1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. Oracle designates this 9 * particular file as subject to the "Classpath" exception as provided 10 * by Oracle in the LICENSE file that accompanied this code. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 23 * or visit www.oracle.com if you need additional information or have any 24 * questions. 25 */ 26 27 package java.util; 28 29 import java.text.DateFormat; 30 import java.time.LocalDate; 31 import java.io.IOException; 32 import java.io.ObjectOutputStream; 33 import java.io.ObjectInputStream; 34 import java.lang.ref.SoftReference; 35 import java.time.Instant; 36 import sun.util.calendar.BaseCalendar; 37 import sun.util.calendar.CalendarDate; 38 import sun.util.calendar.CalendarSystem; 39 import sun.util.calendar.CalendarUtils; 40 import sun.util.calendar.Era; 41 import sun.util.calendar.Gregorian; 42 43 /** 44 * The class {@code Date} represents a specific instant 45 * in time, with millisecond precision. 46 * <p> 47 * Prior to JDK 1.1, the class {@code Date} had two additional 48 * functions. It allowed the interpretation of dates as year, month, day, hour, 49 * minute, and second values. It also allowed the formatting and parsing 50 * of date strings. Unfortunately, the API for these functions was not 51 * amenable to internationalization. As of JDK 1.1, the 52 * {@code Calendar} class should be used to convert between dates and time 53 * fields and the {@code DateFormat} class should be used to format and 54 * parse date strings. 55 * The corresponding methods in {@code Date} are deprecated. 56 * <p> 57 * Although the {@code Date} class is intended to reflect 58 * coordinated universal time (UTC), it may not do so exactly, 59 * depending on the host environment of the Java Virtual Machine. 60 * Nearly all modern operating systems assume that 1 day = 61 * 24 × 60 × 60 = 86400 seconds 62 * in all cases. In UTC, however, about once every year or two there 63 * is an extra second, called a "leap second." The leap 64 * second is always added as the last second of the day, and always 65 * on December 31 or June 30. For example, the last minute of the 66 * year 1995 was 61 seconds long, thanks to an added leap second. 67 * Most computer clocks are not accurate enough to be able to reflect 68 * the leap-second distinction. 69 * <p> 70 * Some computer standards are defined in terms of Greenwich mean 71 * time (GMT), which is equivalent to universal time (UT). GMT is 72 * the "civil" name for the standard; UT is the 73 * "scientific" name for the same standard. The 74 * distinction between UTC and UT is that UTC is based on an atomic 75 * clock and UT is based on astronomical observations, which for all 76 * practical purposes is an invisibly fine hair to split. Because the 77 * earth's rotation is not uniform (it slows down and speeds up 78 * in complicated ways), UT does not always flow uniformly. Leap 79 * seconds are introduced as needed into UTC so as to keep UTC within 80 * 0.9 seconds of UT1, which is a version of UT with certain 81 * corrections applied. There are other time and date systems as 82 * well; for example, the time scale used by the satellite-based 83 * global positioning system (GPS) is synchronized to UTC but is 84 * <i>not</i> adjusted for leap seconds. An interesting source of 85 * further information is the United States Naval Observatory (USNO): 86 * <blockquote><pre> 87 * <a href="https://www.usno.navy.mil/USNO">https://www.usno.navy.mil/USNO</a> 88 * </pre></blockquote> 89 * <p> 90 * and the material regarding "Systems of Time" at: 91 * <blockquote><pre> 92 * <a href="https://www.usno.navy.mil/USNO/time/master-clock/systems-of-time">https://www.usno.navy.mil/USNO/time/master-clock/systems-of-time</a> 93 * </pre></blockquote> 94 * <p> 95 * which has descriptions of various different time systems including 96 * UT, UT1, and UTC. 97 * <p> 98 * In all methods of class {@code Date} that accept or return 99 * year, month, date, hours, minutes, and seconds values, the 100 * following representations are used: 101 * <ul> 102 * <li>A year <i>y</i> is represented by the integer 103 * <i>y</i> {@code - 1900}. 104 * <li>A month is represented by an integer from 0 to 11; 0 is January, 105 * 1 is February, and so forth; thus 11 is December. 106 * <li>A date (day of month) is represented by an integer from 1 to 31 107 * in the usual manner. 108 * <li>An hour is represented by an integer from 0 to 23. Thus, the hour 109 * from midnight to 1 a.m. is hour 0, and the hour from noon to 1 110 * p.m. is hour 12. 111 * <li>A minute is represented by an integer from 0 to 59 in the usual manner. 112 * <li>A second is represented by an integer from 0 to 61; the values 60 and 113 * 61 occur only for leap seconds and even then only in Java 114 * implementations that actually track leap seconds correctly. Because 115 * of the manner in which leap seconds are currently introduced, it is 116 * extremely unlikely that two leap seconds will occur in the same 117 * minute, but this specification follows the date and time conventions 118 * for ISO C. 119 * </ul> 120 * <p> 121 * In all cases, arguments given to methods for these purposes need 122 * not fall within the indicated ranges; for example, a date may be 123 * specified as January 32 and is interpreted as meaning February 1. 124 * 125 * @author James Gosling 126 * @author Arthur van Hoff 127 * @author Alan Liu 128 * @see java.text.DateFormat 129 * @see java.util.Calendar 130 * @see java.util.TimeZone 131 * @since 1.0 132 */ 133 public class Date 134 implements java.io.Serializable, Cloneable, Comparable<Date> 135 { 136 private static final BaseCalendar gcal = 137 CalendarSystem.getGregorianCalendar(); 138 private static BaseCalendar jcal; 139 140 private transient long fastTime; 141 142 /* 143 * If cdate is null, then fastTime indicates the time in millis. 144 * If cdate.isNormalized() is true, then fastTime and cdate are in 145 * synch. Otherwise, fastTime is ignored, and cdate indicates the 146 * time. 147 */ 148 private transient BaseCalendar.Date cdate; 149 150 // Initialized just before the value is used. See parse(). 151 private static int defaultCenturyStart; 152 153 /* use serialVersionUID from modified java.util.Date for 154 * interoperability with JDK1.1. The Date was modified to write 155 * and read only the UTC time. 156 */ 157 @java.io.Serial 158 private static final long serialVersionUID = 7523967970034938905L; 159 160 /** 161 * Allocates a {@code Date} object and initializes it so that 162 * it represents the time at which it was allocated, measured to the 163 * nearest millisecond. 