1 /*
2 * Copyright (c) 2012, 2018, 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 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file:
31 *
32 * Copyright (c) 2007-2012, Stephen Colebourne & Michael Nascimento Santos
33 *
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions are met:
38 *
39 * * Redistributions of source code must retain the above copyright notice,
40 * this list of conditions and the following disclaimer.
41 *
42 * * Redistributions in binary form must reproduce the above copyright notice,
43 * this list of conditions and the following disclaimer in the documentation
44 * and/or other materials provided with the distribution.
45 *
46 * * Neither the name of JSR-310 nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
54 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
55 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
56 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
57 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
58 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
59 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
60 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
62 package java.time;
63
64 import static java.time.temporal.ChronoField.HOUR_OF_DAY;
65 import static java.time.temporal.ChronoField.MICRO_OF_DAY;
66 import static java.time.temporal.ChronoField.MINUTE_OF_HOUR;
67 import static java.time.temporal.ChronoField.NANO_OF_DAY;
68 import static java.time.temporal.ChronoField.NANO_OF_SECOND;
69 import static java.time.temporal.ChronoField.SECOND_OF_DAY;
70 import static java.time.temporal.ChronoField.SECOND_OF_MINUTE;
71 import static java.time.temporal.ChronoUnit.NANOS;
72
73 import java.io.DataInput;
74 import java.io.DataOutput;
75 import java.io.IOException;
76 import java.io.InvalidObjectException;
77 import java.io.ObjectInputStream;
78 import java.io.Serializable;
79 import java.time.format.DateTimeFormatter;
80 import java.time.format.DateTimeParseException;
81 import java.time.temporal.ChronoField;
82 import java.time.temporal.ChronoUnit;
83 import java.time.temporal.Temporal;
84 import java.time.temporal.TemporalAccessor;
85 import java.time.temporal.TemporalAdjuster;
86 import java.time.temporal.TemporalAmount;
87 import java.time.temporal.TemporalField;
88 import java.time.temporal.TemporalQueries;
89 import java.time.temporal.TemporalQuery;
90 import java.time.temporal.TemporalUnit;
91 import java.time.temporal.UnsupportedTemporalTypeException;
92 import java.time.temporal.ValueRange;
93 import java.util.Objects;
94
95 /**
96 * A time without a time-zone in the ISO-8601 calendar system,
97 * such as {@code 10:15:30}.
98 * <p>
99 * {@code LocalTime} is an immutable date-time object that represents a time,
100 * often viewed as hour-minute-second.
101 * Time is represented to nanosecond precision.
102 * For example, the value "13:45.30.123456789" can be stored in a {@code LocalTime}.
103 * <p>
104 * This class does not store or represent a date or time-zone.
105 * Instead, it is a description of the local time as seen on a wall clock.
106 * It cannot represent an instant on the time-line without additional information
107 * such as an offset or time-zone.
108 * <p>
109 * The ISO-8601 calendar system is the modern civil calendar system used today
110 * in most of the world. This API assumes that all calendar systems use the same
111 * representation, this class, for time-of-day.
112 *
113 * <p>
114 * This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
115 * class; use of identity-sensitive operations (including reference equality
116 * ({@code ==}), identity hash code, or synchronization) on instances of
117 * {@code LocalTime} may have unpredictable results and should be avoided.
118 * The {@code equals} method should be used for comparisons.
119 *
120 * @implSpec
121 * This class is immutable and thread-safe.
122 *
123 * @since 1.8
124 */
125 public final class LocalTime
126 implements Temporal, TemporalAdjuster, Comparable<LocalTime>, Serializable {
127
128 /**
129 * The minimum supported {@code LocalTime}, '00:00'.
130 * This is the time of midnight at the start of the day.
131 */
132 public static final LocalTime MIN;
133 /**
134 * The maximum supported {@code LocalTime}, '23:59:59.999999999'.
135 * This is the time just before midnight at the end of the day.
136 */
137 public static final LocalTime MAX;
138 /**
139 * The time of midnight at the start of the day, '00:00'.
140 */
141 public static final LocalTime MIDNIGHT;
142 /**
143 * The time of noon in the middle of the day, '12:00'.
144 */
145 public static final LocalTime NOON;
146 /**
147 * Constants for the local time of each hour.
148 */
149 private static final LocalTime[] HOURS = new LocalTime[24];
150 static {
151 for (int i = 0; i < HOURS.length; i++) {
152 HOURS[i] = new LocalTime(i, 0, 0, 0);
153 }
154 MIDNIGHT = HOURS[0];
155 NOON = HOURS[12];
156 MIN = HOURS[0];
157 MAX = new LocalTime(23, 59, 59, 999_999_999);
158 }
159
160 /**
161 * Hours per day.
162 */
163 static final int HOURS_PER_DAY = 24;
164 /**
165 * Minutes per hour.
166 */
167 static final int MINUTES_PER_HOUR = 60;
168 /**
169 * Minutes per day.
170 */
171 static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY;
172 /**
173 * Seconds per minute.
174 */
175 static final int SECONDS_PER_MINUTE = 60;
176 /**
177 * Seconds per hour.
178 */
179 static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR;
180 /**
181 * Seconds per day.
182 */
183 static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY;
184 /**
185 * Milliseconds per day.
186 */
187 static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L;
188 /**
189 * Microseconds per day.
190 */
191 static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L;
192 /**
193 * Nanos per millisecond.
194 */
195 static final long NANOS_PER_MILLI = 1000_000L;
196 /**
197 * Nanos per second.
198 */
199 static final long NANOS_PER_SECOND = 1000_000_000L;
200 /**
201 * Nanos per minute.
202 */
203 static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE;
204 /**
205 * Nanos per hour.
206 */
207 static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR;
208 /**
209 * Nanos per day.
210 */
211 static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY;
212
213 /**
214 * Serialization version.
215 */
216 private static final long serialVersionUID = 6414437269572265201L;
217
218 /**
219 * The hour.
220 */
221 private final byte hour;
222 /**
223 * The minute.
224 */
225 private final byte minute;
226 /**
227 * The second.
228 */
229 private final byte second;
230 /**
231 * The nanosecond.
232 */
233 private final int nano;
234
235 //-----------------------------------------------------------------------
236 /**
237 * Obtains the current time from the system clock in the default time-zone.
238 * <p>
239 * This will query the {@link Clock#systemDefaultZone() system clock} in the default
240 * time-zone to obtain the current time.
241 * <p>
242 * Using this method will prevent the ability to use an alternate clock for testing
243 * because the clock is hard-coded.
244 *
245 * @return the current time using the system clock and default time-zone, not null
246 */
247 public static LocalTime now() {
248 return now(Clock.systemDefaultZone());
249 }
250
251 /**
252 * Obtains the current time from the system clock in the specified time-zone.
253 * <p>
254 * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current time.
255 * Specifying the time-zone avoids dependence on the default time-zone.
256 * <p>
257 * Using this method will prevent the ability to use an alternate clock for testing
258 * because the clock is hard-coded.
259 *
260 * @param zone the zone ID to use, not null
261 * @return the current time using the system clock, not null
262 */
263 public static LocalTime now(ZoneId zone) {
264 return now(Clock.system(zone));
265 }
266
267 /**
268 * Obtains the current time from the specified clock.
269 * <p>
270 * This will query the specified clock to obtain the current time.
271 * Using this method allows the use of an alternate clock for testing.
272 * The alternate clock may be introduced using {@link Clock dependency injection}.
273 *
274 * @param clock the clock to use, not null
275 * @return the current time, not null
276 */
277 public static LocalTime now(Clock clock) {
278 Objects.requireNonNull(clock, "clock");
279 final Instant now = clock.instant(); // called once
280 return ofInstant(now, clock.getZone());
281 }
282
283 //-----------------------------------------------------------------------
284 /**
285 * Obtains an instance of {@code LocalTime} from an hour and minute.
286 * <p>
287 * This returns a {@code LocalTime} with the specified hour and minute.
288 * The second and nanosecond fields will be set to zero.
289 *
290 * @param hour the hour-of-day to represent, from 0 to 23
291 * @param minute the minute-of-hour to represent, from 0 to 59
292 * @return the local time, not null
293 * @throws DateTimeException if the value of any field is out of range
294 */
295 public static LocalTime of(int hour, int minute) {
296 HOUR_OF_DAY.checkValidValue(hour);
297 if (minute == 0) {
298 return HOURS[hour]; // for performance
299 }
300 MINUTE_OF_HOUR.checkValidValue(minute);
301 return new LocalTime(hour, minute, 0, 0);
302 }
303
304 /**
305 * Obtains an instance of {@code LocalTime} from an hour, minute and second.
306 * <p>
307 * This returns a {@code LocalTime} with the specified hour, minute and second.
