1/* 2 * Copyright (c) 2012, 2015, 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 */ 62package java.time; 63 64import static java.time.temporal.ChronoField.HOUR_OF_DAY; 65import static java.time.temporal.ChronoField.MICRO_OF_DAY; 66import static java.time.temporal.ChronoField.MINUTE_OF_HOUR; 67import static java.time.temporal.ChronoField.NANO_OF_DAY; 68import static java.time.temporal.ChronoField.NANO_OF_SECOND; 69import static java.time.temporal.ChronoField.SECOND_OF_DAY; 70import static java.time.temporal.ChronoField.SECOND_OF_MINUTE; 71import static java.time.temporal.ChronoUnit.NANOS; 72 73import java.io.DataInput; 74import java.io.DataOutput; 75import java.io.IOException; 76import java.io.InvalidObjectException; 77import java.io.ObjectInputStream; 78import java.io.Serializable; 79import java.time.format.DateTimeFormatter; 80import java.time.format.DateTimeParseException; 81import java.time.temporal.ChronoField; 82import java.time.temporal.ChronoUnit; 83import java.time.temporal.Temporal; 84import java.time.temporal.TemporalAccessor; 85import java.time.temporal.TemporalAdjuster; 86import java.time.temporal.TemporalAmount; 87import java.time.temporal.TemporalField; 88import java.time.temporal.TemporalQueries; 89import java.time.temporal.TemporalQuery; 90import java.time.temporal.TemporalUnit; 91import java.time.temporal.UnsupportedTemporalTypeException; 92import java.time.temporal.ValueRange; 93import java.util.Objects; 94 95// Android-changed: removed ValueBased paragraph. 96/** 97 * A time without a time-zone in the ISO-8601 calendar system, 98 * such as {@code 10:15:30}. 99 * <p> 100 * {@code LocalTime} is an immutable date-time object that represents a time, 101 * often viewed as hour-minute-second. 102 * Time is represented to nanosecond precision. 103 * For example, the value "13:45.30.123456789" can be stored in a {@code LocalTime}. 104 * <p> 105 * This class does not store or represent a date or time-zone. 106 * Instead, it is a description of the local time as seen on a wall clock. 107 * It cannot represent an instant on the time-line without additional information 108 * such as an offset or time-zone. 109 * <p> 110 * The ISO-8601 calendar system is the modern civil calendar system used today 111 * in most of the world. This API assumes that all calendar systems use the same 112 * representation, this class, for time-of-day. 113 * 114 * @implSpec 115 * This class is immutable and thread-safe. 116 * 117 * @since 1.8 118 */ 119public final class LocalTime 120 implements Temporal, TemporalAdjuster, Comparable<LocalTime>, Serializable { 121 122 /** 123 * The minimum supported {@code LocalTime}, '00:00'. 124 * This is the time of midnight at the start of the day. 125 */ 126 public static final LocalTime MIN; 127 /** 128 * The maximum supported {@code LocalTime}, '23:59:59.999999999'. 129 * This is the time just before midnight at the end of the day. 130 */ 131 public static final LocalTime MAX; 132 /** 133 * The time of midnight at the start of the day, '00:00'. 134 */ 135 public static final LocalTime MIDNIGHT; 136 /** 137 * The time of noon in the middle of the day, '12:00'. 138 */ 139 public static final LocalTime NOON; 140 /** 141 * Constants for the local time of each hour. 142 */ 143 private static final LocalTime[] HOURS = new LocalTime[24]; 144 static { 145 for (int i = 0; i < HOURS.length; i++) { 146 HOURS[i] = new LocalTime(i, 0, 0, 0); 147 } 148 MIDNIGHT = HOURS[0]; 149 NOON = HOURS[12]; 150 MIN = HOURS[0]; 151 MAX = new LocalTime(23, 59, 59, 999_999_999); 152 } 153 154 /** 155 * Hours per day. 156 */ 157 static final int HOURS_PER_DAY = 24; 158 /** 159 * Minutes per hour. 160 */ 161 static final int MINUTES_PER_HOUR = 60; 162 /** 163 * Minutes per day. 164 */ 165 static final int MINUTES_PER_DAY = MINUTES_PER_HOUR * HOURS_PER_DAY; 166 /** 167 * Seconds per minute. 168 */ 169 static final int SECONDS_PER_MINUTE = 60; 170 /** 171 * Seconds per hour. 172 */ 173 static final int SECONDS_PER_HOUR = SECONDS_PER_MINUTE * MINUTES_PER_HOUR; 174 /** 175 * Seconds per day. 176 */ 177 static final int SECONDS_PER_DAY = SECONDS_PER_HOUR * HOURS_PER_DAY; 178 /** 179 * Milliseconds per day. 180 */ 181 static final long MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L; 182 /** 183 * Microseconds per day. 184 */ 185 static final long MICROS_PER_DAY = SECONDS_PER_DAY * 1000_000L; 186 /** 187 * Nanos per second. 188 */ 189 static final long NANOS_PER_SECOND = 1000_000_000L; 190 /** 191 * Nanos per minute. 192 */ 193 static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * SECONDS_PER_MINUTE; 194 /** 195 * Nanos per hour. 196 */ 197 static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * MINUTES_PER_HOUR; 198 /** 199 * Nanos per day. 200 */ 201 static final long NANOS_PER_DAY = NANOS_PER_HOUR * HOURS_PER_DAY; 202 203 /** 204 * Serialization version. 205 */ 206 private static final long serialVersionUID = 6414437269572265201L; 207 208 /** 209 * The hour. 210 */ 211 private final byte hour; 212 /** 213 * The minute. 214 */ 215 private final byte minute; 216 /** 217 * The second. 218 */ 219 private final byte second; 220 /** 221 * The nanosecond. 222 */ 223 private final int nano; 224 225 //----------------------------------------------------------------------- 226 /** 227 * Obtains the current time from the system clock in the default time-zone. 228 * <p> 229 * This will query the {@link Clock#systemDefaultZone() system clock} in the default 230 * time-zone to obtain the current time. 231 * <p> 232 * Using this method will prevent the ability to use an alternate clock for testing 233 * because the clock is hard-coded. 234 * 235 * @return the current time using the system clock and default time-zone, not null 236 */ 237 public static LocalTime now() { 238 return now(Clock.systemDefaultZone()); 239 } 240 241 /** 242 * Obtains the current time from the system clock in the specified time-zone. 243 * <p> 244 * This will query the {@link Clock#system(ZoneId) system clock} to obtain the current time. 245 * Specifying the time-zone avoids dependence on the default time-zone. 246 * <p> 247 * Using this method will prevent the ability to use an alternate clock for testing 248 * because the clock is hard-coded. 249 * 250 * @param zone the zone ID to use, not null 251 * @return the current time using the system clock, not null 252 */ 253 public static LocalTime now(ZoneId zone) { 254 return now(Clock.system(zone)); 255 } 256 257 /** 258 * Obtains the current time from the specified clock. 259 * <p> 260 * This will query the specified clock to obtain the current time. 261 * Using this method allows the use of an alternate clock for testing. 262 * The alternate clock may be introduced using {@link Clock dependency injection}. 263 * 264 * @param clock the clock to use, not null 265 * @return the current time, not null 266 */ 267 public static LocalTime now(Clock clock) { 268 Objects.requireNonNull(clock, "clock"); 269 // inline OffsetTime factory to avoid creating object and InstantProvider checks 270 final Instant now = clock.instant(); // called once 271 ZoneOffset offset = clock.getZone().getRules().getOffset(now); 272 long localSecond = now.getEpochSecond() + offset.getTotalSeconds(); // overflow caught later 273 int secsOfDay = (int) Math.floorMod(localSecond, SECONDS_PER_DAY); 274 return ofNanoOfDay(secsOfDay * NANOS_PER_SECOND + now.getNano()); 275 } 276 277 //----------------------------------------------------------------------- 278 /** 279 * Obtains an instance of {@code LocalTime} from an hour and minute. 280 * <p> 281 * This returns a {@code LocalTime} with the specified hour and minute. 282 * The second and nanosecond fields will be set to zero. 283 * 284 * @param hour the hour-of-day to represent, from 0 to 23 285 * @param minute the minute-of-hour to represent, from 0 to 59 286 * @return the local time, not null 287 * @throws DateTimeException if the value of any field is out of range 288 */ 289 public static LocalTime of(int hour, int minute) { 290 HOUR_OF_DAY.checkValidValue(hour); 291 if (minute == 0) { 292 return HOURS[hour]; // for performance 293 } 294 MINUTE_OF_HOUR.checkValidValue(minute); 295 return new LocalTime(hour, minute, 0, 0); 296 } 297 298 /** 299 * Obtains an instance of {@code LocalTime} from an hour, minute and second. 