164 * 165 * @see java.lang.System#currentTimeMillis() 166 */ Date()167 public Date() { 168 this(System.currentTimeMillis()); 169 } 170 171 /** 172 * Allocates a {@code Date} object and initializes it to 173 * represent the specified number of milliseconds since the 174 * standard base time known as "the epoch", namely January 1, 175 * 1970, 00:00:00 GMT. 176 * 177 * @param date the milliseconds since January 1, 1970, 00:00:00 GMT. 178 * @see java.lang.System#currentTimeMillis() 179 */ Date(long date)180 public Date(long date) { 181 fastTime = date; 182 } 183 184 /** 185 * Allocates a {@code Date} object and initializes it so that 186 * it represents midnight, local time, at the beginning of the day 187 * specified by the {@code year}, {@code month}, and 188 * {@code date} arguments. 189 * 190 * @param year the year minus 1900. 191 * @param month the month between 0-11. 192 * @param date the day of the month between 1-31. 193 * @see java.util.Calendar 194 * @deprecated As of JDK version 1.1, 195 * replaced by {@code Calendar.set(year + 1900, month, date)} 196 * or {@code GregorianCalendar(year + 1900, month, date)}. 197 */ 198 @Deprecated Date(int year, int month, int date)199 public Date(int year, int month, int date) { 200 this(year, month, date, 0, 0, 0); 201 } 202 203 /** 204 * Allocates a {@code Date} object and initializes it so that 205 * it represents the instant at the start of the minute specified by 206 * the {@code year}, {@code month}, {@code date}, 207 * {@code hrs}, and {@code min} arguments, in the local 208 * time zone. 209 * 210 * @param year the year minus 1900. 211 * @param month the month between 0-11. 212 * @param date the day of the month between 1-31. 213 * @param hrs the hours between 0-23. 214 * @param min the minutes between 0-59. 215 * @see java.util.Calendar 216 * @deprecated As of JDK version 1.1, 217 * replaced by {@code Calendar.set(year + 1900, month, date, hrs, min)} 218 * or {@code GregorianCalendar(year + 1900, month, date, hrs, min)}. 219 */ 220 @Deprecated Date(int year, int month, int date, int hrs, int min)221 public Date(int year, int month, int date, int hrs, int min) { 222 this(year, month, date, hrs, min, 0); 223 } 224 225 /** 226 * Allocates a {@code Date} object and initializes it so that 227 * it represents the instant at the start of the second specified 228 * by the {@code year}, {@code month}, {@code date}, 229 * {@code hrs}, {@code min}, and {@code sec} arguments, 230 * in the local time zone. 231 * 232 * @param year the year minus 1900. 233 * @param month the month between 0-11. 234 * @param date the day of the month between 1-31. 235 * @param hrs the hours between 0-23. 236 * @param min the minutes between 0-59. 237 * @param sec the seconds between 0-59. 238 * @see java.util.Calendar 239 * @deprecated As of JDK version 1.1, 240 * replaced by {@code Calendar.set(year + 1900, month, date, hrs, min, sec)} 241 * or {@code GregorianCalendar(year + 1900, month, date, hrs, min, sec)}. 242 */ 243 @Deprecated Date(int year, int month, int date, int hrs, int min, int sec)244 public Date(int year, int month, int date, int hrs, int min, int sec) { 245 int y = year + 1900; 246 // month is 0-based. So we have to normalize month to support Long.MAX_VALUE. 247 if (month >= 12) { 248 y += month / 12; 249 month %= 12; 250 } else if (month < 0) { 251 y += CalendarUtils.floorDivide(month, 12); 252 month = CalendarUtils.mod(month, 12); 253 } 254 BaseCalendar cal = getCalendarSystem(y); 255 cdate = (BaseCalendar.Date) cal.newCalendarDate(TimeZone.getDefaultRef()); 256 cdate.setNormalizedDate(y, month + 1, date).setTimeOfDay(hrs, min, sec, 0); 257 getTimeImpl(); 258 cdate = null; 259 } 260 261 /** 262 * Allocates a {@code Date} object and initializes it so that 263 * it represents the date and time indicated by the string 264 * {@code s}, which is interpreted as if by the 265 * {@link Date#parse} method. 266 * 267 * @param s a string representation of the date. 268 * @see java.text.DateFormat 269 * @see java.util.Date#parse(java.lang.String) 270 * @deprecated As of JDK version 1.1, 271 * replaced by {@code DateFormat.parse(String s)}. 272 */ 273 @Deprecated Date(String s)274 public Date(String s) { 275 this(parse(s)); 276 } 277 278 /** 279 * Return a copy of this object. 280 */ clone()281 public Object clone() { 282 Date d = null; 283 try { 284 d = (Date)super.clone(); 285 if (cdate != null) { 286 d.cdate = (BaseCalendar.Date) cdate.clone(); 287 } 288 } catch (CloneNotSupportedException e) {} // Won't happen 289 return d; 290 } 291 292 /** 293 * Determines the date and time based on the arguments. The 294 * arguments are interpreted as a year, month, day of the month, 295 * hour of the day, minute within the hour, and second within the 296 * minute, exactly as for the {@code Date} constructor with six 297 * arguments, except that the arguments are interpreted relative 298 * to UTC rather than to the local time zone. The time indicated is 299 * returned represented as the distance, measured in milliseconds, 300 * of that time from the epoch (00:00:00 GMT on January 1, 1970). 301 * 302 * @param year the year minus 1900. 303 * @param month the month between 0-11. 304 * @param date the day of the month between 1-31. 305 * @param hrs the hours between 0-23. 306 * @param min the minutes between 0-59. 307 * @param sec the seconds between 0-59. 308 * @return the number of milliseconds since January 1, 1970, 00:00:00 GMT for 309 * the date and time specified by the arguments. 310 * @see java.util.Calendar 311 * @deprecated As of JDK version 1.1, 312 * replaced by {@code Calendar.set(year + 1900, month, date, hrs, min, sec)} 313 * or {@code GregorianCalendar(year + 1900, month, date, hrs, min, sec)}, using a UTC 314 * {@code TimeZone}, followed by {@code Calendar.getTime().getTime()}. 315 */ 316 @Deprecated UTC(int year, int month, int date, int hrs, int min, int sec)317 public static long UTC(int year, int month, int date, 318 int hrs, int min, int sec) { 319 int y = year + 1900; 320 // month is 0-based. So we have to normalize month to support Long.MAX_VALUE. 321 if (month >= 12) { 322 y += month / 12; 323 month %= 12; 324 } else if (month < 0) { 325 y += CalendarUtils.floorDivide(month, 12); 326 month = CalendarUtils.mod(month, 12); 327 } 328 int m = month + 1; 329 BaseCalendar cal = getCalendarSystem(y); 330 BaseCalendar.Date udate = (BaseCalendar.Date) cal.newCalendarDate(null); 331 udate.setNormalizedDate(y, m, date).setTimeOfDay(hrs, min, sec, 0); 332 333 // Use a Date instance to perform normalization. Its fastTime 334 // is the UTC value after the normalization. 