308 * The nanosecond field will be set to zero.
309 *
310 * @param hour the hour-of-day to represent, from 0 to 23
311 * @param minute the minute-of-hour to represent, from 0 to 59
312 * @param second the second-of-minute to represent, from 0 to 59
313 * @return the local time, not null
314 * @throws DateTimeException if the value of any field is out of range
315 */
316 public static LocalTime of(int hour, int minute, int second) {
317 HOUR_OF_DAY.checkValidValue(hour);
318 if ((minute | second) == 0) {
319 return HOURS[hour]; // for performance
320 }
321 MINUTE_OF_HOUR.checkValidValue(minute);
322 SECOND_OF_MINUTE.checkValidValue(second);
323 return new LocalTime(hour, minute, second, 0);
324 }
325
326 /**
327 * Obtains an instance of {@code LocalTime} from an hour, minute, second and nanosecond.
328 * <p>
329 * This returns a {@code LocalTime} with the specified hour, minute, second and nanosecond.
330 *
331 * @param hour the hour-of-day to represent, from 0 to 23
332 * @param minute the minute-of-hour to represent, from 0 to 59
333 * @param second the second-of-minute to represent, from 0 to 59
334 * @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999
335 * @return the local time, not null
336 * @throws DateTimeException if the value of any field is out of range
337 */
338 public static LocalTime of(int hour, int minute, int second, int nanoOfSecond) {
339 HOUR_OF_DAY.checkValidValue(hour);
340 MINUTE_OF_HOUR.checkValidValue(minute);
341 SECOND_OF_MINUTE.checkValidValue(second);
342 NANO_OF_SECOND.checkValidValue(nanoOfSecond);
343 return create(hour, minute, second, nanoOfSecond);
344 }
345
346 /**
347 * Obtains an instance of {@code LocalTime} from an {@code Instant} and zone ID.
348 * <p>
349 * This creates a local time based on the specified instant.
350 * First, the offset from UTC/Greenwich is obtained using the zone ID and instant,
351 * which is simple as there is only one valid offset for each instant.
352 * Then, the instant and offset are used to calculate the local time.
353 *
354 * @param instant the instant to create the time from, not null
355 * @param zone the time-zone, which may be an offset, not null
356 * @return the local time, not null
357 * @since 9
358 */
359 public static LocalTime ofInstant(Instant instant, ZoneId zone) {
360 Objects.requireNonNull(instant, "instant");
361 Objects.requireNonNull(zone, "zone");
362 ZoneOffset offset = zone.getRules().getOffset(instant);
363 long localSecond = instant.getEpochSecond() + offset.getTotalSeconds();
364 int secsOfDay = Math.floorMod(localSecond, SECONDS_PER_DAY);
365 return ofNanoOfDay(secsOfDay * NANOS_PER_SECOND + instant.getNano());
366 }
367
368 //-----------------------------------------------------------------------
369 /**
370 * Obtains an instance of {@code LocalTime} from a second-of-day value.
371 * <p>
372 * This returns a {@code LocalTime} with the specified second-of-day.
373 * The nanosecond field will be set to zero.
374 *
375 * @param secondOfDay the second-of-day, from {@code 0} to {@code 24 * 60 * 60 - 1}
376 * @return the local time, not null
377 * @throws DateTimeException if the second-of-day value is invalid
378 */
379 public static LocalTime ofSecondOfDay(long secondOfDay) {
380 SECOND_OF_DAY.checkValidValue(secondOfDay);
381 int hours = (int) (secondOfDay / SECONDS_PER_HOUR);
382 secondOfDay -= hours * SECONDS_PER_HOUR;
383 int minutes = (int) (secondOfDay / SECONDS_PER_MINUTE);
384 secondOfDay -= minutes * SECONDS_PER_MINUTE;
385 return create(hours, minutes, (int) secondOfDay, 0);
386 }
387
388 /**
389 * Obtains an instance of {@code LocalTime} from a nanos-of-day value.
390 * <p>
391 * This returns a {@code LocalTime} with the specified nanosecond-of-day.
392 *
393 * @param nanoOfDay the nano of day, from {@code 0} to {@code 24 * 60 * 60 * 1,000,000,000 - 1}
394 * @return the local time, not null
395 * @throws DateTimeException if the nanos of day value is invalid
396 */
397 public static LocalTime ofNanoOfDay(long nanoOfDay) {
398 NANO_OF_DAY.checkValidValue(nanoOfDay);
399 int hours = (int) (nanoOfDay / NANOS_PER_HOUR);
400 nanoOfDay -= hours * NANOS_PER_HOUR;
401 int minutes = (int) (nanoOfDay / NANOS_PER_MINUTE);
402 nanoOfDay -= minutes * NANOS_PER_MINUTE;
403 int seconds = (int) (nanoOfDay / NANOS_PER_SECOND);
404 nanoOfDay -= seconds * NANOS_PER_SECOND;
405 return create(hours, minutes, seconds, (int) nanoOfDay);
406 }
407
408 //-----------------------------------------------------------------------
409 /**
410 * Obtains an instance of {@code LocalTime} from a temporal object.
411 * <p>
412 * This obtains a local time based on the specified temporal.
413 * A {@code TemporalAccessor} represents an arbitrary set of date and time information,
414 * which this factory converts to an instance of {@code LocalTime}.
415 * <p>
416 * The conversion uses the {@link TemporalQueries#localTime()} query, which relies
417 * on extracting the {@link ChronoField#NANO_OF_DAY NANO_OF_DAY} field.
418 * <p>
419 * This method matches the signature of the functional interface {@link TemporalQuery}
420 * allowing it to be used as a query via method reference, {@code LocalTime::from}.
421 *
422 * @param temporal the temporal object to convert, not null
423 * @return the local time, not null
424 * @throws DateTimeException if unable to convert to a {@code LocalTime}
425 */
426 public static LocalTime from(TemporalAccessor temporal) {
427 Objects.requireNonNull(temporal, "temporal");
428 LocalTime time = temporal.query(TemporalQueries.localTime());
429 if (time == null) {
430 throw new DateTimeException("Unable to obtain LocalTime from TemporalAccessor: " +
431 temporal + " of type " + temporal.getClass().getName());
432 }
433 return time;
434 }
435
436 //-----------------------------------------------------------------------
437 /**
438 * Obtains an instance of {@code LocalTime} from a text string such as {@code 10:15}.
439 * <p>
440 * The string must represent a valid time and is parsed using
441 * {@link java.time.format.DateTimeFormatter#ISO_LOCAL_TIME}.
442 *
443 * @param text the text to parse such as "10:15:30", not null
444 * @return the parsed local time, not null
445 * @throws DateTimeParseException if the text cannot be parsed
446 */
447 public static LocalTime parse(CharSequence text) {
448 return parse(text, DateTimeFormatter.ISO_LOCAL_TIME);
449 }
450
451 /**
452 * Obtains an instance of {@code LocalTime} from a text string using a specific formatter.
453 * <p>
454 * The text is parsed using the formatter, returning a time.
455 *
456 * @param text the text to parse, not null
457 * @param formatter the formatter to use, not null
458 * @return the parsed local time, not null
459 * @throws DateTimeParseException if the text cannot be parsed
460 */
461 public static LocalTime parse(CharSequence text, DateTimeFormatter formatter) {
462 Objects.requireNonNull(formatter, "formatter");
463 return formatter.parse(text, LocalTime::from);
464 }
465
466 //-----------------------------------------------------------------------
467 /**
468 * Creates a local time from the hour, minute, second and nanosecond fields.
469 * <p>
470 * This factory may return a cached value, but applications must not rely on this.
471 *
472 * @param hour the hour-of-day to represent, validated from 0 to 23
473 * @param minute the minute-of-hour to represent, validated from 0 to 59
474 * @param second the second-of-minute to represent, validated from 0 to 59
475 * @param nanoOfSecond the nano-of-second to represent, validated from 0 to 999,999,999
476 * @return the local time, not null
477 */
478 private static LocalTime create(int hour, int minute, int second, int nanoOfSecond) {
479 if ((minute | second | nanoOfSecond) == 0) {
480 return HOURS[hour];
481 }
482 return new LocalTime(hour, minute, second, nanoOfSecond);
483 }
484
485 /**
486 * Constructor, previously validated.
487 *
488 * @param hour the hour-of-day to represent, validated from 0 to 23
489 * @param minute the minute-of-hour to represent, validated from 0 to 59
490 * @param second the second-of-minute to represent, validated from 0 to 59
491 * @param nanoOfSecond the nano-of-second to represent, validated from 0 to 999,999,999
492 */
493 private LocalTime(int hour, int minute, int second, int nanoOfSecond) {
494 this.hour = (byte) hour;
495 this.minute = (byte) minute;
496 this.second = (byte) second;
497 this.nano = nanoOfSecond;
498 }
499
500 //-----------------------------------------------------------------------
501 /**
502 * Checks if the specified field is supported.