300 * <p> 301 * This returns a {@code LocalTime} with the specified hour, minute and second. 302 * The nanosecond field will be set to zero. 303 * 304 * @param hour the hour-of-day to represent, from 0 to 23 305 * @param minute the minute-of-hour to represent, from 0 to 59 306 * @param second the second-of-minute to represent, from 0 to 59 307 * @return the local time, not null 308 * @throws DateTimeException if the value of any field is out of range 309 */ 310 public static LocalTime of(int hour, int minute, int second) { 311 HOUR_OF_DAY.checkValidValue(hour); 312 if ((minute | second) == 0) { 313 return HOURS[hour]; // for performance 314 } 315 MINUTE_OF_HOUR.checkValidValue(minute); 316 SECOND_OF_MINUTE.checkValidValue(second); 317 return new LocalTime(hour, minute, second, 0); 318 } 319 320 /** 321 * Obtains an instance of {@code LocalTime} from an hour, minute, second and nanosecond. 322 * <p> 323 * This returns a {@code LocalTime} with the specified hour, minute, second and nanosecond. 324 * 325 * @param hour the hour-of-day to represent, from 0 to 23 326 * @param minute the minute-of-hour to represent, from 0 to 59 327 * @param second the second-of-minute to represent, from 0 to 59 328 * @param nanoOfSecond the nano-of-second to represent, from 0 to 999,999,999 329 * @return the local time, not null 330 * @throws DateTimeException if the value of any field is out of range 331 */ 332 public static LocalTime of(int hour, int minute, int second, int nanoOfSecond) { 333 HOUR_OF_DAY.checkValidValue(hour); 334 MINUTE_OF_HOUR.checkValidValue(minute); 335 SECOND_OF_MINUTE.checkValidValue(second); 336 NANO_OF_SECOND.checkValidValue(nanoOfSecond); 337 return create(hour, minute, second, nanoOfSecond); 338 } 339 340 //----------------------------------------------------------------------- 341 /** 342 * Obtains an instance of {@code LocalTime} from a second-of-day value. 343 * <p> 344 * This returns a {@code LocalTime} with the specified second-of-day. 345 * The nanosecond field will be set to zero. 346 * 347 * @param secondOfDay the second-of-day, from {@code 0} to {@code 24 * 60 * 60 - 1} 348 * @return the local time, not null 349 * @throws DateTimeException if the second-of-day value is invalid 350 */ 351 public static LocalTime ofSecondOfDay(long secondOfDay) { 352 SECOND_OF_DAY.checkValidValue(secondOfDay); 353 int hours = (int) (secondOfDay / SECONDS_PER_HOUR); 354 secondOfDay -= hours * SECONDS_PER_HOUR; 355 int minutes = (int) (secondOfDay / SECONDS_PER_MINUTE); 356 secondOfDay -= minutes * SECONDS_PER_MINUTE; 357 return create(hours, minutes, (int) secondOfDay, 0); 358 } 359 360 /** 361 * Obtains an instance of {@code LocalTime} from a nanos-of-day value. 362 * <p> 363 * This returns a {@code LocalTime} with the specified nanosecond-of-day. 364 * 365 * @param nanoOfDay the nano of day, from {@code 0} to {@code 24 * 60 * 60 * 1,000,000,000 - 1} 366 * @return the local time, not null 367 * @throws DateTimeException if the nanos of day value is invalid 368 */ 369 public static LocalTime ofNanoOfDay(long nanoOfDay) { 370 NANO_OF_DAY.checkValidValue(nanoOfDay); 371 int hours = (int) (nanoOfDay / NANOS_PER_HOUR); 372 nanoOfDay -= hours * NANOS_PER_HOUR; 373 int minutes = (int) (nanoOfDay / NANOS_PER_MINUTE); 374 nanoOfDay -= minutes * NANOS_PER_MINUTE; 375 int seconds = (int) (nanoOfDay / NANOS_PER_SECOND); 376 nanoOfDay -= seconds * NANOS_PER_SECOND; 377 return create(hours, minutes, seconds, (int) nanoOfDay); 378 } 379 380 //----------------------------------------------------------------------- 381 /** 382 * Obtains an instance of {@code LocalTime} from a temporal object. 383 * <p> 384 * This obtains a local time based on the specified temporal. 385 * A {@code TemporalAccessor} represents an arbitrary set of date and time information, 386 * which this factory converts to an instance of {@code LocalTime}. 387 * <p> 388 * The conversion uses the {@link TemporalQueries#localTime()} query, which relies 389 * on extracting the {@link ChronoField#NANO_OF_DAY NANO_OF_DAY} field. 390 * <p> 391 * This method matches the signature of the functional interface {@link TemporalQuery} 392 * allowing it to be used as a query via method reference, {@code LocalTime::from}. 393 * 394 * @param temporal the temporal object to convert, not null 395 * @return the local time, not null 396 * @throws DateTimeException if unable to convert to a {@code LocalTime} 397 */ 398 public static LocalTime from(TemporalAccessor temporal) { 399 Objects.requireNonNull(temporal, "temporal"); 400 LocalTime time = temporal.query(TemporalQueries.localTime()); 401 if (time == null) { 402 throw new DateTimeException("Unable to obtain LocalTime from TemporalAccessor: " + 403 temporal + " of type " + temporal.getClass().getName()); 404 } 405 return time; 406 } 407 408 //----------------------------------------------------------------------- 409 /** 410 * Obtains an instance of {@code LocalTime} from a text string such as {@code 10:15}. 411 * <p> 412 * The string must represent a valid time and is parsed using 413 * {@link java.time.format.DateTimeFormatter#ISO_LOCAL_TIME}. 414 * 415 * @param text the text to parse such as "10:15:30", not null 416 * @return the parsed local time, not null 417 * @throws DateTimeParseException if the text cannot be parsed 418 */ 419 public static LocalTime parse(CharSequence text) { 420 return parse(text, DateTimeFormatter.ISO_LOCAL_TIME); 421 } 422 423 /** 424 * Obtains an instance of {@code LocalTime} from a text string using a specific formatter. 425 * <p> 426 * The text is parsed using the formatter, returning a time. 427 * 428 * @param text the text to parse, not null 429 * @param formatter the formatter to use, not null 430 * @return the parsed local time, not null 431 * @throws DateTimeParseException if the text cannot be parsed 432 */ 433 public static LocalTime parse(CharSequence text, DateTimeFormatter formatter) { 434 Objects.requireNonNull(formatter, "formatter"); 435 return formatter.parse(text, LocalTime::from); 436 } 437 438 //----------------------------------------------------------------------- 439 /** 440 * Creates a local time from the hour, minute, second and nanosecond fields. 441 * <p> 442 * This factory may return a cached value, but applications must not rely on this. 443 * 444 * @param hour the hour-of-day to represent, validated from 0 to 23 445 * @param minute the minute-of-hour to represent, validated from 0 to 59 446 * @param second the second-of-minute to represent, validated from 0 to 59 447 * @param nanoOfSecond the nano-of-second to represent, validated from 0 to 999,999,999 448 * @return the local time, not null 449 */ 450 private static LocalTime create(int hour, int minute, int second, int nanoOfSecond) { 451 if ((minute | second | nanoOfSecond) == 0) { 452 return HOURS[hour]; 453 } 454 return new LocalTime(hour, minute, second, nanoOfSecond); 455 } 456 457 /** 458 * Constructor, previously validated. 459 * 460 * @param hour the hour-of-day to represent, validated from 0 to 23 461 * @param minute the minute-of-hour to represent, validated from 0 to 59 462 * @param second the second-of-minute to represent, validated from 0 to 59 463 * @param nanoOfSecond the nano-of-second to represent, validated from 0 to 999,999,999 464 */ 465 private LocalTime(int hour, int minute, int second, int nanoOfSecond) { 466 this.hour = (byte) hour; 467 this.minute = (byte) minute; 468 this.second = (byte) second; 469 this.nano = nanoOfSecond; 470 } 471 472 //----------------------------------------------------------------------- 473 /** 474 * Checks if the specified field is supported. 475 * <p> 476 * This checks if this time can be queried for the specified field. 477 * If false, then calling the {@link #range(TemporalField) range}, 478 * {@link #get(TemporalField) get} and {@link #with(TemporalField, long)} 479 * methods will throw an exception. 