335 Date d = new Date(0); 336 d.normalize(udate); 337 return d.fastTime; 338 } 339 340 /** 341 * Attempts to interpret the string {@code s} as a representation 342 * of a date and time. If the attempt is successful, the time 343 * indicated is returned represented as the distance, measured in 344 * milliseconds, of that time from the epoch (00:00:00 GMT on 345 * January 1, 1970). If the attempt fails, an 346 * {@code IllegalArgumentException} is thrown. 347 * <p> 348 * It accepts many syntaxes; in particular, it recognizes the IETF 349 * standard date syntax: "Sat, 12 Aug 1995 13:30:00 GMT". It also 350 * understands the continental U.S. time-zone abbreviations, but for 351 * general use, a time-zone offset should be used: "Sat, 12 Aug 1995 352 * 13:30:00 GMT+0430" (4 hours, 30 minutes west of the Greenwich 353 * meridian). If no time zone is specified, the local time zone is 354 * assumed. GMT and UTC are considered equivalent. 355 * <p> 356 * The string {@code s} is processed from left to right, looking for 357 * data of interest. Any material in {@code s} that is within the 358 * ASCII parenthesis characters {@code (} and {@code )} is ignored. 359 * Parentheses may be nested. Otherwise, the only characters permitted 360 * within {@code s} are these ASCII characters: 361 * <blockquote><pre> 362 * abcdefghijklmnopqrstuvwxyz 363 * ABCDEFGHIJKLMNOPQRSTUVWXYZ 364 * 0123456789,+-:/</pre></blockquote> 365 * and whitespace characters.<p> 366 * A consecutive sequence of decimal digits is treated as a decimal 367 * number:<ul> 368 * <li>If a number is preceded by {@code +} or {@code -} and a year 369 * has already been recognized, then the number is a time-zone 370 * offset. If the number is less than 24, it is an offset measured 371 * in hours. Otherwise, it is regarded as an offset in minutes, 372 * expressed in 24-hour time format without punctuation. A 373 * preceding {@code -} means a westward offset. Time zone offsets 374 * are always relative to UTC (Greenwich). Thus, for example, 375 * {@code -5} occurring in the string would mean "five hours west 376 * of Greenwich" and {@code +0430} would mean "four hours and 377 * thirty minutes east of Greenwich." It is permitted for the 378 * string to specify {@code GMT}, {@code UT}, or {@code UTC} 379 * redundantly-for example, {@code GMT-5} or {@code utc+0430}. 380 * <li>The number is regarded as a year number if one of the 381 * following conditions is true: 382 * <ul> 383 * <li>The number is equal to or greater than 70 and followed by a 384 * space, comma, slash, or end of string 385 * <li>The number is less than 70, and both a month and a day of 386 * the month have already been recognized</li> 387 * </ul> 388 * If the recognized year number is less than 100, it is 389 * interpreted as an abbreviated year relative to a century of 390 * which dates are within 80 years before and 19 years after 391 * the time when the Date class is initialized. 392 * After adjusting the year number, 1900 is subtracted from 393 * it. For example, if the current year is 1999 then years in 394 * the range 19 to 99 are assumed to mean 1919 to 1999, while 395 * years from 0 to 18 are assumed to mean 2000 to 2018. Note 396 * that this is slightly different from the interpretation of 397 * years less than 100 that is used in {@link java.text.SimpleDateFormat}. 398 * <li>If the number is followed by a colon, it is regarded as an hour, 399 * unless an hour has already been recognized, in which case it is 400 * regarded as a minute. 401 * <li>If the number is followed by a slash, it is regarded as a month 402 * (it is decreased by 1 to produce a number in the range {@code 0} 403 * to {@code 11}), unless a month has already been recognized, in 404 * which case it is regarded as a day of the month. 405 * <li>If the number is followed by whitespace, a comma, a hyphen, or 406 * end of string, then if an hour has been recognized but not a 407 * minute, it is regarded as a minute; otherwise, if a minute has 408 * been recognized but not a second, it is regarded as a second; 409 * otherwise, it is regarded as a day of the month. </ul><p> 410 * A consecutive sequence of letters is regarded as a word and treated 411 * as follows:<ul> 412 * <li>A word that matches {@code AM}, ignoring case, is ignored (but 413 * the parse fails if an hour has not been recognized or is less 414 * than {@code 1} or greater than {@code 12}). 415 * <li>A word that matches {@code PM}, ignoring case, adds {@code 12} 416 * to the hour (but the parse fails if an hour has not been 417 * recognized or is less than {@code 1} or greater than {@code 12}). 418 * <li>Any word that matches any prefix of {@code SUNDAY, MONDAY, TUESDAY, 419 * WEDNESDAY, THURSDAY, FRIDAY}, or {@code SATURDAY}, ignoring 420 * case, is ignored. For example, {@code sat, Friday, TUE}, and 421 * {@code Thurs} are ignored. 422 * <li>Otherwise, any word that matches any prefix of {@code JANUARY, 423 * FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, 424 * OCTOBER, NOVEMBER}, or {@code DECEMBER}, ignoring case, and 425 * considering them in the order given here, is recognized as 426 * specifying a month and is converted to a number ({@code 0} to 427 * {@code 11}). For example, {@code aug, Sept, april}, and 428 * {@code NOV} are recognized as months. So is {@code Ma}, which 429 * is recognized as {@code MARCH}, not {@code MAY}. 430 * <li>Any word that matches {@code GMT, UT}, or {@code UTC}, ignoring 431 * case, is treated as referring to UTC. 432 * <li>Any word that matches {@code EST, CST, MST}, or {@code PST}, 433 * ignoring case, is recognized as referring to the time zone in 434 * North America that is five, six, seven, or eight hours west of 435 * Greenwich, respectively. Any word that matches {@code EDT, CDT, 436 * MDT}, or {@code PDT}, ignoring case, is recognized as 437 * referring to the same time zone, respectively, during daylight 438 * saving time.</ul><p> 439 * Once the entire string s has been scanned, it is converted to a time 440 * result in one of two ways. If a time zone or time-zone offset has been 441 * recognized, then the year, month, day of month, hour, minute, and 442 * second are interpreted in UTC and then the time-zone offset is 443 * applied. Otherwise, the year, month, day of month, hour, minute, and 444 * second are interpreted in the local time zone. 445 * 446 * @param s a string to be parsed as a date. 447 * @return the number of milliseconds since January 1, 1970, 00:00:00 GMT 448 * represented by the string argument. 