503 * <p>
504 * This checks if this time can be queried for the specified field.
505 * If false, then calling the {@link #range(TemporalField) range},
506 * {@link #get(TemporalField) get} and {@link #with(TemporalField, long)}
507 * methods will throw an exception.
508 * <p>
509 * If the field is a {@link ChronoField} then the query is implemented here.
510 * The supported fields are:
511 * <ul>
512 * <li>{@code NANO_OF_SECOND}
513 * <li>{@code NANO_OF_DAY}
514 * <li>{@code MICRO_OF_SECOND}
515 * <li>{@code MICRO_OF_DAY}
516 * <li>{@code MILLI_OF_SECOND}
517 * <li>{@code MILLI_OF_DAY}
518 * <li>{@code SECOND_OF_MINUTE}
519 * <li>{@code SECOND_OF_DAY}
520 * <li>{@code MINUTE_OF_HOUR}
521 * <li>{@code MINUTE_OF_DAY}
522 * <li>{@code HOUR_OF_AMPM}
523 * <li>{@code CLOCK_HOUR_OF_AMPM}
524 * <li>{@code HOUR_OF_DAY}
525 * <li>{@code CLOCK_HOUR_OF_DAY}
526 * <li>{@code AMPM_OF_DAY}
527 * </ul>
528 * All other {@code ChronoField} instances will return false.
529 * <p>
530 * If the field is not a {@code ChronoField}, then the result of this method
531 * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)}
532 * passing {@code this} as the argument.
533 * Whether the field is supported is determined by the field.
534 *
535 * @param field the field to check, null returns false
536 * @return true if the field is supported on this time, false if not
537 */
538 @Override
539 public boolean isSupported(TemporalField field) {
540 if (field instanceof ChronoField) {
541 return field.isTimeBased();
542 }
543 return field != null && field.isSupportedBy(this);
544 }
545
546 /**
547 * Checks if the specified unit is supported.
548 * <p>
549 * This checks if the specified unit can be added to, or subtracted from, this time.
550 * If false, then calling the {@link #plus(long, TemporalUnit)} and
551 * {@link #minus(long, TemporalUnit) minus} methods will throw an exception.
552 * <p>
553 * If the unit is a {@link ChronoUnit} then the query is implemented here.
554 * The supported units are:
555 * <ul>
556 * <li>{@code NANOS}
557 * <li>{@code MICROS}
558 * <li>{@code MILLIS}
559 * <li>{@code SECONDS}
560 * <li>{@code MINUTES}
561 * <li>{@code HOURS}
562 * <li>{@code HALF_DAYS}
563 * </ul>
564 * All other {@code ChronoUnit} instances will return false.
565 * <p>
566 * If the unit is not a {@code ChronoUnit}, then the result of this method
567 * is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)}
568 * passing {@code this} as the argument.
569 * Whether the unit is supported is determined by the unit.
570 *
571 * @param unit the unit to check, null returns false
572 * @return true if the unit can be added/subtracted, false if not
573 */
574 @Override // override for Javadoc
575 public boolean isSupported(TemporalUnit unit) {
576 if (unit instanceof ChronoUnit) {
577 return unit.isTimeBased();
578 }
579 return unit != null && unit.isSupportedBy(this);
580 }
581
582 //-----------------------------------------------------------------------
583 /**
584 * Gets the range of valid values for the specified field.
585 * <p>
586 * The range object expresses the minimum and maximum valid values for a field.
587 * This time is used to enhance the accuracy of the returned range.
588 * If it is not possible to return the range, because the field is not supported
589 * or for some other reason, an exception is thrown.
590 * <p>
591 * If the field is a {@link ChronoField} then the query is implemented here.
592 * The {@link #isSupported(TemporalField) supported fields} will return
593 * appropriate range instances.
594 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
595 * <p>
596 * If the field is not a {@code ChronoField}, then the result of this method
597 * is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)}
598 * passing {@code this} as the argument.
599 * Whether the range can be obtained is determined by the field.
600 *
601 * @param field the field to query the range for, not null
602 * @return the range of valid values for the field, not null
603 * @throws DateTimeException if the range for the field cannot be obtained
604 * @throws UnsupportedTemporalTypeException if the field is not supported
605 */
606 @Override // override for Javadoc
607 public ValueRange range(TemporalField field) {
608 return Temporal.super.range(field);
609 }
610
611 /**
612 * Gets the value of the specified field from this time as an {@code int}.
613 * <p>
614 * This queries this time for the value of the specified field.
615 * The returned value will always be within the valid range of values for the field.
616 * If it is not possible to return the value, because the field is not supported
617 * or for some other reason, an exception is thrown.
618 * <p>
619 * If the field is a {@link ChronoField} then the query is implemented here.
620 * The {@link #isSupported(TemporalField) supported fields} will return valid
621 * values based on this time, except {@code NANO_OF_DAY} and {@code MICRO_OF_DAY}
622 * which are too large to fit in an {@code int} and throw an {@code UnsupportedTemporalTypeException}.
623 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
624 * <p>
625 * If the field is not a {@code ChronoField}, then the result of this method
626 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
627 * passing {@code this} as the argument. Whether the value can be obtained,
628 * and what the value represents, is determined by the field.
629 *
630 * @param field the field to get, not null
631 * @return the value for the field
632 * @throws DateTimeException if a value for the field cannot be obtained or
633 * the value is outside the range of valid values for the field
634 * @throws UnsupportedTemporalTypeException if the field is not supported or
635 * the range of values exceeds an {@code int}
636 * @throws ArithmeticException if numeric overflow occurs
637 */
638 @Override // override for Javadoc and performance
639 public int get(TemporalField field) {
640 if (field instanceof ChronoField) {
641 return get0(field);
642 }
643 return Temporal.super.get(field);
644 }
645
646 /**
647 * Gets the value of the specified field from this time as a {@code long}.
648 * <p>
649 * This queries this time for the value of the specified field.
650 * If it is not possible to return the value, because the field is not supported
651 * or for some other reason, an exception is thrown.
652 * <p>
653 * If the field is a {@link ChronoField} then the query is implemented here.
654 * The {@link #isSupported(TemporalField) supported fields} will return valid
655 * values based on this time.
656 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
657 * <p>
658 * If the field is not a {@code ChronoField}, then the result of this method
659 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)}
660 * passing {@code this} as the argument. Whether the value can be obtained,
661 * and what the value represents, is determined by the field.
662 *
663 * @param field the field to get, not null
664 * @return the value for the field
665 * @throws DateTimeException if a value for the field cannot be obtained
666 * @throws UnsupportedTemporalTypeException if the field is not supported
667 * @throws ArithmeticException if numeric overflow occurs
668 */
669 @Override
670 public long getLong(TemporalField field) {
671 if (field instanceof ChronoField) {
672 if (field == NANO_OF_DAY) {
673 return toNanoOfDay();
674 }
675 if (field == MICRO_OF_DAY) {
676 return toNanoOfDay() / 1000;
677 }
678 return get0(field);
679 }
680 return field.getFrom(this);
681 }
682
683 private int get0(TemporalField field) {
684 switch ((ChronoField) field) {
685 case NANO_OF_SECOND: return nano;
686 case NANO_OF_DAY: throw new UnsupportedTemporalTypeException("Invalid field 'NanoOfDay' for get() method, use getLong() instead");
687 case MICRO_OF_SECOND: return nano / 1000;
688 case MICRO_OF_DAY: throw new UnsupportedTemporalTypeException("Invalid field 'MicroOfDay' for get() method, use getLong() instead");
689 case MILLI_OF_SECOND: return nano / 1000_000;
690 case MILLI_OF_DAY: return (int) (toNanoOfDay() / 1000_000);
691 case SECOND_OF_MINUTE: return second;
692 case SECOND_OF_DAY: return toSecondOfDay();
693 case MINUTE_OF_HOUR: return minute;
694 case MINUTE_OF_DAY: return hour * 60 + minute;
695 case HOUR_OF_AMPM: return hour % 12;
696 case CLOCK_HOUR_OF_AMPM: int ham = hour % 12; return (ham % 12 == 0 ? 12 : ham);
697 case HOUR_OF_DAY: return hour;
698 case CLOCK_HOUR_OF_DAY: return (hour == 0 ? 24 : hour);
699 case AMPM_OF_DAY: return hour / 12;
700 }
701 throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
702 }
703
704 //-----------------------------------------------------------------------
705 /**
706 * Gets the hour-of-day field.
707 *
708 * @return the hour-of-day, from 0 to 23
709 */
710 public int getHour() {
711 return hour;
712 }
713
714 /**
715 * Gets the minute-of-hour field.