480 * <p> 481 * If the field is a {@link ChronoField} then the query is implemented here. 482 * The supported fields are: 483 * <ul> 484 * <li>{@code NANO_OF_SECOND} 485 * <li>{@code NANO_OF_DAY} 486 * <li>{@code MICRO_OF_SECOND} 487 * <li>{@code MICRO_OF_DAY} 488 * <li>{@code MILLI_OF_SECOND} 489 * <li>{@code MILLI_OF_DAY} 490 * <li>{@code SECOND_OF_MINUTE} 491 * <li>{@code SECOND_OF_DAY} 492 * <li>{@code MINUTE_OF_HOUR} 493 * <li>{@code MINUTE_OF_DAY} 494 * <li>{@code HOUR_OF_AMPM} 495 * <li>{@code CLOCK_HOUR_OF_AMPM} 496 * <li>{@code HOUR_OF_DAY} 497 * <li>{@code CLOCK_HOUR_OF_DAY} 498 * <li>{@code AMPM_OF_DAY} 499 * </ul> 500 * All other {@code ChronoField} instances will return false. 501 * <p> 502 * If the field is not a {@code ChronoField}, then the result of this method 503 * is obtained by invoking {@code TemporalField.isSupportedBy(TemporalAccessor)} 504 * passing {@code this} as the argument. 505 * Whether the field is supported is determined by the field. 506 * 507 * @param field the field to check, null returns false 508 * @return true if the field is supported on this time, false if not 509 */ 510 @Override 511 public boolean isSupported(TemporalField field) { 512 if (field instanceof ChronoField) { 513 return field.isTimeBased(); 514 } 515 return field != null && field.isSupportedBy(this); 516 } 517 518 /** 519 * Checks if the specified unit is supported. 520 * <p> 521 * This checks if the specified unit can be added to, or subtracted from, this time. 522 * If false, then calling the {@link #plus(long, TemporalUnit)} and 523 * {@link #minus(long, TemporalUnit) minus} methods will throw an exception. 524 * <p> 525 * If the unit is a {@link ChronoUnit} then the query is implemented here. 526 * The supported units are: 527 * <ul> 528 * <li>{@code NANOS} 529 * <li>{@code MICROS} 530 * <li>{@code MILLIS} 531 * <li>{@code SECONDS} 532 * <li>{@code MINUTES} 533 * <li>{@code HOURS} 534 * <li>{@code HALF_DAYS} 535 * </ul> 536 * All other {@code ChronoUnit} instances will return false. 537 * <p> 538 * If the unit is not a {@code ChronoUnit}, then the result of this method 539 * is obtained by invoking {@code TemporalUnit.isSupportedBy(Temporal)} 540 * passing {@code this} as the argument. 541 * Whether the unit is supported is determined by the unit. 542 * 543 * @param unit the unit to check, null returns false 544 * @return true if the unit can be added/subtracted, false if not 545 */ 546 @Override // override for Javadoc 547 public boolean isSupported(TemporalUnit unit) { 548 if (unit instanceof ChronoUnit) { 549 return unit.isTimeBased(); 550 } 551 return unit != null && unit.isSupportedBy(this); 552 } 553 554 //----------------------------------------------------------------------- 555 /** 556 * Gets the range of valid values for the specified field. 557 * <p> 558 * The range object expresses the minimum and maximum valid values for a field. 559 * This time is used to enhance the accuracy of the returned range. 560 * If it is not possible to return the range, because the field is not supported 561 * or for some other reason, an exception is thrown. 562 * <p> 563 * If the field is a {@link ChronoField} then the query is implemented here. 564 * The {@link #isSupported(TemporalField) supported fields} will return 565 * appropriate range instances. 566 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 567 * <p> 568 * If the field is not a {@code ChronoField}, then the result of this method 569 * is obtained by invoking {@code TemporalField.rangeRefinedBy(TemporalAccessor)} 570 * passing {@code this} as the argument. 571 * Whether the range can be obtained is determined by the field. 572 * 573 * @param field the field to query the range for, not null 574 * @return the range of valid values for the field, not null 575 * @throws DateTimeException if the range for the field cannot be obtained 576 * @throws UnsupportedTemporalTypeException if the field is not supported 577 */ 578 @Override // override for Javadoc 579 public ValueRange range(TemporalField field) { 580 return Temporal.super.range(field); 581 } 582 583 /** 584 * Gets the value of the specified field from this time as an {@code int}. 585 * <p> 586 * This queries this time for the value of the specified field. 587 * The returned value will always be within the valid range of values for the field. 588 * If it is not possible to return the value, 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 valid 593 * values based on this time, except {@code NANO_OF_DAY} and {@code MICRO_OF_DAY} 594 * which are too large to fit in an {@code int} and throw a {@code DateTimeException}. 595 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 596 * <p> 597 * If the field is not a {@code ChronoField}, then the result of this method 598 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} 599 * passing {@code this} as the argument. Whether the value can be obtained, 600 * and what the value represents, is determined by the field. 601 * 602 * @param field the field to get, not null 603 * @return the value for the field 604 * @throws DateTimeException if a value for the field cannot be obtained or 605 * the value is outside the range of valid values for the field 606 * @throws UnsupportedTemporalTypeException if the field is not supported or 607 * the range of values exceeds an {@code int} 608 * @throws ArithmeticException if numeric overflow occurs 609 */ 610 @Override // override for Javadoc and performance 611 public int get(TemporalField field) { 612 if (field instanceof ChronoField) { 613 return get0(field); 614 } 615 return Temporal.super.get(field); 616 } 617 618 /** 619 * Gets the value of the specified field from this time as a {@code long}. 620 * <p> 621 * This queries this time for the value of the specified field. 622 * If it is not possible to return the value, because the field is not supported 623 * or for some other reason, an exception is thrown. 624 * <p> 625 * If the field is a {@link ChronoField} then the query is implemented here. 626 * The {@link #isSupported(TemporalField) supported fields} will return valid 627 * values based on this time. 628 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 629 * <p> 630 * If the field is not a {@code ChronoField}, then the result of this method 631 * is obtained by invoking {@code TemporalField.getFrom(TemporalAccessor)} 632 * passing {@code this} as the argument. Whether the value can be obtained, 633 * and what the value represents, is determined by the field. 634 * 635 * @param field the field to get, not null 636 * @return the value for the field 637 * @throws DateTimeException if a value for the field cannot be obtained 638 * @throws UnsupportedTemporalTypeException if the field is not supported 639 * @throws ArithmeticException if numeric overflow occurs 640 */ 641 @Override 642 public long getLong(TemporalField field) { 643 if (field instanceof ChronoField) { 644 if (field == NANO_OF_DAY) { 645 return toNanoOfDay(); 646 } 647 if (field == MICRO_OF_DAY) { 648 return toNanoOfDay() / 1000; 649 } 650 return get0(field); 651 } 652 return field.getFrom(this); 653 } 654 655 private int get0(TemporalField field) { 656 switch ((ChronoField) field) { 657 case NANO_OF_SECOND: return nano; 658 case NANO_OF_DAY: throw new UnsupportedTemporalTypeException("Invalid field 'NanoOfDay' for get() method, use getLong() instead"); 659 case MICRO_OF_SECOND: return nano / 1000; 660 case MICRO_OF_DAY: throw new UnsupportedTemporalTypeException("Invalid field 'MicroOfDay' for get() method, use getLong() instead"); 661 case MILLI_OF_SECOND: return nano / 1000_000; 662 case MILLI_OF_DAY: return (int) (toNanoOfDay() / 1000_000); 663 case SECOND_OF_MINUTE: return second; 664 case SECOND_OF_DAY: return toSecondOfDay(); 665 case MINUTE_OF_HOUR: return minute; 666 case MINUTE_OF_DAY: return hour * 60 + minute; 667 case HOUR_OF_AMPM: return hour % 12; 668 case CLOCK_HOUR_OF_AMPM: int ham = hour % 12; return (ham % 12 == 0 ? 12 : ham); 669 case HOUR_OF_DAY: return hour; 670 case CLOCK_HOUR_OF_DAY: return (hour == 0 ? 24 : hour); 671 case AMPM_OF_DAY: return hour / 12; 672 } 673 throw new UnsupportedTemporalTypeException("Unsupported field: " + field); 674 } 675 676 //----------------------------------------------------------------------- 677 /** 678 * Gets the hour-of-day field. 679 * 680 * @return the hour-of-day, from 0 to 23 681 */ 682 public int getHour() { 683 return hour; 684 } 685 686 /** 687 * Gets the minute-of-hour field. 