449 * @see java.text.DateFormat 450 * @deprecated As of JDK version 1.1, 451 * replaced by {@code DateFormat.parse(String s)}. 452 */ 453 @Deprecated parse(String s)454 public static long parse(String s) { 455 int year = Integer.MIN_VALUE; 456 int mon = -1; 457 int mday = -1; 458 int hour = -1; 459 int min = -1; 460 int sec = -1; 461 int millis = -1; 462 int c = -1; 463 int i = 0; 464 int n = -1; 465 int wst = -1; 466 int tzoffset = -1; 467 int prevc = 0; 468 syntax: 469 { 470 if (s == null) 471 break syntax; 472 int limit = s.length(); 473 while (i < limit) { 474 c = s.charAt(i); 475 i++; 476 if (c <= ' ' || c == ',') 477 continue; 478 if (c == '(') { // skip comments 479 int depth = 1; 480 while (i < limit) { 481 c = s.charAt(i); 482 i++; 483 if (c == '(') depth++; 484 else if (c == ')') 485 if (--depth <= 0) 486 break; 487 } 488 continue; 489 } 490 if ('0' <= c && c <= '9') { 491 n = c - '0'; 492 while (i < limit && '0' <= (c = s.charAt(i)) && c <= '9') { 493 n = n * 10 + c - '0'; 494 i++; 495 } 496 if (prevc == '+' || prevc == '-' && year != Integer.MIN_VALUE) { 497 // BEGIN Android-changed: Android specific time zone logic 498 499 if (tzoffset != 0 && tzoffset != -1) 500 break syntax; 501 502 // timezone offset 503 if (n < 24) { 504 n = n * 60; // EG. "GMT-3" 505 506 // Support for Timezones of the form GMT-3:30. We look for an ':" and 507 // parse the number following it as loosely as the original hours 508 // section (i.e, no range or validity checks). 509 int minutesPart = 0; 510 if (i < limit && (s.charAt(i) == ':')) { 511 i++; 512 while (i < limit && '0' <= (c = s.charAt(i)) && c <= '9') { 513 minutesPart = (minutesPart * 10) + (c - '0'); 514 i++; 515 } 516 } 517 518 n += minutesPart; 519 } else { 520 n = (n % 100) + ((n / 100) * 60); // eg "GMT-0430" 521 } 522 523 if (prevc == '+') // plus means east of GMT 524 n = -n; 525 // END Android-changed: Android specific time zone logic 526 527 tzoffset = n; 528 } else if (n >= 70) 529 if (year != Integer.MIN_VALUE) 530 break syntax; 531 else if (c <= ' ' || c == ',' || c == '/' || i >= limit) 532 // year = n < 1900 ? n : n - 1900; 533 year = n; 534 else 535 break syntax; 536 else if (c == ':') 537 if (hour < 0) 538 hour = (byte) n; 539 else if (min < 0) 540 min = (byte) n; 541 else 542 break syntax; 543 else if (c == '/') 544 if (mon < 0) 545 mon = (byte) (n - 1); 546 else if (mday < 0) 547 mday = (byte) n; 548 else 549 break syntax; 550 else if (i < limit && c != ',' && c > ' ' && c != '-') 551 break syntax; 552 else if (hour >= 0 && min < 0) 553 min = (byte) n; 554 else if (min >= 0 && sec < 0) 555 sec = (byte) n; 556 else if (mday < 0) 557 mday = (byte) n; 558 // Handle two-digit years < 70 (70-99 handled above). 559 else if (year == Integer.MIN_VALUE && mon >= 0 && mday >= 0) 560 year = n; 561 else 562 break syntax; 563 prevc = 0; 564 } else if (c == '/' || c == ':' || c == '+' || c == '-') 565 prevc = c; 566 else { 567 int st = i - 1; 568 while (i < limit) { 569 c = s.charAt(i); 570 if (!('A' <= c && c <= 'Z' || 'a' <= c && c <= 'z')) 571 break; 572 i++; 573 } 574 if (i <= st + 1) 575 break syntax; 576 int k; 577 for (k = wtb.length; --k >= 0;) 578 if (wtb[k].regionMatches(true, 0, s, st, i - st)) { 579 int action = ttb[k]; 580 if (action != 0) { 581 if (action == 1) { // pm 582 if (hour > 12 || hour < 1) 583 break syntax; 584 else if (hour < 12) 585 hour += 12; 586 } else if (action == 14) { // am 587 if (hour > 12 || hour < 1) 588 break syntax; 589 else if (hour == 12) 590 hour = 0; 591 } else if (action <= 13) { // month! 592 if (mon < 0) 593 mon = (byte) (action - 2); 594 else 595 break syntax; 596 } else { 597 tzoffset = action - 10000; 598 } 599 } 600 break; 601 } 602 if (k < 0) 603 break syntax; 604 prevc = 0; 605 } 606 } 607 if (year == Integer.MIN_VALUE || mon < 0 || mday < 0) 608 break syntax; 609 // Parse 2-digit years within the correct default century. 610 if (year < 100) { 611 synchronized (Date.class) { 612 if (defaultCenturyStart == 0) { 613 defaultCenturyStart = gcal.getCalendarDate().getYear() - 80; 614 } 615 } 616 year += (defaultCenturyStart / 100) * 100; 617 if (year < defaultCenturyStart) year += 100; 618 } 619 if (sec < 0) 620 sec = 0; 621 if (min < 0) 622 min = 0; 623 if (hour < 0) 624 hour = 0; 625 BaseCalendar cal = getCalendarSystem(year); 626 if (tzoffset == -1) { // no time zone specified, have to use local 627 BaseCalendar.Date ldate = (BaseCalendar.Date) cal.newCalendarDate(TimeZone.getDefaultRef()); 628 ldate.setDate(year, mon + 1, mday); 629 ldate.setTimeOfDay(hour, min, sec, 0); 630 return cal.getTime(ldate); 631 } 632 BaseCalendar.Date udate = (BaseCalendar.Date) cal.newCalendarDate(null); // no time zone 633 udate.setDate(year, mon + 1, mday); 634 udate.setTimeOfDay(hour, min, sec, 0); 635 return cal.getTime(udate) + tzoffset * (60 * 1000); 636 } 637 // syntax error 638 throw new IllegalArgumentException(); 639 } 640 private static final String wtb[] = { 641 "am", "pm", 642 "monday", "tuesday", "wednesday", "thursday", "friday", 643 "saturday", "sunday", 644 "january", "february", "march", "april", "may", "june", 645 "july", "august", "september", "october", "november", "december", 646 "gmt", "ut", "utc", "est", "edt", "cst", "cdt", 647 "mst", "mdt", "pst", "pdt" 648 }; 649 private static final int ttb[] = { 650 14, 1, 0, 0, 0, 0, 0, 0, 0, 651 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 652 10000 + 0, 10000 + 0, 10000 + 0, // GMT/UT/UTC 653 10000 + 5 * 60, 10000 + 4 * 60, // EST/EDT 654 10000 + 6 * 60, 10000 + 5 * 60, // CST/CDT 655 10000 + 7 * 60, 10000 + 6 * 60, // MST/MDT 656 10000 + 8 * 60, 10000 + 7 * 60 // PST/PDT 657 }; 658 659 /** 660 * Returns a value that is the result of subtracting 1900 from the 661 * year that contains or begins with the instant in time represented 662 * by this {@code Date} object, as interpreted in the local 663 * time zone. 664 * 665 * @return the year represented by this date, minus 1900. 666 * @see java.util.Calendar 667 * @deprecated As of JDK version 1.1, 668 * replaced by {@code Calendar.get(Calendar.YEAR) - 1900}. 