716 *
717 * @return the minute-of-hour, from 0 to 59
718 */
719 public int getMinute() {
720 return minute;
721 }
722
723 /**
724 * Gets the second-of-minute field.
725 *
726 * @return the second-of-minute, from 0 to 59
727 */
728 public int getSecond() {
729 return second;
730 }
731
732 /**
733 * Gets the nano-of-second field.
734 *
735 * @return the nano-of-second, from 0 to 999,999,999
736 */
737 public int getNano() {
738 return nano;
739 }
740
741 //-----------------------------------------------------------------------
742 /**
743 * Returns an adjusted copy of this time.
744 * <p>
745 * This returns a {@code LocalTime}, based on this one, with the time adjusted.
746 * The adjustment takes place using the specified adjuster strategy object.
747 * Read the documentation of the adjuster to understand what adjustment will be made.
748 * <p>
749 * A simple adjuster might simply set the one of the fields, such as the hour field.
750 * A more complex adjuster might set the time to the last hour of the day.
751 * <p>
752 * The result of this method is obtained by invoking the
753 * {@link TemporalAdjuster#adjustInto(Temporal)} method on the
754 * specified adjuster passing {@code this} as the argument.
755 * <p>
756 * This instance is immutable and unaffected by this method call.
757 *
758 * @param adjuster the adjuster to use, not null
759 * @return a {@code LocalTime} based on {@code this} with the adjustment made, not null
760 * @throws DateTimeException if the adjustment cannot be made
761 * @throws ArithmeticException if numeric overflow occurs
762 */
763 @Override
764 public LocalTime with(TemporalAdjuster adjuster) {
765 // optimizations
766 if (adjuster instanceof LocalTime) {
767 return (LocalTime) adjuster;
768 }
769 return (LocalTime) adjuster.adjustInto(this);
770 }
771
772 /**
773 * Returns a copy of this time with the specified field set to a new value.
774 * <p>
775 * This returns a {@code LocalTime}, based on this one, with the value
776 * for the specified field changed.
777 * This can be used to change any supported field, such as the hour, minute or second.
778 * If it is not possible to set the value, because the field is not supported or for
779 * some other reason, an exception is thrown.
780 * <p>
781 * If the field is a {@link ChronoField} then the adjustment is implemented here.
782 * The supported fields behave as follows:
783 * <ul>
784 * <li>{@code NANO_OF_SECOND} -
785 * Returns a {@code LocalTime} with the specified nano-of-second.
786 * The hour, minute and second will be unchanged.
787 * <li>{@code NANO_OF_DAY} -
788 * Returns a {@code LocalTime} with the specified nano-of-day.
789 * This completely replaces the time and is equivalent to {@link #ofNanoOfDay(long)}.
790 * <li>{@code MICRO_OF_SECOND} -
791 * Returns a {@code LocalTime} with the nano-of-second replaced by the specified
792 * micro-of-second multiplied by 1,000.
793 * The hour, minute and second will be unchanged.
794 * <li>{@code MICRO_OF_DAY} -
795 * Returns a {@code LocalTime} with the specified micro-of-day.
796 * This completely replaces the time and is equivalent to using {@link #ofNanoOfDay(long)}
797 * with the micro-of-day multiplied by 1,000.
798 * <li>{@code MILLI_OF_SECOND} -
799 * Returns a {@code LocalTime} with the nano-of-second replaced by the specified
800 * milli-of-second multiplied by 1,000,000.
801 * The hour, minute and second will be unchanged.
802 * <li>{@code MILLI_OF_DAY} -
803 * Returns a {@code LocalTime} with the specified milli-of-day.
804 * This completely replaces the time and is equivalent to using {@link #ofNanoOfDay(long)}
805 * with the milli-of-day multiplied by 1,000,000.
806 * <li>{@code SECOND_OF_MINUTE} -
807 * Returns a {@code LocalTime} with the specified second-of-minute.
808 * The hour, minute and nano-of-second will be unchanged.
809 * <li>{@code SECOND_OF_DAY} -
810 * Returns a {@code LocalTime} with the specified second-of-day.
811 * The nano-of-second will be unchanged.
812 * <li>{@code MINUTE_OF_HOUR} -
813 * Returns a {@code LocalTime} with the specified minute-of-hour.
814 * The hour, second-of-minute and nano-of-second will be unchanged.
815 * <li>{@code MINUTE_OF_DAY} -
816 * Returns a {@code LocalTime} with the specified minute-of-day.
817 * The second-of-minute and nano-of-second will be unchanged.
818 * <li>{@code HOUR_OF_AMPM} -
819 * Returns a {@code LocalTime} with the specified hour-of-am-pm.
820 * The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged.
821 * <li>{@code CLOCK_HOUR_OF_AMPM} -
822 * Returns a {@code LocalTime} with the specified clock-hour-of-am-pm.
823 * The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged.
824 * <li>{@code HOUR_OF_DAY} -
825 * Returns a {@code LocalTime} with the specified hour-of-day.
826 * The minute-of-hour, second-of-minute and nano-of-second will be unchanged.
827 * <li>{@code CLOCK_HOUR_OF_DAY} -
828 * Returns a {@code LocalTime} with the specified clock-hour-of-day.
829 * The minute-of-hour, second-of-minute and nano-of-second will be unchanged.
830 * <li>{@code AMPM_OF_DAY} -
831 * Returns a {@code LocalTime} with the specified AM/PM.
832 * The hour-of-am-pm, minute-of-hour, second-of-minute and nano-of-second will be unchanged.
833 * </ul>
834 * <p>
835 * In all cases, if the new value is outside the valid range of values for the field
836 * then a {@code DateTimeException} will be thrown.
837 * <p>
838 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}.
839 * <p>
840 * If the field is not a {@code ChronoField}, then the result of this method
841 * is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)}
842 * passing {@code this} as the argument. In this case, the field determines
843 * whether and how to adjust the instant.
844 * <p>
845 * This instance is immutable and unaffected by this method call.
846 *
847 * @param field the field to set in the result, not null
848 * @param newValue the new value of the field in the result
849 * @return a {@code LocalTime} based on {@code this} with the specified field set, not null
850 * @throws DateTimeException if the field cannot be set
851 * @throws UnsupportedTemporalTypeException if the field is not supported
852 * @throws ArithmeticException if numeric overflow occurs
853 */
854 @Override
855 public LocalTime with(TemporalField field, long newValue) {
856 if (field instanceof ChronoField) {
857 ChronoField f = (ChronoField) field;
858 f.checkValidValue(newValue);
859 switch (f) {
860 case NANO_OF_SECOND: return withNano((int) newValue);
861 case NANO_OF_DAY: return LocalTime.ofNanoOfDay(newValue);
862 case MICRO_OF_SECOND: return withNano((int) newValue * 1000);
863 case MICRO_OF_DAY: return LocalTime.ofNanoOfDay(newValue * 1000);
864 case MILLI_OF_SECOND: return withNano((int) newValue * 1000_000);
865 case MILLI_OF_DAY: return LocalTime.ofNanoOfDay(newValue * 1000_000);
866 case SECOND_OF_MINUTE: return withSecond((int) newValue);
867 case SECOND_OF_DAY: return plusSeconds(newValue - toSecondOfDay());
868 case MINUTE_OF_HOUR: return withMinute((int) newValue);
869 case MINUTE_OF_DAY: return plusMinutes(newValue - (hour * 60 + minute));
870 case HOUR_OF_AMPM: return plusHours(newValue - (hour % 12));
871 case CLOCK_HOUR_OF_AMPM: return plusHours((newValue == 12 ? 0 : newValue) - (hour % 12));
872 case HOUR_OF_DAY: return withHour((int) newValue);
873 case CLOCK_HOUR_OF_DAY: return withHour((int) (newValue == 24 ? 0 : newValue));
874 case AMPM_OF_DAY: return plusHours((newValue - (hour / 12)) * 12);
875 }
876 throw new UnsupportedTemporalTypeException("Unsupported field: " + field);
877 }
878 return field.adjustInto(this, newValue);
879 }
880
881 //-----------------------------------------------------------------------
882 /**
883 * Returns a copy of this {@code LocalTime} with the hour-of-day altered.
884 * <p>
885 * This instance is immutable and unaffected by this method call.
886 *
887 * @param hour the hour-of-day to set in the result, from 0 to 23
888 * @return a {@code LocalTime} based on this time with the requested hour, not null
889 * @throws DateTimeException if the hour value is invalid
890 */
891 public LocalTime withHour(int hour) {
892 if (this.hour == hour) {
893 return this;
894 }
895 HOUR_OF_DAY.checkValidValue(hour);
896 return create(hour, minute, second, nano);
897 }
898
899 /**
900 * Returns a copy of this {@code LocalTime} with the minute-of-hour altered.