688 * 689 * @return the minute-of-hour, from 0 to 59 690 */ 691 public int getMinute() { 692 return minute; 693 } 694 695 /** 696 * Gets the second-of-minute field. 697 * 698 * @return the second-of-minute, from 0 to 59 699 */ 700 public int getSecond() { 701 return second; 702 } 703 704 /** 705 * Gets the nano-of-second field. 706 * 707 * @return the nano-of-second, from 0 to 999,999,999 708 */ 709 public int getNano() { 710 return nano; 711 } 712 713 //----------------------------------------------------------------------- 714 /** 715 * Returns an adjusted copy of this time. 716 * <p> 717 * This returns a {@code LocalTime}, based on this one, with the time adjusted. 718 * The adjustment takes place using the specified adjuster strategy object. 719 * Read the documentation of the adjuster to understand what adjustment will be made. 720 * <p> 721 * A simple adjuster might simply set the one of the fields, such as the hour field. 722 * A more complex adjuster might set the time to the last hour of the day. 723 * <p> 724 * The result of this method is obtained by invoking the 725 * {@link TemporalAdjuster#adjustInto(Temporal)} method on the 726 * specified adjuster passing {@code this} as the argument. 727 * <p> 728 * This instance is immutable and unaffected by this method call. 729 * 730 * @param adjuster the adjuster to use, not null 731 * @return a {@code LocalTime} based on {@code this} with the adjustment made, not null 732 * @throws DateTimeException if the adjustment cannot be made 733 * @throws ArithmeticException if numeric overflow occurs 734 */ 735 @Override 736 public LocalTime with(TemporalAdjuster adjuster) { 737 // optimizations 738 if (adjuster instanceof LocalTime) { 739 return (LocalTime) adjuster; 740 } 741 return (LocalTime) adjuster.adjustInto(this); 742 } 743 744 /** 745 * Returns a copy of this time with the specified field set to a new value. 746 * <p> 747 * This returns a {@code LocalTime}, based on this one, with the value 748 * for the specified field changed. 749 * This can be used to change any supported field, such as the hour, minute or second. 750 * If it is not possible to set the value, because the field is not supported or for 751 * some other reason, an exception is thrown. 752 * <p> 753 * If the field is a {@link ChronoField} then the adjustment is implemented here. 754 * The supported fields behave as follows: 755 * <ul> 756 * <li>{@code NANO_OF_SECOND} - 757 * Returns a {@code LocalTime} with the specified nano-of-second. 758 * The hour, minute and second will be unchanged. 759 * <li>{@code NANO_OF_DAY} - 760 * Returns a {@code LocalTime} with the specified nano-of-day. 761 * This completely replaces the time and is equivalent to {@link #ofNanoOfDay(long)}. 762 * <li>{@code MICRO_OF_SECOND} - 763 * Returns a {@code LocalTime} with the nano-of-second replaced by the specified 764 * micro-of-second multiplied by 1,000. 765 * The hour, minute and second will be unchanged. 766 * <li>{@code MICRO_OF_DAY} - 767 * Returns a {@code LocalTime} with the specified micro-of-day. 768 * This completely replaces the time and is equivalent to using {@link #ofNanoOfDay(long)} 769 * with the micro-of-day multiplied by 1,000. 770 * <li>{@code MILLI_OF_SECOND} - 771 * Returns a {@code LocalTime} with the nano-of-second replaced by the specified 772 * milli-of-second multiplied by 1,000,000. 773 * The hour, minute and second will be unchanged. 774 * <li>{@code MILLI_OF_DAY} - 775 * Returns a {@code LocalTime} with the specified milli-of-day. 776 * This completely replaces the time and is equivalent to using {@link #ofNanoOfDay(long)} 777 * with the milli-of-day multiplied by 1,000,000. 778 * <li>{@code SECOND_OF_MINUTE} - 779 * Returns a {@code LocalTime} with the specified second-of-minute. 780 * The hour, minute and nano-of-second will be unchanged. 781 * <li>{@code SECOND_OF_DAY} - 782 * Returns a {@code LocalTime} with the specified second-of-day. 783 * The nano-of-second will be unchanged. 784 * <li>{@code MINUTE_OF_HOUR} - 785 * Returns a {@code LocalTime} with the specified minute-of-hour. 786 * The hour, second-of-minute and nano-of-second will be unchanged. 787 * <li>{@code MINUTE_OF_DAY} - 788 * Returns a {@code LocalTime} with the specified minute-of-day. 789 * The second-of-minute and nano-of-second will be unchanged. 790 * <li>{@code HOUR_OF_AMPM} - 791 * Returns a {@code LocalTime} with the specified hour-of-am-pm. 792 * The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged. 793 * <li>{@code CLOCK_HOUR_OF_AMPM} - 794 * Returns a {@code LocalTime} with the specified clock-hour-of-am-pm. 795 * The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged. 796 * <li>{@code HOUR_OF_DAY} - 797 * Returns a {@code LocalTime} with the specified hour-of-day. 798 * The minute-of-hour, second-of-minute and nano-of-second will be unchanged. 799 * <li>{@code CLOCK_HOUR_OF_DAY} - 800 * Returns a {@code LocalTime} with the specified clock-hour-of-day. 801 * The minute-of-hour, second-of-minute and nano-of-second will be unchanged. 802 * <li>{@code AMPM_OF_DAY} - 803 * Returns a {@code LocalTime} with the specified AM/PM. 804 * The hour-of-am-pm, minute-of-hour, second-of-minute and nano-of-second will be unchanged. 805 * </ul> 806 * <p> 807 * In all cases, if the new value is outside the valid range of values for the field 808 * then a {@code DateTimeException} will be thrown. 809 * <p> 810 * All other {@code ChronoField} instances will throw an {@code UnsupportedTemporalTypeException}. 811 * <p> 812 * If the field is not a {@code ChronoField}, then the result of this method 813 * is obtained by invoking {@code TemporalField.adjustInto(Temporal, long)} 814 * passing {@code this} as the argument. In this case, the field determines 815 * whether and how to adjust the instant. 816 * <p> 817 * This instance is immutable and unaffected by this method call. 818 * 819 * @param field the field to set in the result, not null 820 * @param newValue the new value of the field in the result 821 * @return a {@code LocalTime} based on {@code this} with the specified field set, not null 822 * @throws DateTimeException if the field cannot be set 823 * @throws UnsupportedTemporalTypeException if the field is not supported 824 * @throws ArithmeticException if numeric overflow occurs 825 */ 826 @Override 827 public LocalTime with(TemporalField field, long newValue) { 828 if (field instanceof ChronoField) { 829 ChronoField f = (ChronoField) field; 830 f.checkValidValue(newValue); 831 switch (f) { 832 case NANO_OF_SECOND: return withNano((int) newValue); 833 case NANO_OF_DAY: return LocalTime.ofNanoOfDay(newValue); 834 case MICRO_OF_SECOND: return withNano((int) newValue * 1000); 835 case MICRO_OF_DAY: return LocalTime.ofNanoOfDay(newValue * 1000); 836 case MILLI_OF_SECOND: return withNano((int) newValue * 1000_000); 837 case MILLI_OF_DAY: return LocalTime.ofNanoOfDay(newValue * 1000_000); 838 case SECOND_OF_MINUTE: return withSecond((int) newValue); 839 case SECOND_OF_DAY: return plusSeconds(newValue - toSecondOfDay()); 840 case MINUTE_OF_HOUR: return withMinute((int) newValue); 841 case MINUTE_OF_DAY: return plusMinutes(newValue - (hour * 60 + minute)); 842 case HOUR_OF_AMPM: return plusHours(newValue - (hour % 12)); 843 case CLOCK_HOUR_OF_AMPM: return plusHours((newValue == 12 ? 0 : newValue) - (hour % 12)); 844 case HOUR_OF_DAY: return withHour((int) newValue); 845 case CLOCK_HOUR_OF_DAY: return withHour((int) (newValue == 24 ? 0 : newValue)); 846 case AMPM_OF_DAY: return plusHours((newValue - (hour / 12)) * 12); 847 } 848 throw new UnsupportedTemporalTypeException("Unsupported field: " + field); 849 } 850 return field.adjustInto(this, newValue); 851 } 852 853 //----------------------------------------------------------------------- 854 /** 855 * Returns a copy of this {@code LocalTime} with the hour-of-day altered. 856 * <p> 857 * This instance is immutable and unaffected by this method call. 858 * 859 * @param hour the hour-of-day to set in the result, from 0 to 23 860 * @return a {@code LocalTime} based on this time with the requested hour, not null 861 * @throws DateTimeException if the hour value is invalid 862 */ 863 public LocalTime withHour(int hour) { 864 if (this.hour == hour) { 865 return this; 866 } 867 HOUR_OF_DAY.checkValidValue(hour); 868 return create(hour, minute, second, nano); 869 } 870 871 /** 872 * Returns a copy of this {@code LocalTime} with the minute-of-hour altered. 