669 */ 670 @Deprecated getYear()671 public int getYear() { 672 return normalize().getYear() - 1900; 673 } 674 675 /** 676 * Sets the year of this {@code Date} object to be the specified 677 * value plus 1900. This {@code Date} object is modified so 678 * that it represents a point in time within the specified year, 679 * with the month, date, hour, minute, and second the same as 680 * before, as interpreted in the local time zone. (Of course, if 681 * the date was February 29, for example, and the year is set to a 682 * non-leap year, then the new date will be treated as if it were 683 * on March 1.) 684 * 685 * @param year the year value. 686 * @see java.util.Calendar 687 * @deprecated As of JDK version 1.1, 688 * replaced by {@code Calendar.set(Calendar.YEAR, year + 1900)}. 689 */ 690 @Deprecated setYear(int year)691 public void setYear(int year) { 692 getCalendarDate().setNormalizedYear(year + 1900); 693 } 694 695 /** 696 * Returns a number representing the month that contains or begins 697 * with the instant in time represented by this {@code Date} object. 698 * The value returned is between {@code 0} and {@code 11}, 699 * with the value {@code 0} representing January. 700 * 701 * @return the month represented by this date. 702 * @see java.util.Calendar 703 * @deprecated As of JDK version 1.1, 704 * replaced by {@code Calendar.get(Calendar.MONTH)}. 705 */ 706 @Deprecated getMonth()707 public int getMonth() { 708 return normalize().getMonth() - 1; // adjust 1-based to 0-based 709 } 710 711 /** 712 * Sets the month of this date to the specified value. This 713 * {@code Date} object is modified so that it represents a point 714 * in time within the specified month, with the year, date, hour, 715 * minute, and second the same as before, as interpreted in the 716 * local time zone. If the date was October 31, for example, and 717 * the month is set to June, then the new date will be treated as 718 * if it were on July 1, because June has only 30 days. 719 * 720 * @param month the month value between 0-11. 721 * @see java.util.Calendar 722 * @deprecated As of JDK version 1.1, 723 * replaced by {@code Calendar.set(Calendar.MONTH, int month)}. 724 */ 725 @Deprecated setMonth(int month)726 public void setMonth(int month) { 727 int y = 0; 728 if (month >= 12) { 729 y = month / 12; 730 month %= 12; 731 } else if (month < 0) { 732 y = CalendarUtils.floorDivide(month, 12); 733 month = CalendarUtils.mod(month, 12); 734 } 735 BaseCalendar.Date d = getCalendarDate(); 736 if (y != 0) { 737 d.setNormalizedYear(d.getNormalizedYear() + y); 738 } 739 d.setMonth(month + 1); // adjust 0-based to 1-based month numbering 740 } 741 742 /** 743 * Returns the day of the month represented by this {@code Date} object. 744 * The value returned is between {@code 1} and {@code 31} 745 * representing the day of the month that contains or begins with the 746 * instant in time represented by this {@code Date} object, as 747 * interpreted in the local time zone. 748 * 749 * @return the day of the month represented by this date. 750 * @see java.util.Calendar 751 * @deprecated As of JDK version 1.1, 752 * replaced by {@code Calendar.get(Calendar.DAY_OF_MONTH)}. 753 */ 754 @Deprecated getDate()755 public int getDate() { 756 return normalize().getDayOfMonth(); 757 } 758 759 /** 760 * Sets the day of the month of this {@code Date} object to the 761 * specified value. This {@code Date} object is modified so that 762 * it represents a point in time within the specified day of the 763 * month, with the year, month, hour, minute, and second the same 764 * as before, as interpreted in the local time zone. If the date 765 * was April 30, for example, and the date is set to 31, then it 766 * will be treated as if it were on May 1, because April has only 767 * 30 days. 768 * 769 * @param date the day of the month value between 1-31. 770 * @see java.util.Calendar 771 * @deprecated As of JDK version 1.1, 772 * replaced by {@code Calendar.set(Calendar.DAY_OF_MONTH, int date)}. 773 */ 774 @Deprecated setDate(int date)775 public void setDate(int date) { 776 getCalendarDate().setDayOfMonth(date); 777 } 778 779 /** 780 * Returns the day of the week represented by this date. The 781 * returned value ({@code 0} = Sunday, {@code 1} = Monday, 782 * {@code 2} = Tuesday, {@code 3} = Wednesday, {@code 4} = 783 * Thursday, {@code 5} = Friday, {@code 6} = Saturday) 784 * represents the day of the week that contains or begins with 785 * the instant in time represented by this {@code Date} object, 786 * as interpreted in the local time zone. 787 * 788 * @return the day of the week represented by this date. 789 * @see java.util.Calendar 790 * @deprecated As of JDK version 1.1, 791 * replaced by {@code Calendar.get(Calendar.DAY_OF_WEEK)}. 792 */ 793 @Deprecated getDay()794 public int getDay() { 795 return normalize().getDayOfWeek() - BaseCalendar.SUNDAY; 796 } 797 798 /** 799 * Returns the hour represented by this {@code Date} object. The 800 * returned value is a number ({@code 0} through {@code 23}) 801 * representing the hour within the day that contains or begins 802 * with the instant in time represented by this {@code Date} 803 * object, as interpreted in the local time zone. 804 * 805 * @return the hour represented by this date. 806 * @see java.util.Calendar 807 * @deprecated As of JDK version 1.1, 808 * replaced by {@code Calendar.get(Calendar.HOUR_OF_DAY)}. 809 */ 810 @Deprecated getHours()811 public int getHours() { 812 return normalize().getHours(); 813 } 814 815 /** 816 * Sets the hour of this {@code Date} object to the specified value. 817 * This {@code Date} object is modified so that it represents a point 818 * in time within the specified hour of the day, with the year, month, 819 * date, minute, and second the same as before, as interpreted in the 820 * local time zone. 821 * 822 * @param hours the hour value. 823 * @see java.util.Calendar 824 * @deprecated As of JDK version 1.1, 825 * replaced by {@code Calendar.set(Calendar.HOUR_OF_DAY, int hours)}. 826 */ 827 @Deprecated setHours(int hours)828 public void setHours(int hours) { 829 getCalendarDate().setHours(hours); 830 } 831 832 /** 833 * Returns the number of minutes past the hour represented by this date, 834 * as interpreted in the local time zone. 835 * The value returned is between {@code 0} and {@code 59}. 836 * 837 * @return the number of minutes past the hour represented by this date. 838 * @see java.util.Calendar 839 * @deprecated As of JDK version 1.1, 840 * replaced by {@code Calendar.get(Calendar.MINUTE)}. 841 */ 842 @Deprecated getMinutes()843 public int getMinutes() { 844 return normalize().getMinutes(); 845 } 846 847 /** 848 * Sets the minutes of this {@code Date} object to the specified value. 