901 * <p>
902 * This instance is immutable and unaffected by this method call.
903 *
904 * @param minute the minute-of-hour to set in the result, from 0 to 59
905 * @return a {@code LocalTime} based on this time with the requested minute, not null
906 * @throws DateTimeException if the minute value is invalid
907 */
908 public LocalTime withMinute(int minute) {
909 if (this.minute == minute) {
910 return this;
911 }
912 MINUTE_OF_HOUR.checkValidValue(minute);
913 return create(hour, minute, second, nano);
914 }
915
916 /**
917 * Returns a copy of this {@code LocalTime} with the second-of-minute altered.
918 * <p>
919 * This instance is immutable and unaffected by this method call.
920 *
921 * @param second the second-of-minute to set in the result, from 0 to 59
922 * @return a {@code LocalTime} based on this time with the requested second, not null
923 * @throws DateTimeException if the second value is invalid
924 */
925 public LocalTime withSecond(int second) {
926 if (this.second == second) {
927 return this;
928 }
929 SECOND_OF_MINUTE.checkValidValue(second);
930 return create(hour, minute, second, nano);
931 }
932
933 /**
934 * Returns a copy of this {@code LocalTime} with the nano-of-second altered.
935 * <p>
936 * This instance is immutable and unaffected by this method call.
937 *
938 * @param nanoOfSecond the nano-of-second to set in the result, from 0 to 999,999,999
939 * @return a {@code LocalTime} based on this time with the requested nanosecond, not null
940 * @throws DateTimeException if the nanos value is invalid
941 */
942 public LocalTime withNano(int nanoOfSecond) {
943 if (this.nano == nanoOfSecond) {
944 return this;
945 }
946 NANO_OF_SECOND.checkValidValue(nanoOfSecond);
947 return create(hour, minute, second, nanoOfSecond);
948 }
949
950 //-----------------------------------------------------------------------
951 /**
952 * Returns a copy of this {@code LocalTime} with the time truncated.
953 * <p>
954 * Truncation returns a copy of the original time with fields
955 * smaller than the specified unit set to zero.
956 * For example, truncating with the {@link ChronoUnit#MINUTES minutes} unit
957 * will set the second-of-minute and nano-of-second field to zero.
958 * <p>
959 * The unit must have a {@linkplain TemporalUnit#getDuration() duration}
960 * that divides into the length of a standard day without remainder.
961 * This includes all supplied time units on {@link ChronoUnit} and
962 * {@link ChronoUnit#DAYS DAYS}. Other units throw an exception.
963 * <p>
964 * This instance is immutable and unaffected by this method call.
965 *
966 * @param unit the unit to truncate to, not null
967 * @return a {@code LocalTime} based on this time with the time truncated, not null
968 * @throws DateTimeException if unable to truncate
969 * @throws UnsupportedTemporalTypeException if the unit is not supported
970 */
971 public LocalTime truncatedTo(TemporalUnit unit) {
972 if (unit == ChronoUnit.NANOS) {
973 return this;
974 }
975 Duration unitDur = unit.getDuration();
976 if (unitDur.getSeconds() > SECONDS_PER_DAY) {
977 throw new UnsupportedTemporalTypeException("Unit is too large to be used for truncation");
978 }
979 long dur = unitDur.toNanos();
980 if ((NANOS_PER_DAY % dur) != 0) {
981 throw new UnsupportedTemporalTypeException("Unit must divide into a standard day without remainder");
982 }
983 long nod = toNanoOfDay();
984 return ofNanoOfDay((nod / dur) * dur);
985 }
986
987 //-----------------------------------------------------------------------
988 /**
989 * Returns a copy of this time with the specified amount added.
990 * <p>
991 * This returns a {@code LocalTime}, based on this one, with the specified amount added.
992 * The amount is typically {@link Duration} but may be any other type implementing
993 * the {@link TemporalAmount} interface.
994 * <p>
995 * The calculation is delegated to the amount object by calling
996 * {@link TemporalAmount#addTo(Temporal)}. The amount implementation is free
997 * to implement the addition in any way it wishes, however it typically
998 * calls back to {@link #plus(long, TemporalUnit)}. Consult the documentation
999 * of the amount implementation to determine if it can be successfully added.
1000 * <p>
1001 * This instance is immutable and unaffected by this method call.
1002 *
1003 * @param amountToAdd the amount to add, not null
1004 * @return a {@code LocalTime} based on this time with the addition made, not null
1005 * @throws DateTimeException if the addition cannot be made
1006 * @throws ArithmeticException if numeric overflow occurs
1007 */
1008 @Override
1009 public LocalTime plus(TemporalAmount amountToAdd) {
1010 return (LocalTime) amountToAdd.addTo(this);
1011 }
1012
1013 /**
1014 * Returns a copy of this time with the specified amount added.
1015 * <p>
1016 * This returns a {@code LocalTime}, based on this one, with the amount
1017 * in terms of the unit added. If it is not possible to add the amount, because the
1018 * unit is not supported or for some other reason, an exception is thrown.
1019 * <p>
1020 * If the field is a {@link ChronoUnit} then the addition is implemented here.
1021 * The supported fields behave as follows:
1022 * <ul>
1023 * <li>{@code NANOS} -
1024 * Returns a {@code LocalTime} with the specified number of nanoseconds added.
1025 * This is equivalent to {@link #plusNanos(long)}.
1026 * <li>{@code MICROS} -
1027 * Returns a {@code LocalTime} with the specified number of microseconds added.
1028 * This is equivalent to {@link #plusNanos(long)} with the amount
1029 * multiplied by 1,000.
1030 * <li>{@code MILLIS} -
1031 * Returns a {@code LocalTime} with the specified number of milliseconds added.
1032 * This is equivalent to {@link #plusNanos(long)} with the amount
1033 * multiplied by 1,000,000.
1034 * <li>{@code SECONDS} -
1035 * Returns a {@code LocalTime} with the specified number of seconds added.
1036 * This is equivalent to {@link #plusSeconds(long)}.
1037 * <li>{@code MINUTES} -
1038 * Returns a {@code LocalTime} with the specified number of minutes added.
1039 * This is equivalent to {@link #plusMinutes(long)}.
1040 * <li>{@code HOURS} -
1041 * Returns a {@code LocalTime} with the specified number of hours added.
1042 * This is equivalent to {@link #plusHours(long)}.
1043 * <li>{@code HALF_DAYS} -
1044 * Returns a {@code LocalTime} with the specified number of half-days added.
1045 * This is equivalent to {@link #plusHours(long)} with the amount
1046 * multiplied by 12.
1047 * </ul>
1048 * <p>
1049 * All other {@code ChronoUnit} instances will throw an {@code UnsupportedTemporalTypeException}.
1050 * <p>
1051 * If the field is not a {@code ChronoUnit}, then the result of this method
1052 * is obtained by invoking {@code TemporalUnit.addTo(Temporal, long)}
1053 * passing {@code this} as the argument. In this case, the unit determines
1054 * whether and how to perform the addition.
1055 * <p>
1056 * This instance is immutable and unaffected by this method call.
1057 *
1058 * @param amountToAdd the amount of the unit to add to the result, may be negative
1059 * @param unit the unit of the amount to add, not null
1060 * @return a {@code LocalTime} based on this time with the specified amount added, not null
1061 * @throws DateTimeException if the addition cannot be made
1062 * @throws UnsupportedTemporalTypeException if the unit is not supported
1063 * @throws ArithmeticException if numeric overflow occurs
1064 */
1065 @Override
1066 public LocalTime plus(long amountToAdd, TemporalUnit unit) {
1067 if (unit instanceof ChronoUnit) {
1068 switch ((ChronoUnit) unit) {
1069 case NANOS: return plusNanos(amountToAdd);
1070 case MICROS: return plusNanos((amountToAdd % MICROS_PER_DAY) * 1000);
1071 case MILLIS: return plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000_000);
1072 case SECONDS: return plusSeconds(amountToAdd);
1073 case MINUTES: return plusMinutes(amountToAdd);
1074 case HOURS: return plusHours(amountToAdd);
1075 case HALF_DAYS: return plusHours((amountToAdd % 2) * 12);
1076 }
1077 throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
1078 }
1079 return unit.addTo(this, amountToAdd);
1080 }
1081
1082 //-----------------------------------------------------------------------
1083 /**
1084 * Returns a copy of this {@code LocalTime} with the specified number of hours added.
1085 * <p>
1086 * This adds the specified number of hours to this time, returning a new time.
1087 * The calculation wraps around midnight.
1088 * <p>
1089 * This instance is immutable and unaffected by this method call.