873 * <p> 874 * This instance is immutable and unaffected by this method call. 875 * 876 * @param minute the minute-of-hour to set in the result, from 0 to 59 877 * @return a {@code LocalTime} based on this time with the requested minute, not null 878 * @throws DateTimeException if the minute value is invalid 879 */ 880 public LocalTime withMinute(int minute) { 881 if (this.minute == minute) { 882 return this; 883 } 884 MINUTE_OF_HOUR.checkValidValue(minute); 885 return create(hour, minute, second, nano); 886 } 887 888 /** 889 * Returns a copy of this {@code LocalTime} with the second-of-minute altered. 890 * <p> 891 * This instance is immutable and unaffected by this method call. 892 * 893 * @param second the second-of-minute to set in the result, from 0 to 59 894 * @return a {@code LocalTime} based on this time with the requested second, not null 895 * @throws DateTimeException if the second value is invalid 896 */ 897 public LocalTime withSecond(int second) { 898 if (this.second == second) { 899 return this; 900 } 901 SECOND_OF_MINUTE.checkValidValue(second); 902 return create(hour, minute, second, nano); 903 } 904 905 /** 906 * Returns a copy of this {@code LocalTime} with the nano-of-second altered. 907 * <p> 908 * This instance is immutable and unaffected by this method call. 909 * 910 * @param nanoOfSecond the nano-of-second to set in the result, from 0 to 999,999,999 911 * @return a {@code LocalTime} based on this time with the requested nanosecond, not null 912 * @throws DateTimeException if the nanos value is invalid 913 */ 914 public LocalTime withNano(int nanoOfSecond) { 915 if (this.nano == nanoOfSecond) { 916 return this; 917 } 918 NANO_OF_SECOND.checkValidValue(nanoOfSecond); 919 return create(hour, minute, second, nanoOfSecond); 920 } 921 922 //----------------------------------------------------------------------- 923 /** 924 * Returns a copy of this {@code LocalTime} with the time truncated. 925 * <p> 926 * Truncation returns a copy of the original time with fields 927 * smaller than the specified unit set to zero. 928 * For example, truncating with the {@link ChronoUnit#MINUTES minutes} unit 929 * will set the second-of-minute and nano-of-second field to zero. 930 * <p> 931 * The unit must have a {@linkplain TemporalUnit#getDuration() duration} 932 * that divides into the length of a standard day without remainder. 933 * This includes all supplied time units on {@link ChronoUnit} and 934 * {@link ChronoUnit#DAYS DAYS}. Other units throw an exception. 935 * <p> 936 * This instance is immutable and unaffected by this method call. 937 * 938 * @param unit the unit to truncate to, not null 939 * @return a {@code LocalTime} based on this time with the time truncated, not null 940 * @throws DateTimeException if unable to truncate 941 * @throws UnsupportedTemporalTypeException if the unit is not supported 942 */ 943 public LocalTime truncatedTo(TemporalUnit unit) { 944 if (unit == ChronoUnit.NANOS) { 945 return this; 946 } 947 Duration unitDur = unit.getDuration(); 948 if (unitDur.getSeconds() > SECONDS_PER_DAY) { 949 throw new UnsupportedTemporalTypeException("Unit is too large to be used for truncation"); 950 } 951 long dur = unitDur.toNanos(); 952 if ((NANOS_PER_DAY % dur) != 0) { 953 throw new UnsupportedTemporalTypeException("Unit must divide into a standard day without remainder"); 954 } 955 long nod = toNanoOfDay(); 956 return ofNanoOfDay((nod / dur) * dur); 957 } 958 959 //----------------------------------------------------------------------- 960 /** 961 * Returns a copy of this time with the specified amount added. 962 * <p> 963 * This returns a {@code LocalTime}, based on this one, with the specified amount added. 964 * The amount is typically {@link Duration} but may be any other type implementing 965 * the {@link TemporalAmount} interface. 966 * <p> 967 * The calculation is delegated to the amount object by calling 968 * {@link TemporalAmount#addTo(Temporal)}. The amount implementation is free 969 * to implement the addition in any way it wishes, however it typically 970 * calls back to {@link #plus(long, TemporalUnit)}. Consult the documentation 971 * of the amount implementation to determine if it can be successfully added. 972 * <p> 973 * This instance is immutable and unaffected by this method call. 974 * 975 * @param amountToAdd the amount to add, not null 976 * @return a {@code LocalTime} based on this time with the addition made, not null 977 * @throws DateTimeException if the addition cannot be made 978 * @throws ArithmeticException if numeric overflow occurs 979 */ 980 @Override 981 public LocalTime plus(TemporalAmount amountToAdd) { 982 return (LocalTime) amountToAdd.addTo(this); 983 } 984 985 /** 986 * Returns a copy of this time with the specified amount added. 987 * <p> 988 * This returns a {@code LocalTime}, based on this one, with the amount 989 * in terms of the unit added. If it is not possible to add the amount, because the 990 * unit is not supported or for some other reason, an exception is thrown. 991 * <p> 992 * If the field is a {@link ChronoUnit} then the addition is implemented here. 993 * The supported fields behave as follows: 994 * <ul> 995 * <li>{@code NANOS} - 996 * Returns a {@code LocalTime} with the specified number of nanoseconds added. 997 * This is equivalent to {@link #plusNanos(long)}. 998 * <li>{@code MICROS} - 999 * Returns a {@code LocalTime} with the specified number of microseconds added. 1000 * This is equivalent to {@link #plusNanos(long)} with the amount 1001 * multiplied by 1,000. 1002 * <li>{@code MILLIS} - 1003 * Returns a {@code LocalTime} with the specified number of milliseconds added. 1004 * This is equivalent to {@link #plusNanos(long)} with the amount 1005 * multiplied by 1,000,000. 1006 * <li>{@code SECONDS} - 1007 * Returns a {@code LocalTime} with the specified number of seconds added. 1008 * This is equivalent to {@link #plusSeconds(long)}. 1009 * <li>{@code MINUTES} - 1010 * Returns a {@code LocalTime} with the specified number of minutes added. 1011 * This is equivalent to {@link #plusMinutes(long)}. 1012 * <li>{@code HOURS} - 1013 * Returns a {@code LocalTime} with the specified number of hours added. 1014 * This is equivalent to {@link #plusHours(long)}. 1015 * <li>{@code HALF_DAYS} - 1016 * Returns a {@code LocalTime} with the specified number of half-days added. 1017 * This is equivalent to {@link #plusHours(long)} with the amount 1018 * multiplied by 12. 1019 * </ul> 1020 * <p> 1021 * All other {@code ChronoUnit} instances will throw an {@code UnsupportedTemporalTypeException}. 1022 * <p> 1023 * If the field is not a {@code ChronoUnit}, then the result of this method 1024 * is obtained by invoking {@code TemporalUnit.addTo(Temporal, long)} 1025 * passing {@code this} as the argument. In this case, the unit determines 1026 * whether and how to perform the addition. 1027 * <p> 1028 * This instance is immutable and unaffected by this method call. 1029 * 1030 * @param amountToAdd the amount of the unit to add to the result, may be negative 1031 * @param unit the unit of the amount to add, not null 1032 * @return a {@code LocalTime} based on this time with the specified amount added, not null 1033 * @throws DateTimeException if the addition cannot be made 1034 * @throws UnsupportedTemporalTypeException if the unit is not supported 1035 * @throws ArithmeticException if numeric overflow occurs 1036 */ 1037 @Override 1038 public LocalTime plus(long amountToAdd, TemporalUnit unit) { 1039 if (unit instanceof ChronoUnit) { 1040 switch ((ChronoUnit) unit) { 1041 case NANOS: return plusNanos(amountToAdd); 1042 case MICROS: return plusNanos((amountToAdd % MICROS_PER_DAY) * 1000); 1043 case MILLIS: return plusNanos((amountToAdd % MILLIS_PER_DAY) * 1000_000); 1044 case SECONDS: return plusSeconds(amountToAdd); 1045 case MINUTES: return plusMinutes(amountToAdd); 1046 case HOURS: return plusHours(amountToAdd); 1047 case HALF_DAYS: return plusHours((amountToAdd % 2) * 12); 1048 } 1049 throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); 1050 } 1051 return unit.addTo(this, amountToAdd); 1052 } 1053 1054 //----------------------------------------------------------------------- 1055 /** 1056 * Returns a copy of this {@code LocalTime} with the specified number of hours added. 