                 {
2050                     int sign = 0;
2051                     try {
2052                         char c = text.charAt(pos.index);
2053                         if (c == '+') {
2054                             sign = 1;
2055                         } else if (c == '-') {
2056                             sign = -1;
2057                         }
2058                         if (sign == 0) {
2059                             // Try parsing a custom time zone "GMT+hh:mm" or "GMT".
2060                             if ((c == 'G' || c == 'g')
2061                                 && (text.length() - start) >= GMT.length()
2062                                 && text.regionMatches(true, start, GMT, 0, GMT.length())) {
2063                                 pos.index = start + GMT.length();
2064 
2065                                 if ((text.length() - pos.index) > 0) {
2066                                     c = text.charAt(pos.index);
2067                                     if (c == '+') {
2068                                         sign = 1;
2069                                     } else if (c == '-') {
2070                                         sign = -1;
2071                                     }
2072                                 }
2073 
2074                                 if (sign == 0) {    /* "GMT" without offset */
2075                                     calb.set(Calendar.ZONE_OFFSET, 0)
2076                                         .set(Calendar.DST_OFFSET, 0);
2077                                     return pos.index;
2078                                 }
2079 
2080                                 // Parse the rest as "hh:mm"
2081                                 int i = subParseNumericZone(text, ++pos.index,
2082                                                             sign, 0, true, calb);
2083                                 if (i > 0) {
2084                                     return i;
2085                                 }
2086                                 pos.index = -i;
2087                             } else {
2088                                 // Try parsing the text as a time zone
2089                                 // name or abbreviation.
2090                                 int i = subParseZoneString(text, pos.index, calb);
2091                                 if (i > 0) {
2092                                     return i;
2093                                 }
2094                                 pos.index = -i;
2095                             }
2096                         } else {
2097                             // Parse the rest as "hhmm" (RFC 822)
2098                             int i = subParseNumericZone(text, ++pos.index,
2099                                                         sign, 0, false, calb);
2100                             if (i > 0) {
2101                                 return i;
2102                             }
2103                             pos.index = -i;
2104                         }
2105                     } catch (IndexOutOfBoundsException e) {
2106                     }
2107                 }
2108                 break parsing;
2109 
2110             case PATTERN_ISO_ZONE:   // 'X'
2111                 {
2112                     if ((text.length() - pos.index) <= 0) {
2113                         break parsing;
2114                     }
2115 
2116                     int sign;
2117                     char c = text.charAt(pos.index);
2118                     if (c == 'Z') {
2119                         calb.set(Calendar.ZONE_OFFSET, 0).set(Calendar.DST_OFFSET, 0);
2120                         return ++pos.index;
2121                     }
2122 
2123                     // parse text as "+/-hh[[:]mm]" based on count
2124                     if (c == '+') {
2125                         sign = 1;
2126                     } else if (c == '-') {
2127                         sign = -1;
2128                     } else {
2129                         ++pos.index;
2130                         break parsing;
2131                     }
2132                     int i = subParseNumericZone(text, ++pos.index, sign, count,
2133                                                 count == 3, calb);
2134                     if (i > 0) {
2135                         return i;
2136                     }
2137                     pos.index = -i;
2138                 }
2139                 break parsing;
2140 
2141             default:
2142          // case PATTERN_DAY_OF_MONTH:         // 'd'
2143          // case PATTERN_HOUR_OF_DAY0:         // 'H' 0-based.  eg, 23:59 + 1 hour =>> 00:59
2144          // case PATTERN_MINUTE:               // 'm'
2145          // case PATTERN_SECOND:               // 's'
2146          // case PATTERN_MILLISECOND:          // 'S'
2147          // case PATTERN_DAY_OF_YEAR:          // 'D'
2148          // case PATTERN_DAY_OF_WEEK_IN_MONTH: // 'F'
2149          // case PATTERN_WEEK_OF_YEAR:         // 'w'
2150          // case PATTERN_WEEK_OF_MONTH:        // 'W'
2151          // case PATTERN_HOUR0:                // 'K' 0-based.  eg, 11PM + 1 hour =>> 0 AM
2152          // case PATTERN_ISO_DAY_OF_WEEK:      // 'u' (pseudo field);
2153 
2154                 // Handle "generic" fields
2155                 if (obeyCount) {
2156                     if ((start+count) > text.length()) {
2157                         break parsing;
2158                     }
2159                     number = numberFormat.parse(text.substring(0, start+count), pos);
2160                 } else {
2161                     number = numberFormat.parse(text, pos);
2162                 }
2163                 if (number != null) {
2164                     value = number.intValue();
2165 
2166                     if (useFollowingMinusSignAsDelimiter && (value < 0) &&
2167                         (((pos.index < text.length()) &&
2168                          (text.charAt(pos.index) != minusSign)) ||
2169                          ((pos.index == text.length()) &&
2170                           (text.charAt(pos.index-1) == minusSign)))) {
2171                         value = -value;
2172                         pos.index--;
2173                     }
2174 
2175                     calb.set(field, value);
2176                     return pos.index;
2177                 }
2178                 break parsing;
2179             }
2180         }
2181 
2182         // Parsing failed.