1090 *
1091 * @param hoursToAdd the hours to add, may be negative
1092 * @return a {@code LocalTime} based on this time with the hours added, not null
1093 */
1094 public LocalTime plusHours(long hoursToAdd) {
1095 if (hoursToAdd == 0) {
1096 return this;
1097 }
1098 int newHour = ((int) (hoursToAdd % HOURS_PER_DAY) + hour + HOURS_PER_DAY) % HOURS_PER_DAY;
1099 return create(newHour, minute, second, nano);
1100 }
1101
1102 /**
1103 * Returns a copy of this {@code LocalTime} with the specified number of minutes added.
1104 * <p>
1105 * This adds the specified number of minutes to this time, returning a new time.
1106 * The calculation wraps around midnight.
1107 * <p>
1108 * This instance is immutable and unaffected by this method call.
1109 *
1110 * @param minutesToAdd the minutes to add, may be negative
1111 * @return a {@code LocalTime} based on this time with the minutes added, not null
1112 */
1113 public LocalTime plusMinutes(long minutesToAdd) {
1114 if (minutesToAdd == 0) {
1115 return this;
1116 }
1117 int mofd = hour * MINUTES_PER_HOUR + minute;
1118 int newMofd = ((int) (minutesToAdd % MINUTES_PER_DAY) + mofd + MINUTES_PER_DAY) % MINUTES_PER_DAY;
1119 if (mofd == newMofd) {
1120 return this;
1121 }
1122 int newHour = newMofd / MINUTES_PER_HOUR;
1123 int newMinute = newMofd % MINUTES_PER_HOUR;
1124 return create(newHour, newMinute, second, nano);
1125 }
1126
1127 /**
1128 * Returns a copy of this {@code LocalTime} with the specified number of seconds added.
1129 * <p>
1130 * This adds the specified number of seconds to this time, returning a new time.
1131 * The calculation wraps around midnight.
1132 * <p>
1133 * This instance is immutable and unaffected by this method call.
1134 *
1135 * @param secondstoAdd the seconds to add, may be negative
1136 * @return a {@code LocalTime} based on this time with the seconds added, not null
1137 */
1138 public LocalTime plusSeconds(long secondstoAdd) {
1139 if (secondstoAdd == 0) {
1140 return this;
1141 }
1142 int sofd = hour * SECONDS_PER_HOUR +
1143 minute * SECONDS_PER_MINUTE + second;
1144 int newSofd = ((int) (secondstoAdd % SECONDS_PER_DAY) + sofd + SECONDS_PER_DAY) % SECONDS_PER_DAY;
1145 if (sofd == newSofd) {
1146 return this;
1147 }
1148 int newHour = newSofd / SECONDS_PER_HOUR;
1149 int newMinute = (newSofd / SECONDS_PER_MINUTE) % MINUTES_PER_HOUR;
1150 int newSecond = newSofd % SECONDS_PER_MINUTE;
1151 return create(newHour, newMinute, newSecond, nano);
1152 }
1153
1154 /**
1155 * Returns a copy of this {@code LocalTime} with the specified number of nanoseconds added.
1156 * <p>
1157 * This adds the specified number of nanoseconds to this time, returning a new time.
1158 * The calculation wraps around midnight.
1159 * <p>
1160 * This instance is immutable and unaffected by this method call.
1161 *
1162 * @param nanosToAdd the nanos to add, may be negative
1163 * @return a {@code LocalTime} based on this time with the nanoseconds added, not null
1164 */
1165 public LocalTime plusNanos(long nanosToAdd) {
1166 if (nanosToAdd == 0) {
1167 return this;
1168 }
1169 long nofd = toNanoOfDay();
1170 long newNofd = ((nanosToAdd % NANOS_PER_DAY) + nofd + NANOS_PER_DAY) % NANOS_PER_DAY;
1171 if (nofd == newNofd) {
1172 return this;
1173 }
1174 int newHour = (int) (newNofd / NANOS_PER_HOUR);
1175 int newMinute = (int) ((newNofd / NANOS_PER_MINUTE) % MINUTES_PER_HOUR);
1176 int newSecond = (int) ((newNofd / NANOS_PER_SECOND) % SECONDS_PER_MINUTE);
1177 int newNano = (int) (newNofd % NANOS_PER_SECOND);
1178 return create(newHour, newMinute, newSecond, newNano);
1179 }
1180
1181 //-----------------------------------------------------------------------
1182 /**
1183 * Returns a copy of this time with the specified amount subtracted.
1184 * <p>
1185 * This returns a {@code LocalTime}, based on this one, with the specified amount subtracted.
1186 * The amount is typically {@link Duration} but may be any other type implementing
1187 * the {@link TemporalAmount} interface.
1188 * <p>
1189 * The calculation is delegated to the amount object by calling
1190 * {@link TemporalAmount#subtractFrom(Temporal)}. The amount implementation is free
1191 * to implement the subtraction in any way it wishes, however it typically
1192 * calls back to {@link #minus(long, TemporalUnit)}. Consult the documentation
1193 * of the amount implementation to determine if it can be successfully subtracted.
1194 * <p>
1195 * This instance is immutable and unaffected by this method call.
1196 *
1197 * @param amountToSubtract the amount to subtract, not null
1198 * @return a {@code LocalTime} based on this time with the subtraction made, not null
1199 * @throws DateTimeException if the subtraction cannot be made
1200 * @throws ArithmeticException if numeric overflow occurs
1201 */
1202 @Override
1203 public LocalTime minus(TemporalAmount amountToSubtract) {
1204 return (LocalTime) amountToSubtract.subtractFrom(this);
1205 }
1206
1207 /**
1208 * Returns a copy of this time with the specified amount subtracted.
1209 * <p>
1210 * This returns a {@code LocalTime}, based on this one, with the amount
1211 * in terms of the unit subtracted. If it is not possible to subtract the amount,
1212 * because the unit is not supported or for some other reason, an exception is thrown.
1213 * <p>
1214 * This method is equivalent to {@link #plus(long, TemporalUnit)} with the amount negated.
1215 * See that method for a full description of how addition, and thus subtraction, works.
1216 * <p>
1217 * This instance is immutable and unaffected by this method call.
1218 *
1219 * @param amountToSubtract the amount of the unit to subtract from the result, may be negative
1220 * @param unit the unit of the amount to subtract, not null
1221 * @return a {@code LocalTime} based on this time with the specified amount subtracted, not null
1222 * @throws DateTimeException if the subtraction cannot be made
1223 * @throws UnsupportedTemporalTypeException if the unit is not supported
1224 * @throws ArithmeticException if numeric overflow occurs
1225 */
1226 @Override
1227 public LocalTime minus(long amountToSubtract, TemporalUnit unit) {
1228 return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit));
1229 }
1230
1231 //-----------------------------------------------------------------------
1232 /**
1233 * Returns a copy of this {@code LocalTime} with the specified number of hours subtracted.
1234 * <p>
1235 * This subtracts the specified number of hours from this time, returning a new time.
1236 * The calculation wraps around midnight.
1237 * <p>
1238 * This instance is immutable and unaffected by this method call.
1239 *
1240 * @param hoursToSubtract the hours to subtract, may be negative
1241 * @return a {@code LocalTime} based on this time with the hours subtracted, not null
1242 */
1243 public LocalTime minusHours(long hoursToSubtract) {
1244 return plusHours(-(hoursToSubtract % HOURS_PER_DAY));
1245 }
1246
1247 /**
1248 * Returns a copy of this {@code LocalTime} with the specified number of minutes subtracted.
1249 * <p>
1250 * This subtracts the specified number of minutes from this time, returning a new time.
1251 * The calculation wraps around midnight.
1252 * <p>
1253 * This instance is immutable and unaffected by this method call.
1254 *
1255 * @param minutesToSubtract the minutes to subtract, may be negative
1256 * @return a {@code LocalTime} based on this time with the minutes subtracted, not null
1257 */
1258 public LocalTime minusMinutes(long minutesToSubtract) {
1259 return plusMinutes(-(minutesToSubtract % MINUTES_PER_DAY));
1260 }
1261
1262 /**
1263 * Returns a copy of this {@code LocalTime} with the specified number of seconds subtracted.
1264 * <p>
1265 * This subtracts the specified number of seconds from this time, returning a new time.
1266 * The calculation wraps around midnight.
1267 * <p>
1268 * This instance is immutable and unaffected by this method call.
1269 *
1270 * @param secondsToSubtract the seconds to subtract, may be negative
1271 * @return a {@code LocalTime} based on this time with the seconds subtracted, not null
1272 */
1273 public LocalTime minusSeconds(long secondsToSubtract) {
1274 return plusSeconds(-(secondsToSubtract % SECONDS_PER_DAY));
1275 }
1276
1277 /**
1278 * Returns a copy of this {@code LocalTime} with the specified number of nanoseconds subtracted.