1057 * <p> 1058 * This adds the specified number of hours to this time, returning a new time. 1059 * The calculation wraps around midnight. 1060 * <p> 1061 * This instance is immutable and unaffected by this method call. 1062 * 1063 * @param hoursToAdd the hours to add, may be negative 1064 * @return a {@code LocalTime} based on this time with the hours added, not null 1065 */ 1066 public LocalTime plusHours(long hoursToAdd) { 1067 if (hoursToAdd == 0) { 1068 return this; 1069 } 1070 int newHour = ((int) (hoursToAdd % HOURS_PER_DAY) + hour + HOURS_PER_DAY) % HOURS_PER_DAY; 1071 return create(newHour, minute, second, nano); 1072 } 1073 1074 /** 1075 * Returns a copy of this {@code LocalTime} with the specified number of minutes added. 1076 * <p> 1077 * This adds the specified number of minutes to this time, returning a new time. 1078 * The calculation wraps around midnight. 1079 * <p> 1080 * This instance is immutable and unaffected by this method call. 1081 * 1082 * @param minutesToAdd the minutes to add, may be negative 1083 * @return a {@code LocalTime} based on this time with the minutes added, not null 1084 */ 1085 public LocalTime plusMinutes(long minutesToAdd) { 1086 if (minutesToAdd == 0) { 1087 return this; 1088 } 1089 int mofd = hour * MINUTES_PER_HOUR + minute; 1090 int newMofd = ((int) (minutesToAdd % MINUTES_PER_DAY) + mofd + MINUTES_PER_DAY) % MINUTES_PER_DAY; 1091 if (mofd == newMofd) { 1092 return this; 1093 } 1094 int newHour = newMofd / MINUTES_PER_HOUR; 1095 int newMinute = newMofd % MINUTES_PER_HOUR; 1096 return create(newHour, newMinute, second, nano); 1097 } 1098 1099 /** 1100 * Returns a copy of this {@code LocalTime} with the specified number of seconds added. 1101 * <p> 1102 * This adds the specified number of seconds to this time, returning a new time. 1103 * The calculation wraps around midnight. 1104 * <p> 1105 * This instance is immutable and unaffected by this method call. 1106 * 1107 * @param secondstoAdd the seconds to add, may be negative 1108 * @return a {@code LocalTime} based on this time with the seconds added, not null 1109 */ 1110 public LocalTime plusSeconds(long secondstoAdd) { 1111 if (secondstoAdd == 0) { 1112 return this; 1113 } 1114 int sofd = hour * SECONDS_PER_HOUR + 1115 minute * SECONDS_PER_MINUTE + second; 1116 int newSofd = ((int) (secondstoAdd % SECONDS_PER_DAY) + sofd + SECONDS_PER_DAY) % SECONDS_PER_DAY; 1117 if (sofd == newSofd) { 1118 return this; 1119 } 1120 int newHour = newSofd / SECONDS_PER_HOUR; 1121 int newMinute = (newSofd / SECONDS_PER_MINUTE) % MINUTES_PER_HOUR; 1122 int newSecond = newSofd % SECONDS_PER_MINUTE; 1123 return create(newHour, newMinute, newSecond, nano); 1124 } 1125 1126 /** 1127 * Returns a copy of this {@code LocalTime} with the specified number of nanoseconds added. 1128 * <p> 1129 * This adds the specified number of nanoseconds to this time, returning a new time. 1130 * The calculation wraps around midnight. 1131 * <p> 1132 * This instance is immutable and unaffected by this method call. 1133 * 1134 * @param nanosToAdd the nanos to add, may be negative 1135 * @return a {@code LocalTime} based on this time with the nanoseconds added, not null 1136 */ 1137 public LocalTime plusNanos(long nanosToAdd) { 1138 if (nanosToAdd == 0) { 1139 return this; 1140 } 1141 long nofd = toNanoOfDay(); 1142 long newNofd = ((nanosToAdd % NANOS_PER_DAY) + nofd + NANOS_PER_DAY) % NANOS_PER_DAY; 1143 if (nofd == newNofd) { 1144 return this; 1145 } 1146 int newHour = (int) (newNofd / NANOS_PER_HOUR); 1147 int newMinute = (int) ((newNofd / NANOS_PER_MINUTE) % MINUTES_PER_HOUR); 1148 int newSecond = (int) ((newNofd / NANOS_PER_SECOND) % SECONDS_PER_MINUTE); 1149 int newNano = (int) (newNofd % NANOS_PER_SECOND); 1150 return create(newHour, newMinute, newSecond, newNano); 1151 } 1152 1153 //----------------------------------------------------------------------- 1154 /** 1155 * Returns a copy of this time with the specified amount subtracted. 1156 * <p> 1157 * This returns a {@code LocalTime}, based on this one, with the specified amount subtracted. 1158 * The amount is typically {@link Duration} but may be any other type implementing 1159 * the {@link TemporalAmount} interface. 1160 * <p> 1161 * The calculation is delegated to the amount object by calling 1162 * {@link TemporalAmount#subtractFrom(Temporal)}. The amount implementation is free 1163 * to implement the subtraction in any way it wishes, however it typically 1164 * calls back to {@link #minus(long, TemporalUnit)}. Consult the documentation 1165 * of the amount implementation to determine if it can be successfully subtracted. 1166 * <p> 1167 * This instance is immutable and unaffected by this method call. 1168 * 1169 * @param amountToSubtract the amount to subtract, not null 1170 * @return a {@code LocalTime} based on this time with the subtraction made, not null 1171 * @throws DateTimeException if the subtraction cannot be made 1172 * @throws ArithmeticException if numeric overflow occurs 1173 */ 1174 @Override 1175 public LocalTime minus(TemporalAmount amountToSubtract) { 1176 return (LocalTime) amountToSubtract.subtractFrom(this); 1177 } 1178 1179 /** 1180 * Returns a copy of this time with the specified amount subtracted. 1181 * <p> 1182 * This returns a {@code LocalTime}, based on this one, with the amount 1183 * in terms of the unit subtracted. If it is not possible to subtract the amount, 1184 * because the unit is not supported or for some other reason, an exception is thrown. 1185 * <p> 1186 * This method is equivalent to {@link #plus(long, TemporalUnit)} with the amount negated. 1187 * See that method for a full description of how addition, and thus subtraction, works. 1188 * <p> 1189 * This instance is immutable and unaffected by this method call. 1190 * 1191 * @param amountToSubtract the amount of the unit to subtract from the result, may be negative 1192 * @param unit the unit of the amount to subtract, not null 1193 * @return a {@code LocalTime} based on this time with the specified amount subtracted, not null 1194 * @throws DateTimeException if the subtraction cannot be made 1195 * @throws UnsupportedTemporalTypeException if the unit is not supported 1196 * @throws ArithmeticException if numeric overflow occurs 1197 */ 1198 @Override 1199 public LocalTime minus(long amountToSubtract, TemporalUnit unit) { 1200 return (amountToSubtract == Long.MIN_VALUE ? plus(Long.MAX_VALUE, unit).plus(1, unit) : plus(-amountToSubtract, unit)); 1201 } 1202 1203 //----------------------------------------------------------------------- 1204 /** 1205 * Returns a copy of this {@code LocalTime} with the specified number of hours subtracted. 1206 * <p> 1207 * This subtracts the specified number of hours from this time, returning a new time. 1208 * The calculation wraps around midnight. 1209 * <p> 1210 * This instance is immutable and unaffected by this method call. 1211 * 1212 * @param hoursToSubtract the hours to subtract, may be negative 1213 * @return a {@code LocalTime} based on this time with the hours subtracted, not null 1214 */ 1215 public LocalTime minusHours(long hoursToSubtract) { 1216 return plusHours(-(hoursToSubtract % HOURS_PER_DAY)); 1217 } 1218 1219 /** 1220 * Returns a copy of this {@code LocalTime} with the specified number of minutes subtracted. 1221 * <p> 1222 * This subtracts the specified number of minutes from this time, returning a new time. 1223 * The calculation wraps around midnight. 1224 * <p> 1225 * This instance is immutable and unaffected by this method call. 1226 * 1227 * @param minutesToSubtract the minutes to subtract, may be negative 1228 * @return a {@code LocalTime} based on this time with the minutes subtracted, not null 1229 */ 1230 public LocalTime minusMinutes(long minutesToSubtract) { 1231 return plusMinutes(-(minutesToSubtract % MINUTES_PER_DAY)); 1232 } 1233 1234 /** 1235 * Returns a copy of this {@code LocalTime} with the specified number of seconds subtracted. 1236 * <p> 1237 * This subtracts the specified number of seconds from this time, returning a new time. 1238 * The calculation wraps around midnight. 