2183         origPos.errorIndex = pos.index;
2184         return -1;
2185     }
2186 
2187     /**
2188      * Returns true if the DateFormatSymbols has been set explicitly or locale
2189      * is null.
2190      */
2191     private boolean useDateFormatSymbols() {
2192         return useDateFormatSymbols || locale == null;
2193     }
2194 
2195     /**
2196      * Translates a pattern, mapping each character in the from string to the
2197      * corresponding character in the to string.
2198      *
2199      * @exception IllegalArgumentException if the given pattern is invalid
2200      */
2201     private String translatePattern(String pattern, String from, String to) {
2202         StringBuilder result = new StringBuilder();
2203         boolean inQuote = false;
2204         for (int i = 0; i < pattern.length(); ++i) {
2205             char c = pattern.charAt(i);
2206             if (inQuote) {
2207                 if (c == '\'') {
2208                     inQuote = false;
2209                 }
2210             }
2211             else {
2212                 if (c == '\'') {
2213                     inQuote = true;
2214                 } else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) {
2215                     int ci = from.indexOf(c);
2216                     if (ci >= 0) {
2217                         // patternChars is longer than localPatternChars due
2218                         // to serialization compatibility. The pattern letters
2219                         // unsupported by localPatternChars pass through.
2220                         if (ci < to.length()) {
2221                             c = to.charAt(ci);
2222                         }
2223                     } else {
2224                         throw new IllegalArgumentException("Illegal pattern " +
2225                                                            " character '" +
2226                                                            c + "'");
2227                     }
2228                 }
2229             }
2230             result.append(c);
2231         }
2232         if (inQuote) {
2233             throw new IllegalArgumentException("Unfinished quote in pattern");
2234         }
2235         return result.toString();
2236     }
2237 
2238     /**
2239      * Returns a pattern string describing this date format.
2240      *
2241      * @return a pattern string describing this date format.
2242      */
2243     public String toPattern() {
2244         return pattern;
2245     }
2246 
2247     /**
2248      * Returns a localized pattern string describing this date format.
2249      *
2250      * @return a localized pattern string describing this date format.
2251      */
2252     public String toLocalizedPattern() {
2253         return translatePattern(pattern,
2254                                 DateFormatSymbols.patternChars,
2255                                 formatData.getLocalPatternChars());
2256     }
2257 
2258     /**
2259      * Applies the given pattern string to this date format.
2260      *
2261      * @param pattern the new date and time pattern for this date format
2262      * @exception NullPointerException if the given pattern is null
2263      * @exception IllegalArgumentException if the given pattern is invalid
2264      */
2265     public void applyPattern(String pattern)
2266     {
2267         applyPatternImpl(pattern);
2268     }
2269 
2270     private void applyPatternImpl(String pattern) {
2271         compiledPattern = compile(pattern);
2272         this.pattern = pattern;
2273     }
2274 
2275     /**
2276      * Applies the given localized pattern string to this date format.
2277      *
2278      * @param pattern a String to be mapped to the new date and time format
2279      *        pattern for this format
2280      * @exception NullPointerException if the given pattern is null
2281      * @exception IllegalArgumentException if the given pattern is invalid
2282      */
2283     public void applyLocalizedPattern(String pattern) {
2284          String p = translatePattern(pattern,
2285                                      formatData.getLocalPatternChars(),
2286                                      DateFormatSymbols.patternChars);
2287          compiledPattern = compile(p);
2288          this.pattern = p;
2289     }
2290 
2291     /**
2292      * Gets a copy of the date and time format symbols of this date format.
2293      *
2294      * @return the date and time format symbols of this date format
2295      * @see #setDateFormatSymbols
2296      */
2297     public DateFormatSymbols getDateFormatSymbols()
2298     {
2299         return (DateFormatSymbols)formatData.clone();
2300     }
2301 
2302     /**
2303      * Sets the date and time format symbols of this date format.
2304      *
2305      * @param newFormatSymbols the new date and time format symbols
2306      * @exception NullPointerException if the given newFormatSymbols is null
2307      * @see #getDateFormatSymbols
2308      */
2309     public void setDateFormatSymbols(DateFormatSymbols newFormatSymbols)
2310     {
2311         this.formatData = (DateFormatSymbols)newFormatSymbols.clone();
2312         useDateFormatSymbols = true;
2313     }
2314 
2315     /**
2316      * Creates a copy of this <code>SimpleDateFormat</code>. This also
2317      * clones the format's date format symbols.