849 * This {@code Date} object is modified so that it represents a point 850 * in time within the specified minute of the hour, with the year, month, 851 * date, hour, and second the same as before, as interpreted in the 852 * local time zone. 853 * 854 * @param minutes the value of the minutes. 855 * @see java.util.Calendar 856 * @deprecated As of JDK version 1.1, 857 * replaced by {@code Calendar.set(Calendar.MINUTE, int minutes)}. 858 */ 859 @Deprecated setMinutes(int minutes)860 public void setMinutes(int minutes) { 861 getCalendarDate().setMinutes(minutes); 862 } 863 864 /** 865 * Returns the number of seconds past the minute represented by this date. 866 * The value returned is between {@code 0} and {@code 61}. The 867 * values {@code 60} and {@code 61} can only occur on those 868 * Java Virtual Machines that take leap seconds into account. 869 * 870 * @return the number of seconds past the minute represented by this date. 871 * @see java.util.Calendar 872 * @deprecated As of JDK version 1.1, 873 * replaced by {@code Calendar.get(Calendar.SECOND)}. 874 */ 875 @Deprecated getSeconds()876 public int getSeconds() { 877 return normalize().getSeconds(); 878 } 879 880 /** 881 * Sets the seconds of this {@code Date} to the specified value. 882 * This {@code Date} object is modified so that it represents a 883 * point in time within the specified second of the minute, with 884 * the year, month, date, hour, and minute the same as before, as 885 * interpreted in the local time zone. 886 * 887 * @param seconds the seconds value. 888 * @see java.util.Calendar 889 * @deprecated As of JDK version 1.1, 890 * replaced by {@code Calendar.set(Calendar.SECOND, int seconds)}. 891 */ 892 @Deprecated setSeconds(int seconds)893 public void setSeconds(int seconds) { 894 getCalendarDate().setSeconds(seconds); 895 } 896 897 /** 898 * Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT 899 * represented by this {@code Date} object. 900 * 901 * @return the number of milliseconds since January 1, 1970, 00:00:00 GMT 902 * represented by this date. 903 */ getTime()904 public long getTime() { 905 return getTimeImpl(); 906 } 907 getTimeImpl()908 private final long getTimeImpl() { 909 if (cdate != null && !cdate.isNormalized()) { 910 normalize(); 911 } 912 return fastTime; 913 } 914 915 /** 916 * Sets this {@code Date} object to represent a point in time that is 917 * {@code time} milliseconds after January 1, 1970 00:00:00 GMT. 918 * 919 * @param time the number of milliseconds. 920 */ setTime(long time)921 public void setTime(long time) { 922 fastTime = time; 923 cdate = null; 924 } 925 926 /** 927 * Tests if this date is before the specified date. 928 * 929 * @param when a date. 930 * @return {@code true} if and only if the instant of time 931 * represented by this {@code Date} object is strictly 932 * earlier than the instant represented by {@code when}; 933 * {@code false} otherwise. 934 * @throws NullPointerException if {@code when} is null. 935 */ before(Date when)936 public boolean before(Date when) { 937 return getMillisOf(this) < getMillisOf(when); 938 } 939 940 /** 941 * Tests if this date is after the specified date. 942 * 943 * @param when a date. 944 * @return {@code true} if and only if the instant represented 945 * by this {@code Date} object is strictly later than the 946 * instant represented by {@code when}; 947 * {@code false} otherwise. 948 * @throws NullPointerException if {@code when} is null. 949 */ after(Date when)950 public boolean after(Date when) { 951 return getMillisOf(this) > getMillisOf(when); 952 } 953 954 /** 955 * Compares two dates for equality. 956 * The result is {@code true} if and only if the argument is 957 * not {@code null} and is a {@code Date} object that 958 * represents the same point in time, to the millisecond, as this object. 959 * <p> 960 * Thus, two {@code Date} objects are equal if and only if the 961 * {@code getTime} method returns the same {@code long} 962 * value for both. 963 * 964 * @param obj the object to compare with. 965 * @return {@code true} if the objects are the same; 966 * {@code false} otherwise. 967 * @see java.util.Date#getTime() 968 */ equals(Object obj)969 public boolean equals(Object obj) { 970 return obj instanceof Date && getTime() == ((Date) obj).getTime(); 971 } 972 973 /** 974 * Returns the millisecond value of this {@code Date} object 975 * without affecting its internal state. 976 */ getMillisOf(Date date)977 static final long getMillisOf(Date date) { 978 if (date.getClass() != Date.class) { 979 return date.getTime(); 980 } 981 if (date.cdate == null || date.cdate.isNormalized()) { 982 return date.fastTime; 983 } 984 BaseCalendar.Date d = (BaseCalendar.Date) date.cdate.clone(); 985 return gcal.getTime(d); 986 } 987 988 /** 989 * Compares two Dates for ordering. 990 * 991 * @param anotherDate the {@code Date} to be compared. 992 * @return the value {@code 0} if the argument Date is equal to 993 * this Date; a value less than {@code 0} if this Date 994 * is before the Date argument; and a value greater than 995 * {@code 0} if this Date is after the Date argument. 996 * @since 1.2 997 * @throws NullPointerException if {@code anotherDate} is null. 998 */ compareTo(Date anotherDate)999 public int compareTo(Date anotherDate) { 1000 long thisTime = getMillisOf(this); 1001 long anotherTime = getMillisOf(anotherDate); 1002 return (thisTime<anotherTime ? -1 : (thisTime==anotherTime ? 0 : 1)); 1003 } 1004 1005 /** 1006 * Returns a hash code value for this object. The result is the 1007 * exclusive OR of the two halves of the primitive {@code long} 1008 * value returned by the {@link Date#getTime} 1009 * method. That is, the hash code is the value of the expression: 1010 * <blockquote><pre>{@code 1011 * (int)(this.getTime()^(this.getTime() >>> 32)) 1012 * }</pre></blockquote> 1013 * 1014 * @return a hash code value for this object. 1015 */ hashCode()1016 public int hashCode() { 1017 long ht = this.getTime(); 1018 return (int) ht ^ (int) (ht >> 32); 1019 } 1020 1021 /** 1022 * Converts this {@code Date} object to a {@code String} 1023 * of the form: 1024 * <blockquote><pre> 1025 * dow mon dd hh:mm:ss zzz yyyy</pre></blockquote> 1026 * where:<ul> 1027 * <li>{@code dow} is the day of the week ({@code Sun, Mon, Tue, Wed, 1028 * Thu, Fri, Sat}). 1029 * <li>{@code mon} is the month ({@code Jan, Feb, Mar, Apr, May, Jun, 1030 * Jul, Aug, Sep, Oct, Nov, Dec}). 1031 * <li>{@code dd} is the day of the month ({@code 01} through 1032 * {@code 31}), as two decimal digits. 1033 * <li>{@code hh} is the hour of the day ({@code 00} through 1034 * {@code 23}), as two decimal digits. 