1279 * <p>
1280 * This subtracts the specified number of nanoseconds from this time, returning a new time.
1281 * The calculation wraps around midnight.
1282 * <p>
1283 * This instance is immutable and unaffected by this method call.
1284 *
1285 * @param nanosToSubtract the nanos to subtract, may be negative
1286 * @return a {@code LocalTime} based on this time with the nanoseconds subtracted, not null
1287 */
1288 public LocalTime minusNanos(long nanosToSubtract) {
1289 return plusNanos(-(nanosToSubtract % NANOS_PER_DAY));
1290 }
1291
1292 //-----------------------------------------------------------------------
1293 /**
1294 * Queries this time using the specified query.
1295 * <p>
1296 * This queries this time using the specified query strategy object.
1297 * The {@code TemporalQuery} object defines the logic to be used to
1298 * obtain the result. Read the documentation of the query to understand
1299 * what the result of this method will be.
1300 * <p>
1301 * The result of this method is obtained by invoking the
1302 * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the
1303 * specified query passing {@code this} as the argument.
1304 *
1305 * @param <R> the type of the result
1306 * @param query the query to invoke, not null
1307 * @return the query result, null may be returned (defined by the query)
1308 * @throws DateTimeException if unable to query (defined by the query)
1309 * @throws ArithmeticException if numeric overflow occurs (defined by the query)
1310 */
1311 @SuppressWarnings("unchecked")
1312 @Override
1313 public <R> R query(TemporalQuery<R> query) {
1314 if (query == TemporalQueries.chronology() || query == TemporalQueries.zoneId() ||
1315 query == TemporalQueries.zone() || query == TemporalQueries.offset()) {
1316 return null;
1317 } else if (query == TemporalQueries.localTime()) {
1318 return (R) this;
1319 } else if (query == TemporalQueries.localDate()) {
1320 return null;
1321 } else if (query == TemporalQueries.precision()) {
1322 return (R) NANOS;
1323 }
1324 // inline TemporalAccessor.super.query(query) as an optimization
1325 // non-JDK classes are not permitted to make this optimization
1326 return query.queryFrom(this);
1327 }
1328
1329 /**
1330 * Adjusts the specified temporal object to have the same time as this object.
1331 * <p>
1332 * This returns a temporal object of the same observable type as the input
1333 * with the time changed to be the same as this.
1334 * <p>
1335 * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)}
1336 * passing {@link ChronoField#NANO_OF_DAY} as the field.
1337 * <p>
1338 * In most cases, it is clearer to reverse the calling pattern by using
1339 * {@link Temporal#with(TemporalAdjuster)}:
1340 * <pre>
1341 * // these two lines are equivalent, but the second approach is recommended
1342 * temporal = thisLocalTime.adjustInto(temporal);
1343 * temporal = temporal.with(thisLocalTime);
1344 * </pre>
1345 * <p>
1346 * This instance is immutable and unaffected by this method call.
1347 *
1348 * @param temporal the target object to be adjusted, not null
1349 * @return the adjusted object, not null
1350 * @throws DateTimeException if unable to make the adjustment
1351 * @throws ArithmeticException if numeric overflow occurs
1352 */
1353 @Override
1354 public Temporal adjustInto(Temporal temporal) {
1355 return temporal.with(NANO_OF_DAY, toNanoOfDay());
1356 }
1357
1358 /**
1359 * Calculates the amount of time until another time in terms of the specified unit.
1360 * <p>
1361 * This calculates the amount of time between two {@code LocalTime}
1362 * objects in terms of a single {@code TemporalUnit}.
1363 * The start and end points are {@code this} and the specified time.
1364 * The result will be negative if the end is before the start.
1365 * The {@code Temporal} passed to this method is converted to a
1366 * {@code LocalTime} using {@link #from(TemporalAccessor)}.
1367 * For example, the amount in hours between two times can be calculated
1368 * using {@code startTime.until(endTime, HOURS)}.
1369 * <p>
1370 * The calculation returns a whole number, representing the number of
1371 * complete units between the two times.
1372 * For example, the amount in hours between 11:30 and 13:29 will only
1373 * be one hour as it is one minute short of two hours.
1374 * <p>
1375 * There are two equivalent ways of using this method.
1376 * The first is to invoke this method.
1377 * The second is to use {@link TemporalUnit#between(Temporal, Temporal)}:
1378 * <pre>
1379 * // these two lines are equivalent
1380 * amount = start.until(end, MINUTES);
1381 * amount = MINUTES.between(start, end);
1382 * </pre>
1383 * The choice should be made based on which makes the code more readable.
1384 * <p>
1385 * The calculation is implemented in this method for {@link ChronoUnit}.
1386 * The units {@code NANOS}, {@code MICROS}, {@code MILLIS}, {@code SECONDS},
1387 * {@code MINUTES}, {@code HOURS} and {@code HALF_DAYS} are supported.
1388 * Other {@code ChronoUnit} values will throw an exception.
1389 * <p>
1390 * If the unit is not a {@code ChronoUnit}, then the result of this method
1391 * is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)}
1392 * passing {@code this} as the first argument and the converted input temporal
1393 * as the second argument.
1394 * <p>
1395 * This instance is immutable and unaffected by this method call.
1396 *
1397 * @param endExclusive the end time, exclusive, which is converted to a {@code LocalTime}, not null
1398 * @param unit the unit to measure the amount in, not null
1399 * @return the amount of time between this time and the end time
1400 * @throws DateTimeException if the amount cannot be calculated, or the end
1401 * temporal cannot be converted to a {@code LocalTime}
1402 * @throws UnsupportedTemporalTypeException if the unit is not supported
1403 * @throws ArithmeticException if numeric overflow occurs
1404 */
1405 @Override
1406 public long until(Temporal endExclusive, TemporalUnit unit) {
1407 LocalTime end = LocalTime.from(endExclusive);
1408 if (unit instanceof ChronoUnit) {
1409 long nanosUntil = end.toNanoOfDay() - toNanoOfDay(); // no overflow
1410 switch ((ChronoUnit) unit) {
1411 case NANOS: return nanosUntil;
1412 case MICROS: return nanosUntil / 1000;
1413 case MILLIS: return nanosUntil / 1000_000;
1414 case SECONDS: return nanosUntil / NANOS_PER_SECOND;
1415 case MINUTES: return nanosUntil / NANOS_PER_MINUTE;
1416 case HOURS: return nanosUntil / NANOS_PER_HOUR;
1417 case HALF_DAYS: return nanosUntil / (12 * NANOS_PER_HOUR);
1418 }
1419 throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
1420 }
1421 return unit.between(this, end);
1422 }
1423
1424 /**
1425 * Formats this time using the specified formatter.
1426 * <p>
1427 * This time will be passed to the formatter to produce a string.
1428 *
1429 * @param formatter the formatter to use, not null
1430 * @return the formatted time string, not null
1431 * @throws DateTimeException if an error occurs during printing
1432 */
1433 public String format(DateTimeFormatter formatter) {
1434 Objects.requireNonNull(formatter, "formatter");
1435 return formatter.format(this);
1436 }
1437
1438 //-----------------------------------------------------------------------
1439 /**
1440 * Combines this time with a date to create a {@code LocalDateTime}.
1441 * <p>
1442 * This returns a {@code LocalDateTime} formed from this time at the specified date.
1443 * All possible combinations of date and time are valid.
1444 *
1445 * @param date the date to combine with, not null
1446 * @return the local date-time formed from this time and the specified date, not null
1447 */
1448 public LocalDateTime atDate(LocalDate date) {
1449 return LocalDateTime.of(date, this);
1450 }
1451
1452 /**
1453 * Combines this time with an offset to create an {@code OffsetTime}.
1454 * <p>
1455 * This returns an {@code OffsetTime} formed from this time at the specified offset.
1456 * All possible combinations of time and offset are valid.
1457 *
1458 * @param offset the offset to combine with, not null
1459 * @return the offset time formed from this time and the specified offset, not null
1460 */
1461 public OffsetTime atOffset(ZoneOffset offset) {
1462 return OffsetTime.of(this, offset);
1463 }
1464
1465 //-----------------------------------------------------------------------
1466 /**
1467 * Extracts the time as seconds of day,
1468 * from {@code 0} to {@code 24 * 60 * 60 - 1}.
1469 *
1470 * @return the second-of-day equivalent to this time
1471 */
1472 public int toSecondOfDay() {
1473 int total = hour * SECONDS_PER_HOUR;
1474 total += minute * SECONDS_PER_MINUTE;
1475 total += second;
1476 return total;
1477 }
1478
1479 /**
1480 * Extracts the time as nanos of day,
1481 * from {@code 0} to {@code 24 * 60 * 60 * 1,000,000,000 - 1}.