2318      *
2319      * @return a clone of this <code>SimpleDateFormat</code>
2320      */
2321     @Override
2322     public Object clone() {
2323         SimpleDateFormat other = (SimpleDateFormat) super.clone();
2324         other.formatData = (DateFormatSymbols) formatData.clone();
2325         return other;
2326     }
2327 
2328     /**
2329      * Returns the hash code value for this <code>SimpleDateFormat</code> object.
2330      *
2331      * @return the hash code value for this <code>SimpleDateFormat</code> object.
2332      */
2333     @Override
2334     public int hashCode()
2335     {
2336         return pattern.hashCode();
2337         // just enough fields for a reasonable distribution
2338     }
2339 
2340     /**
2341      * Compares the given object with this <code>SimpleDateFormat</code> for
2342      * equality.
2343      *
2344      * @return true if the given object is equal to this
2345      * <code>SimpleDateFormat</code>
2346      */
2347     @Override
2348     public boolean equals(Object obj)
2349     {
2350         if (!super.equals(obj)) {
2351             return false; // super does class check
2352         }
2353         SimpleDateFormat that = (SimpleDateFormat) obj;
2354         return (pattern.equals(that.pattern)
2355                 && formatData.equals(that.formatData));
2356     }
2357 
2358     private static final int[] REST_OF_STYLES = {
2359         Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT, Calendar.LONG_STANDALONE,
2360     };
2361     private Map<String, Integer> getDisplayNamesMap(int field, Locale locale) {
2362         Map<String, Integer> map = calendar.getDisplayNames(field, Calendar.SHORT_FORMAT, locale);
2363         // Get all SHORT and LONG styles (avoid NARROW styles).
2364         for (int style : REST_OF_STYLES) {
2365             Map<String, Integer> m = calendar.getDisplayNames(field, style, locale);
2366             if (m != null) {
2367                 map.putAll(m);
2368             }
2369         }
2370         return map;
2371     }
2372 
2373     /**
2374      * After reading an object from the input stream, the format
2375      * pattern in the object is verified.
2376      * <p>
2377      * @exception InvalidObjectException if the pattern is invalid
2378      */
2379     private void readObject(ObjectInputStream stream)
2380                          throws IOException, ClassNotFoundException {
2381         stream.defaultReadObject();
2382 
2383         try {
2384             compiledPattern = compile(pattern);
2385         } catch (Exception e) {
2386             throw new InvalidObjectException("invalid pattern");
2387         }
2388 
2389         if (serialVersionOnStream < 1) {
2390             // didn't have defaultCenturyStart field
2391             initializeDefaultCentury();
2392         }
2393         else {
2394             // fill in dependent transient field
2395             parseAmbiguousDatesAsAfter(defaultCenturyStart);
2396         }
2397         serialVersionOnStream = currentSerialVersion;
2398 
2399         // If the deserialized object has a SimpleTimeZone, try
2400         // to replace it with a ZoneInfo equivalent in order to
2401         // be compatible with the SimpleTimeZone-based
2402         // implementation as much as possible.
2403         TimeZone tz = getTimeZone();
2404         if (tz instanceof SimpleTimeZone) {
2405             String id = tz.getID();
2406             TimeZone zi = TimeZone.getTimeZone(id);
2407             if (zi != null && zi.hasSameRules(tz) && zi.getID().equals(id)) {
2408                 setTimeZone(zi);
2409             }
2410         }
2411     }
2412 
2413     /**
2414      * Analyze the negative subpattern of DecimalFormat and set/update values
2415      * as necessary.
2416      */
2417     private void checkNegativeNumberExpression() {
2418         if ((numberFormat instanceof DecimalFormat) &&
2419             !numberFormat.equals(originalNumberFormat)) {
2420             String numberPattern = ((DecimalFormat)numberFormat).toPattern();
2421             if (!numberPattern.equals(originalNumberPattern)) {
2422                 hasFollowingMinusSign = false;
2423 
2424                 int separatorIndex = numberPattern.indexOf(';');
2425                 // If the negative subpattern is not absent, we have to analayze
2426                 // it in order to check if it has a following minus sign.
2427                 if (separatorIndex > -1) {
2428                     int minusIndex = numberPattern.indexOf('-', separatorIndex);
2429                     if ((minusIndex > numberPattern.lastIndexOf('0')) &&
2430                         (minusIndex > numberPattern.lastIndexOf('#'))) {
2431                         hasFollowingMinusSign = true;
2432                         minusSign = ((DecimalFormat)numberFormat).getDecimalFormatSymbols().getMinusSign();
2433                     }
2434                 }
2435                 originalNumberPattern = numberPattern;
2436             }
2437             originalNumberFormat = numberFormat;
2438         }
2439     }
2440 
2441 }