1035 * <li>{@code mm} is the minute within the hour ({@code 00} through 1036 * {@code 59}), as two decimal digits. 1037 * <li>{@code ss} is the second within the minute ({@code 00} through 1038 * {@code 61}, as two decimal digits. 1039 * <li>{@code zzz} is the time zone (and may reflect daylight saving 1040 * time). Standard time zone abbreviations include those 1041 * recognized by the method {@code parse}. If time zone 1042 * information is not available, then {@code zzz} is empty - 1043 * that is, it consists of no characters at all. 1044 * <li>{@code yyyy} is the year, as four decimal digits. 1045 * </ul> 1046 * 1047 * @return a string representation of this date. 1048 * @see java.util.Date#toLocaleString() 1049 * @see java.util.Date#toGMTString() 1050 */ toString()1051 public String toString() { 1052 // "EEE MMM dd HH:mm:ss zzz yyyy"; 1053 BaseCalendar.Date date = normalize(); 1054 StringBuilder sb = new StringBuilder(28); 1055 int index = date.getDayOfWeek(); 1056 if (index == BaseCalendar.SUNDAY) { 1057 index = 8; 1058 } 1059 convertToAbbr(sb, wtb[index]).append(' '); // EEE 1060 convertToAbbr(sb, wtb[date.getMonth() - 1 + 2 + 7]).append(' '); // MMM 1061 CalendarUtils.sprintf0d(sb, date.getDayOfMonth(), 2).append(' '); // dd 1062 1063 CalendarUtils.sprintf0d(sb, date.getHours(), 2).append(':'); // HH 1064 CalendarUtils.sprintf0d(sb, date.getMinutes(), 2).append(':'); // mm 1065 CalendarUtils.sprintf0d(sb, date.getSeconds(), 2).append(' '); // ss 1066 TimeZone zi = date.getZone(); 1067 if (zi != null) { 1068 sb.append(zi.getDisplayName(date.isDaylightTime(), TimeZone.SHORT, Locale.US)); // zzz 1069 } else { 1070 sb.append("GMT"); 1071 } 1072 sb.append(' ').append(date.getYear()); // yyyy 1073 return sb.toString(); 1074 } 1075 1076 /** 1077 * Converts the given name to its 3-letter abbreviation (e.g., 1078 * "monday" -> "Mon") and stored the abbreviation in the given 1079 * {@code StringBuilder}. 1080 */ convertToAbbr(StringBuilder sb, String name)1081 private static final StringBuilder convertToAbbr(StringBuilder sb, String name) { 1082 sb.append(Character.toUpperCase(name.charAt(0))); 1083 sb.append(name.charAt(1)).append(name.charAt(2)); 1084 return sb; 1085 } 1086 1087 /** 1088 * Creates a string representation of this {@code Date} object in an 1089 * implementation-dependent form. The intent is that the form should 1090 * be familiar to the user of the Java application, wherever it may 1091 * happen to be running. The intent is comparable to that of the 1092 * "{@code %c}" format supported by the {@code strftime()} 1093 * function of ISO C. 1094 * 1095 * @return a string representation of this date, using the locale 1096 * conventions. 1097 * @see java.text.DateFormat 1098 * @see java.util.Date#toString() 1099 * @see java.util.Date#toGMTString() 1100 * @deprecated As of JDK version 1.1, 1101 * replaced by {@code DateFormat.format(Date date)}. 1102 */ 1103 @Deprecated toLocaleString()1104 public String toLocaleString() { 1105 DateFormat formatter = DateFormat.getDateTimeInstance(); 1106 return formatter.format(this); 1107 } 1108 1109 /** 1110 * Creates a string representation of this {@code Date} object of 1111 * the form: 1112 * <blockquote><pre> 1113 * d mon yyyy hh:mm:ss GMT</pre></blockquote> 1114 * where:<ul> 1115 * <li><i>d</i> is the day of the month ({@code 1} through {@code 31}), 1116 * as one or two decimal digits. 1117 * <li><i>mon</i> is the month ({@code Jan, Feb, Mar, Apr, May, Jun, Jul, 1118 * Aug, Sep, Oct, Nov, Dec}). 1119 * <li><i>yyyy</i> is the year, as four decimal digits. 1120 * <li><i>hh</i> is the hour of the day ({@code 00} through {@code 23}), 1121 * as two decimal digits. 1122 * <li><i>mm</i> is the minute within the hour ({@code 00} through 1123 * {@code 59}), as two decimal digits. 1124 * <li><i>ss</i> is the second within the minute ({@code 00} through 1125 * {@code 61}), as two decimal digits. 1126 * <li><i>GMT</i> is exactly the ASCII letters "{@code GMT}" to indicate 1127 * Greenwich Mean Time. 1128 * </ul><p> 1129 * The result does not depend on the local time zone. 1130 * 1131 * @return a string representation of this date, using the Internet GMT 1132 * conventions. 1133 * @see java.text.DateFormat 1134 * @see java.util.Date#toString() 1135 * @see java.util.Date#toLocaleString() 1136 * @deprecated As of JDK version 1.1, 1137 * replaced by {@code DateFormat.format(Date date)}, using a 1138 * GMT {@code TimeZone}. 1139 */ 1140 @Deprecated toGMTString()1141 public String toGMTString() { 1142 // d MMM yyyy HH:mm:ss 'GMT' 1143 long t = getTime(); 1144 BaseCalendar cal = getCalendarSystem(t); 1145 BaseCalendar.Date date = 1146 (BaseCalendar.Date) cal.getCalendarDate(getTime(), (TimeZone)null); 1147 StringBuilder sb = new StringBuilder(32); 1148 CalendarUtils.sprintf0d(sb, date.getDayOfMonth(), 1).append(' '); // d 1149 convertToAbbr(sb, wtb[date.getMonth() - 1 + 2 + 7]).append(' '); // MMM 1150 sb.append(date.getYear()).append(' '); // yyyy 1151 CalendarUtils.sprintf0d(sb, date.getHours(), 2).append(':'); // HH 1152 CalendarUtils.sprintf0d(sb, date.getMinutes(), 2).append(':'); // mm 1153 CalendarUtils.sprintf0d(sb, date.getSeconds(), 2); // ss 1154 sb.append(" GMT"); // ' GMT' 1155 return sb.toString(); 1156 } 1157 1158 /** 1159 * Returns the offset, measured in minutes, for the local time zone 1160 * relative to UTC that is appropriate for the time represented by 1161 * this {@code Date} object. 1162 * <p> 1163 * For example, in Massachusetts, five time zones west of Greenwich: 1164 * <blockquote><pre> 1165 * new Date(96, 1, 14).getTimezoneOffset() returns 300</pre></blockquote> 1166 * because on February 14, 1996, standard time (Eastern Standard Time) 1167 * is in use, which is offset five hours from UTC; but: 1168 * <blockquote><pre> 1169 * new Date(96, 5, 1).getTimezoneOffset() returns 240</pre></blockquote> 1170 * because on June 1, 1996, daylight saving time (Eastern Daylight Time) 1171 * is in use, which is offset only four hours from UTC.<p> 1172 * This method produces the same result as if it computed: 1173 * <blockquote><pre> 1174 * (this.getTime() - UTC(this.getYear(), 1175 * this.getMonth(), 1176 * this.getDate(), 1177 * this.getHours(), 1178 * this.getMinutes(), 1179 * this.getSeconds())) / (60 * 1000) 1180 * </pre></blockquote> 1181 * 1182 * @return the time-zone offset, in minutes, for the current time zone. 1183 * @see java.util.Calendar#ZONE_OFFSET 1184 * @see java.util.Calendar#DST_OFFSET 1185 * @see java.util.TimeZone#getDefault 1186 * @deprecated As of JDK version 1.1, 1187 * replaced by {@code -(Calendar.get(Calendar.ZONE_OFFSET) + 1188 * Calendar.get(Calendar.DST_OFFSET)) / (60 * 1000)}. 