1239 * <p> 1240 * This instance is immutable and unaffected by this method call. 1241 * 1242 * @param secondsToSubtract the seconds to subtract, may be negative 1243 * @return a {@code LocalTime} based on this time with the seconds subtracted, not null 1244 */ 1245 public LocalTime minusSeconds(long secondsToSubtract) { 1246 return plusSeconds(-(secondsToSubtract % SECONDS_PER_DAY)); 1247 } 1248 1249 /** 1250 * Returns a copy of this {@code LocalTime} with the specified number of nanoseconds subtracted. 1251 * <p> 1252 * This subtracts the specified number of nanoseconds from this time, returning a new time. 1253 * The calculation wraps around midnight. 1254 * <p> 1255 * This instance is immutable and unaffected by this method call. 1256 * 1257 * @param nanosToSubtract the nanos to subtract, may be negative 1258 * @return a {@code LocalTime} based on this time with the nanoseconds subtracted, not null 1259 */ 1260 public LocalTime minusNanos(long nanosToSubtract) { 1261 return plusNanos(-(nanosToSubtract % NANOS_PER_DAY)); 1262 } 1263 1264 //----------------------------------------------------------------------- 1265 /** 1266 * Queries this time using the specified query. 1267 * <p> 1268 * This queries this time using the specified query strategy object. 1269 * The {@code TemporalQuery} object defines the logic to be used to 1270 * obtain the result. Read the documentation of the query to understand 1271 * what the result of this method will be. 1272 * <p> 1273 * The result of this method is obtained by invoking the 1274 * {@link TemporalQuery#queryFrom(TemporalAccessor)} method on the 1275 * specified query passing {@code this} as the argument. 1276 * 1277 * @param <R> the type of the result 1278 * @param query the query to invoke, not null 1279 * @return the query result, null may be returned (defined by the query) 1280 * @throws DateTimeException if unable to query (defined by the query) 1281 * @throws ArithmeticException if numeric overflow occurs (defined by the query) 1282 */ 1283 @SuppressWarnings("unchecked") 1284 @Override 1285 public <R> R query(TemporalQuery<R> query) { 1286 if (query == TemporalQueries.chronology() || query == TemporalQueries.zoneId() || 1287 query == TemporalQueries.zone() || query == TemporalQueries.offset()) { 1288 return null; 1289 } else if (query == TemporalQueries.localTime()) { 1290 return (R) this; 1291 } else if (query == TemporalQueries.localDate()) { 1292 return null; 1293 } else if (query == TemporalQueries.precision()) { 1294 return (R) NANOS; 1295 } 1296 // inline TemporalAccessor.super.query(query) as an optimization 1297 // non-JDK classes are not permitted to make this optimization 1298 return query.queryFrom(this); 1299 } 1300 1301 /** 1302 * Adjusts the specified temporal object to have the same time as this object. 1303 * <p> 1304 * This returns a temporal object of the same observable type as the input 1305 * with the time changed to be the same as this. 1306 * <p> 1307 * The adjustment is equivalent to using {@link Temporal#with(TemporalField, long)} 1308 * passing {@link ChronoField#NANO_OF_DAY} as the field. 1309 * <p> 1310 * In most cases, it is clearer to reverse the calling pattern by using 1311 * {@link Temporal#with(TemporalAdjuster)}: 1312 * <pre> 1313 * // these two lines are equivalent, but the second approach is recommended 1314 * temporal = thisLocalTime.adjustInto(temporal); 1315 * temporal = temporal.with(thisLocalTime); 1316 * </pre> 1317 * <p> 1318 * This instance is immutable and unaffected by this method call. 1319 * 1320 * @param temporal the target object to be adjusted, not null 1321 * @return the adjusted object, not null 1322 * @throws DateTimeException if unable to make the adjustment 1323 * @throws ArithmeticException if numeric overflow occurs 1324 */ 1325 @Override 1326 public Temporal adjustInto(Temporal temporal) { 1327 return temporal.with(NANO_OF_DAY, toNanoOfDay()); 1328 } 1329 1330 /** 1331 * Calculates the amount of time until another time in terms of the specified unit. 1332 * <p> 1333 * This calculates the amount of time between two {@code LocalTime} 1334 * objects in terms of a single {@code TemporalUnit}. 1335 * The start and end points are {@code this} and the specified time. 1336 * The result will be negative if the end is before the start. 1337 * The {@code Temporal} passed to this method is converted to a 1338 * {@code LocalTime} using {@link #from(TemporalAccessor)}. 1339 * For example, the amount in hours between two times can be calculated 1340 * using {@code startTime.until(endTime, HOURS)}. 1341 * <p> 1342 * The calculation returns a whole number, representing the number of 1343 * complete units between the two times. 1344 * For example, the amount in hours between 11:30 and 13:29 will only 1345 * be one hour as it is one minute short of two hours. 1346 * <p> 1347 * There are two equivalent ways of using this method. 1348 * The first is to invoke this method. 1349 * The second is to use {@link TemporalUnit#between(Temporal, Temporal)}: 1350 * <pre> 1351 * // these two lines are equivalent 1352 * amount = start.until(end, MINUTES); 1353 * amount = MINUTES.between(start, end); 1354 * </pre> 1355 * The choice should be made based on which makes the code more readable. 1356 * <p> 1357 * The calculation is implemented in this method for {@link ChronoUnit}. 1358 * The units {@code NANOS}, {@code MICROS}, {@code MILLIS}, {@code SECONDS}, 1359 * {@code MINUTES}, {@code HOURS} and {@code HALF_DAYS} are supported. 1360 * Other {@code ChronoUnit} values will throw an exception. 1361 * <p> 1362 * If the unit is not a {@code ChronoUnit}, then the result of this method 1363 * is obtained by invoking {@code TemporalUnit.between(Temporal, Temporal)} 1364 * passing {@code this} as the first argument and the converted input temporal 1365 * as the second argument. 1366 * <p> 1367 * This instance is immutable and unaffected by this method call. 1368 * 1369 * @param endExclusive the end time, exclusive, which is converted to a {@code LocalTime}, not null 1370 * @param unit the unit to measure the amount in, not null 1371 * @return the amount of time between this time and the end time 1372 * @throws DateTimeException if the amount cannot be calculated, or the end 1373 * temporal cannot be converted to a {@code LocalTime} 1374 * @throws UnsupportedTemporalTypeException if the unit is not supported 1375 * @throws ArithmeticException if numeric overflow occurs 1376 */ 1377 @Override 1378 public long until(Temporal endExclusive, TemporalUnit unit) { 1379 LocalTime end = LocalTime.from(endExclusive); 1380 if (unit instanceof ChronoUnit) { 1381 long nanosUntil = end.toNanoOfDay() - toNanoOfDay(); // no overflow 1382 switch ((ChronoUnit) unit) { 1383 case NANOS: return nanosUntil; 1384 case MICROS: return nanosUntil / 1000; 1385 case MILLIS: return nanosUntil / 1000_000; 1386 case SECONDS: return nanosUntil / NANOS_PER_SECOND; 1387 case MINUTES: return nanosUntil / NANOS_PER_MINUTE; 1388 case HOURS: return nanosUntil / NANOS_PER_HOUR; 1389 case HALF_DAYS: return nanosUntil / (12 * NANOS_PER_HOUR); 1390 } 1391 throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit); 1392 } 1393 return unit.between(this, end); 1394 } 1395 1396 /** 1397 * Formats this time using the specified formatter. 1398 * <p> 1399 * This time will be passed to the formatter to produce a string. 1400 * 1401 * @param formatter the formatter to use, not null 1402 * @return the formatted time string, not null 1403 * @throws DateTimeException if an error occurs during printing 1404 */ 1405 public String format(DateTimeFormatter formatter) { 1406 Objects.requireNonNull(formatter, "formatter"); 1407 return formatter.format(this); 1408 } 1409 1410 //----------------------------------------------------------------------- 1411 /** 1412 * Combines this time with a date to create a {@code LocalDateTime}. 1413 * <p> 1414 * This returns a {@code LocalDateTime} formed from this time at the specified date. 1415 * All possible combinations of date and time are valid. 