1482 *
1483 * @return the nano of day equivalent to this time
1484 */
1485 public long toNanoOfDay() {
1486 long total = hour * NANOS_PER_HOUR;
1487 total += minute * NANOS_PER_MINUTE;
1488 total += second * NANOS_PER_SECOND;
1489 total += nano;
1490 return total;
1491 }
1492
1493 /**
1494 * Converts this {@code LocalTime} to the number of seconds since the epoch
1495 * of 1970-01-01T00:00:00Z.
1496 * <p>
1497 * This combines this local time with the specified date and
1498 * offset to calculate the epoch-second value, which is the
1499 * number of elapsed seconds from 1970-01-01T00:00:00Z.
1500 * Instants on the time-line after the epoch are positive, earlier
1501 * are negative.
1502 *
1503 * @param date the local date, not null
1504 * @param offset the zone offset, not null
1505 * @return the number of seconds since the epoch of 1970-01-01T00:00:00Z, may be negative
1506 * @since 9
1507 */
1508 public long toEpochSecond(LocalDate date, ZoneOffset offset) {
1509 Objects.requireNonNull(date, "date");
1510 Objects.requireNonNull(offset, "offset");
1511 long epochDay = date.toEpochDay();
1512 long secs = epochDay * 86400 + toSecondOfDay();
1513 secs -= offset.getTotalSeconds();
1514 return secs;
1515 }
1516
1517 //-----------------------------------------------------------------------
1518 /**
1519 * Compares this time to another time.
1520 * <p>
1521 * The comparison is based on the time-line position of the local times within a day.
1522 * It is "consistent with equals", as defined by {@link Comparable}.
1523 *
1524 * @param other the other time to compare to, not null
1525 * @return the comparator value, negative if less, positive if greater
1526 */
1527 @Override
1528 public int compareTo(LocalTime other) {
1529 int cmp = Integer.compare(hour, other.hour);
1530 if (cmp == 0) {
1531 cmp = Integer.compare(minute, other.minute);
1532 if (cmp == 0) {
1533 cmp = Integer.compare(second, other.second);
1534 if (cmp == 0) {
1535 cmp = Integer.compare(nano, other.nano);
1536 }
1537 }
1538 }
1539 return cmp;
1540 }
1541
1542 /**
1543 * Checks if this time is after the specified time.
1544 * <p>
1545 * The comparison is based on the time-line position of the time within a day.
1546 *
1547 * @param other the other time to compare to, not null
1548 * @return true if this is after the specified time
1549 */
1550 public boolean isAfter(LocalTime other) {
1551 return compareTo(other) > 0;
1552 }
1553
1554 /**
1555 * Checks if this time is before the specified time.
1556 * <p>
1557 * The comparison is based on the time-line position of the time within a day.
1558 *
1559 * @param other the other time to compare to, not null
1560 * @return true if this point is before the specified time
1561 */
1562 public boolean isBefore(LocalTime other) {
1563 return compareTo(other) < 0;
1564 }
1565
1566 //-----------------------------------------------------------------------
1567 /**
1568 * Checks if this time is equal to another time.
1569 * <p>
1570 * The comparison is based on the time-line position of the time within a day.
1571 * <p>
1572 * Only objects of type {@code LocalTime} are compared, other types return false.
1573 * To compare the date of two {@code TemporalAccessor} instances, use
1574 * {@link ChronoField#NANO_OF_DAY} as a comparator.
1575 *
1576 * @param obj the object to check, null returns false
1577 * @return true if this is equal to the other time
1578 */
1579 @Override
1580 public boolean equals(Object obj) {
1581 if (this == obj) {
1582 return true;
1583 }
1584 if (obj instanceof LocalTime) {
1585 LocalTime other = (LocalTime) obj;
1586 return hour == other.hour && minute == other.minute &&
1587 second == other.second && nano == other.nano;
1588 }
1589 return false;
1590 }
1591
1592 /**
1593 * A hash code for this time.
1594 *
1595 * @return a suitable hash code
1596 */
1597 @Override
1598 public int hashCode() {
1599 long nod = toNanoOfDay();
1600 return (int) (nod ^ (nod >>> 32));
1601 }
1602
1603 //-----------------------------------------------------------------------
1604 /**
1605 * Outputs this time as a {@code String}, such as {@code 10:15}.
1606 * <p>
1607 * The output will be one of the following ISO-8601 formats:
1608 * <ul>
1609 * <li>{@code HH:mm}</li>
1610 * <li>{@code HH:mm:ss}</li>
1611 * <li>{@code HH:mm:ss.SSS}</li>
1612 * <li>{@code HH:mm:ss.SSSSSS}</li>
1613 * <li>{@code HH:mm:ss.SSSSSSSSS}</li>
1614 * </ul>
1615 * The format used will be the shortest that outputs the full value of
1616 * the time where the omitted parts are implied to be zero.
1617 *
1618 * @return a string representation of this time, not null
1619 */
1620 @Override
1621 public String toString() {
1622 StringBuilder buf = new StringBuilder(18);
1623 int hourValue = hour;
1624 int minuteValue = minute;
1625 int secondValue = second;
1626 int nanoValue = nano;
1627 buf.append(hourValue < 10 ? "0" : "").append(hourValue)
1628 .append(minuteValue < 10 ? ":0" : ":").append(minuteValue);
1629 if (secondValue > 0 || nanoValue > 0) {
1630 buf.append(secondValue < 10 ? ":0" : ":").append(secondValue);
1631 if (nanoValue > 0) {
1632 buf.append('.');
1633 if (nanoValue % 1000_000 == 0) {
1634 buf.append(Integer.toString((nanoValue / 1000_000) + 1000).substring(1));
1635 } else if (nanoValue % 1000 == 0) {
1636 buf.append(Integer.toString((nanoValue / 1000) + 1000_000).substring(1));
1637 } else {
1638 buf.append(Integer.toString((nanoValue) + 1000_000_000).substring(1));
1639 }
1640 }
1641 }
1642 return buf.toString();
1643 }
1644
1645 //-----------------------------------------------------------------------
1646 /**
1647 * Writes the object using a
1648 * <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>.
1649 * @serialData
1650 * A twos-complement value indicates the remaining values are not in the stream
1651 * and should be set to zero.
1652 * <pre>
1653 * out.writeByte(4); // identifies a LocalTime
1654 * if (nano == 0) {
1655 * if (second == 0) {
1656 * if (minute == 0) {
1657 * out.writeByte(~hour);
1658 * } else {
1659 * out.writeByte(hour);
1660 * out.writeByte(~minute);
1661 * }
1662 * } else {
1663 * out.writeByte(hour);
1664 * out.writeByte(minute);
1665 * out.writeByte(~second);
1666 * }
1667 * } else {
1668 * out.writeByte(hour);
1669 * out.writeByte(minute);
1670 * out.writeByte(second);
1671 * out.writeInt(nano);
1672 * }
1673 * </pre>
1674 *
1675 * @return the instance of {@code Ser}, not null
1676 */
1677 private Object writeReplace() {
1678 return new Ser(Ser.LOCAL_TIME_TYPE, this);
1679 }
1680
1681 /**
1682 * Defend against malicious streams.
1683 *
1684 * @param s the stream to read
1685 * @throws InvalidObjectException always
1686 */
1687 private void readObject(ObjectInputStream s) throws InvalidObjectException {
1688 throw new InvalidObjectException("Deserialization via serialization delegate");
1689 }
1690
1691 void writeExternal(DataOutput out) throws IOException {
1692 if (nano == 0) {
1693 if (second == 0) {
1694 if (minute == 0) {
1695 out.writeByte(~hour);
1696 } else {
1697 out.writeByte(hour);
1698 out.writeByte(~minute);
1699 }
1700 } else {
1701 out.writeByte(hour);
1702 out.writeByte(minute);
1703 out.writeByte(~second);
1704 }
1705 } else {
1706 out.writeByte(hour);
1707 out.writeByte(minute);
1708 out.writeByte(second);
1709 out.writeInt(nano);
1710 }
1711 }
1712
1713 static LocalTime readExternal(DataInput in) throws IOException {
1714 int hour = in.readByte();
1715 int minute = 0;
1716 int second = 0;
1717 int nano = 0;
1718 if (hour < 0) {
1719 hour = ~hour;
1720 } else {
1721 minute = in.readByte();
1722 if (minute < 0) {
1723 minute = ~minute;
1724 } else {
1725 second = in.readByte();
1726 if (second < 0) {
1727 second = ~second;
1728 } else {
1729 nano = in.readInt();
1730 }
1731 }
1732 }
1733 return LocalTime.of(hour, minute, second, nano);
1734 }
1735
1736 }