1416 * 1417 * @param date the date to combine with, not null 1418 * @return the local date-time formed from this time and the specified date, not null 1419 */ 1420 public LocalDateTime atDate(LocalDate date) { 1421 return LocalDateTime.of(date, this); 1422 } 1423 1424 /** 1425 * Combines this time with an offset to create an {@code OffsetTime}. 1426 * <p> 1427 * This returns an {@code OffsetTime} formed from this time at the specified offset. 1428 * All possible combinations of time and offset are valid. 1429 * 1430 * @param offset the offset to combine with, not null 1431 * @return the offset time formed from this time and the specified offset, not null 1432 */ 1433 public OffsetTime atOffset(ZoneOffset offset) { 1434 return OffsetTime.of(this, offset); 1435 } 1436 1437 //----------------------------------------------------------------------- 1438 /** 1439 * Extracts the time as seconds of day, 1440 * from {@code 0} to {@code 24 * 60 * 60 - 1}. 1441 * 1442 * @return the second-of-day equivalent to this time 1443 */ 1444 public int toSecondOfDay() { 1445 int total = hour * SECONDS_PER_HOUR; 1446 total += minute * SECONDS_PER_MINUTE; 1447 total += second; 1448 return total; 1449 } 1450 1451 /** 1452 * Extracts the time as nanos of day, 1453 * from {@code 0} to {@code 24 * 60 * 60 * 1,000,000,000 - 1}. 1454 * 1455 * @return the nano of day equivalent to this time 1456 */ 1457 public long toNanoOfDay() { 1458 long total = hour * NANOS_PER_HOUR; 1459 total += minute * NANOS_PER_MINUTE; 1460 total += second * NANOS_PER_SECOND; 1461 total += nano; 1462 return total; 1463 } 1464 1465 //----------------------------------------------------------------------- 1466 /** 1467 * Compares this time to another time. 1468 * <p> 1469 * The comparison is based on the time-line position of the local times within a day. 1470 * It is "consistent with equals", as defined by {@link Comparable}. 1471 * 1472 * @param other the other time to compare to, not null 1473 * @return the comparator value, negative if less, positive if greater 1474 * @throws NullPointerException if {@code other} is null 1475 */ 1476 @Override 1477 public int compareTo(LocalTime other) { 1478 int cmp = Integer.compare(hour, other.hour); 1479 if (cmp == 0) { 1480 cmp = Integer.compare(minute, other.minute); 1481 if (cmp == 0) { 1482 cmp = Integer.compare(second, other.second); 1483 if (cmp == 0) { 1484 cmp = Integer.compare(nano, other.nano); 1485 } 1486 } 1487 } 1488 return cmp; 1489 } 1490 1491 /** 1492 * Checks if this time is after the specified time. 1493 * <p> 1494 * The comparison is based on the time-line position of the time within a day. 1495 * 1496 * @param other the other time to compare to, not null 1497 * @return true if this is after the specified time 1498 * @throws NullPointerException if {@code other} is null 1499 */ 1500 public boolean isAfter(LocalTime other) { 1501 return compareTo(other) > 0; 1502 } 1503 1504 /** 1505 * Checks if this time is before the specified time. 1506 * <p> 1507 * The comparison is based on the time-line position of the time within a day. 1508 * 1509 * @param other the other time to compare to, not null 1510 * @return true if this point is before the specified time 1511 * @throws NullPointerException if {@code other} is null 1512 */ 1513 public boolean isBefore(LocalTime other) { 1514 return compareTo(other) < 0; 1515 } 1516 1517 //----------------------------------------------------------------------- 1518 /** 1519 * Checks if this time is equal to another time. 1520 * <p> 1521 * The comparison is based on the time-line position of the time within a day. 1522 * <p> 1523 * Only objects of type {@code LocalTime} are compared, other types return false. 1524 * To compare the date of two {@code TemporalAccessor} instances, use 1525 * {@link ChronoField#NANO_OF_DAY} as a comparator. 1526 * 1527 * @param obj the object to check, null returns false 1528 * @return true if this is equal to the other time 1529 */ 1530 @Override 1531 public boolean equals(Object obj) { 1532 if (this == obj) { 1533 return true; 1534 } 1535 if (obj instanceof LocalTime) { 1536 LocalTime other = (LocalTime) obj; 1537 return hour == other.hour && minute == other.minute && 1538 second == other.second && nano == other.nano; 1539 } 1540 return false; 1541 } 1542 1543 /** 1544 * A hash code for this time. 1545 * 1546 * @return a suitable hash code 1547 */ 1548 @Override 1549 public int hashCode() { 1550 long nod = toNanoOfDay(); 1551 return (int) (nod ^ (nod >>> 32)); 1552 } 1553 1554 //----------------------------------------------------------------------- 1555 /** 1556 * Outputs this time as a {@code String}, such as {@code 10:15}. 1557 * <p> 1558 * The output will be one of the following ISO-8601 formats: 1559 * <ul> 1560 * <li>{@code HH:mm}</li> 1561 * <li>{@code HH:mm:ss}</li> 1562 * <li>{@code HH:mm:ss.SSS}</li> 1563 * <li>{@code HH:mm:ss.SSSSSS}</li> 1564 * <li>{@code HH:mm:ss.SSSSSSSSS}</li> 1565 * </ul> 1566 * The format used will be the shortest that outputs the full value of 1567 * the time where the omitted parts are implied to be zero. 1568 * 1569 * @return a string representation of this time, not null 1570 */ 1571 @Override 1572 public String toString() { 1573 StringBuilder buf = new StringBuilder(18); 1574 int hourValue = hour; 1575 int minuteValue = minute; 1576 int secondValue = second; 1577 int nanoValue = nano; 1578 buf.append(hourValue < 10 ? "0" : "").append(hourValue) 1579 .append(minuteValue < 10 ? ":0" : ":").append(minuteValue); 1580 if (secondValue > 0 || nanoValue > 0) { 1581 buf.append(secondValue < 10 ? ":0" : ":").append(secondValue); 1582 if (nanoValue > 0) { 1583 buf.append('.'); 1584 if (nanoValue % 1000_000 == 0) { 1585 buf.append(Integer.toString((nanoValue / 1000_000) + 1000).substring(1)); 1586 } else if (nanoValue % 1000 == 0) { 1587 buf.append(Integer.toString((nanoValue / 1000) + 1000_000).substring(1)); 1588 } else { 1589 buf.append(Integer.toString((nanoValue) + 1000_000_000).substring(1)); 1590 } 1591 } 1592 } 1593 return buf.toString(); 1594 } 1595 1596 //----------------------------------------------------------------------- 1597 /** 1598 * Writes the object using a 1599 * <a href="../../serialized-form.html#java.time.Ser">dedicated serialized form</a>. 1600 * @serialData 1601 * A twos-complement value indicates the remaining values are not in the stream 1602 * and should be set to zero. 1603 * <pre> 1604 * out.writeByte(4); // identifies a LocalTime 1605 * if (nano == 0) { 1606 * if (second == 0) { 1607 * if (minute == 0) { 1608 * out.writeByte(~hour); 1609 * } else { 1610 * out.writeByte(hour); 1611 * out.writeByte(~minute); 1612 * } 1613 * } else { 1614 * out.writeByte(hour); 1615 * out.writeByte(minute); 1616 * out.writeByte(~second); 1617 * } 1618 * } else { 1619 * out.writeByte(hour); 1620 * out.writeByte(minute); 1621 * out.writeByte(second); 1622 * out.writeInt(nano); 1623 * } 1624 * </pre> 1625 * 1626 * @return the instance of {@code Ser}, not null 1627 */ 1628 private Object writeReplace() { 1629 return new Ser(Ser.LOCAL_TIME_TYPE, this); 1630 } 1631 1632 /** 1633 * Defend against malicious streams. 1634 * 1635 * @param s the stream to read 1636 * @throws InvalidObjectException always 1637 */ 1638 private void readObject(ObjectInputStream s) throws InvalidObjectException { 1639 throw new InvalidObjectException("Deserialization via serialization delegate"); 1640 } 1641 1642 void writeExternal(DataOutput out) throws IOException { 1643 if (nano == 0) { 1644 if (second == 0) { 1645 if (minute == 0) { 1646 out.writeByte(~hour); 1647 } else { 1648 out.writeByte(hour); 1649 out.writeByte(~minute); 1650 } 1651 } else { 1652 out.writeByte(hour); 1653 out.writeByte(minute); 1654 out.writeByte(~second); 1655 } 1656 } else { 1657 out.writeByte(hour); 1658 out.writeByte(minute); 1659 out.writeByte(second); 1660 out.writeInt(nano); 1661 } 1662 } 1663 1664 static LocalTime readExternal(DataInput in) throws IOException { 1665 int hour = in.readByte(); 1666 int minute = 0; 1667 int second = 0; 1668 int nano = 0; 1669 if (hour < 0) { 1670 hour = ~hour; 1671 } else { 1672 minute = in.readByte(); 1673 if (minute < 0) { 1674 minute = ~minute; 1675 } else { 1676 second = in.readByte(); 1677 if (second < 0) { 1678 second = ~second; 1679 } else { 1680 nano = in.readInt(); 1681 } 1682 } 1683 } 1684 return LocalTime.of(hour, minute, second, nano); 1685 } 1686 1687} 1688