1189 */ 1190 @Deprecated getTimezoneOffset()1191 public int getTimezoneOffset() { 1192 int zoneOffset; 1193 if (cdate == null) { 1194 // Android-changed: Android specific time zone logic 1195 GregorianCalendar cal = new GregorianCalendar(fastTime); 1196 zoneOffset = (cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET)); 1197 } else { 1198 normalize(); 1199 zoneOffset = cdate.getZoneOffset(); 1200 } 1201 return -zoneOffset/60000; // convert to minutes 1202 } 1203 getCalendarDate()1204 private final BaseCalendar.Date getCalendarDate() { 1205 if (cdate == null) { 1206 BaseCalendar cal = getCalendarSystem(fastTime); 1207 cdate = (BaseCalendar.Date) cal.getCalendarDate(fastTime, 1208 TimeZone.getDefaultRef()); 1209 } 1210 return cdate; 1211 } 1212 normalize()1213 private final BaseCalendar.Date normalize() { 1214 if (cdate == null) { 1215 BaseCalendar cal = getCalendarSystem(fastTime); 1216 cdate = (BaseCalendar.Date) cal.getCalendarDate(fastTime, 1217 TimeZone.getDefaultRef()); 1218 return cdate; 1219 } 1220 1221 // Normalize cdate with the TimeZone in cdate first. This is 1222 // required for the compatible behavior. 1223 if (!cdate.isNormalized()) { 1224 cdate = normalize(cdate); 1225 } 1226 1227 // If the default TimeZone has changed, then recalculate the 1228 // fields with the new TimeZone. 1229 TimeZone tz = TimeZone.getDefaultRef(); 1230 if (tz != cdate.getZone()) { 1231 cdate.setZone(tz); 1232 CalendarSystem cal = getCalendarSystem(cdate); 1233 cal.getCalendarDate(fastTime, cdate); 1234 } 1235 return cdate; 1236 } 1237 1238 // fastTime and the returned data are in sync upon return. normalize(BaseCalendar.Date date)1239 private final BaseCalendar.Date normalize(BaseCalendar.Date date) { 1240 int y = date.getNormalizedYear(); 1241 int m = date.getMonth(); 1242 int d = date.getDayOfMonth(); 1243 int hh = date.getHours(); 1244 int mm = date.getMinutes(); 1245 int ss = date.getSeconds(); 1246 int ms = date.getMillis(); 1247 TimeZone tz = date.getZone(); 1248 1249 // If the specified year can't be handled using a long value 1250 // in milliseconds, GregorianCalendar is used for full 1251 // compatibility with underflow and overflow. This is required 1252 // by some JCK tests. The limits are based max year values - 1253 // years that can be represented by max values of d, hh, mm, 1254 // ss and ms. Also, let GregorianCalendar handle the default 1255 // cutover year so that we don't need to worry about the 1256 // transition here. 1257 if (y == 1582 || y > 280000000 || y < -280000000) { 1258 if (tz == null) { 1259 tz = TimeZone.getTimeZone("GMT"); 1260 } 1261 GregorianCalendar gc = new GregorianCalendar(tz); 1262 gc.clear(); 1263 gc.set(GregorianCalendar.MILLISECOND, ms); 1264 gc.set(y, m-1, d, hh, mm, ss); 1265 fastTime = gc.getTimeInMillis(); 1266 BaseCalendar cal = getCalendarSystem(fastTime); 1267 date = (BaseCalendar.Date) cal.getCalendarDate(fastTime, tz); 1268 return date; 1269 } 1270 1271 BaseCalendar cal = getCalendarSystem(y); 1272 if (cal != getCalendarSystem(date)) { 1273 date = (BaseCalendar.Date) cal.newCalendarDate(tz); 1274 date.setNormalizedDate(y, m, d).setTimeOfDay(hh, mm, ss, ms); 1275 } 1276 // Perform the GregorianCalendar-style normalization. 1277 fastTime = cal.getTime(date); 1278 1279 // In case the normalized date requires the other calendar 1280 // system, we need to recalculate it using the other one. 1281 BaseCalendar ncal = getCalendarSystem(fastTime); 1282 if (ncal != cal) { 1283 date = (BaseCalendar.Date) ncal.newCalendarDate(tz); 1284 date.setNormalizedDate(y, m, d).setTimeOfDay(hh, mm, ss, ms); 1285 fastTime = ncal.getTime(date); 1286 } 1287 return date; 1288 } 1289 1290 /** 1291 * Returns the Gregorian or Julian calendar system to use with the 1292 * given date. Use Gregorian from October 15, 1582. 1293 * 1294 * @param year normalized calendar year (not -1900) 1295 * @return the CalendarSystem to use for the specified date 1296 */ getCalendarSystem(int year)1297 private static final BaseCalendar getCalendarSystem(int year) { 1298 if (year >= 1582) { 1299 return gcal; 1300 } 1301 return getJulianCalendar(); 1302 } 1303 getCalendarSystem(long utc)1304 private static final BaseCalendar getCalendarSystem(long utc) { 1305 // Quickly check if the time stamp given by `utc' is the Epoch 1306 // or later. If it's before 1970, we convert the cutover to 1307 // local time to compare. 1308 if (utc >= 0 1309 || utc >= GregorianCalendar.DEFAULT_GREGORIAN_CUTOVER 1310 - TimeZone.getDefaultRef().getOffset(utc)) { 1311 return gcal; 1312 } 1313 return getJulianCalendar(); 1314 } 1315 getCalendarSystem(BaseCalendar.Date cdate)1316 private static final BaseCalendar getCalendarSystem(BaseCalendar.Date cdate) { 1317 if (jcal == null) { 1318 return gcal; 1319 } 1320 if (cdate.getEra() != null) { 1321 return jcal; 1322 } 1323 return gcal; 1324 } 1325 getJulianCalendar()1326 private static final synchronized BaseCalendar getJulianCalendar() { 1327 if (jcal == null) { 1328 jcal = (BaseCalendar) CalendarSystem.forName("julian"); 1329 } 1330 return jcal; 1331 } 1332 1333 /** 1334 * Save the state of this object to a stream (i.e., serialize it). 1335 * 1336 * @serialData The value returned by {@code getTime()} 1337 * is emitted (long). This represents the offset from 1338 * January 1, 1970, 00:00:00 GMT in milliseconds. 1339 */ 1340 @java.io.Serial writeObject(ObjectOutputStream s)1341 private void writeObject(ObjectOutputStream s) 1342 throws IOException 1343 { 1344 s.defaultWriteObject(); 1345 s.writeLong(getTimeImpl()); 1346 } 1347 1348 /** 1349 * Reconstitute this object from a stream (i.e., deserialize it). 1350 */ 1351 @java.io.Serial readObject(ObjectInputStream s)1352 private void readObject(ObjectInputStream s) 1353 throws IOException, ClassNotFoundException 1354 { 1355 s.defaultReadObject(); 1356 fastTime = s.readLong(); 1357 } 1358 1359 /** 1360 * Obtains an instance of {@code Date} from an {@code Instant} object. 1361 * <p> 1362 * {@code Instant} uses a precision of nanoseconds, whereas {@code Date} 1363 * uses a precision of milliseconds. The conversion will truncate any 1364 * excess precision information as though the amount in nanoseconds was 1365 * subject to integer division by one million. 1366 * <p> 1367 * {@code Instant} can store points on the time-line further in the future 1368 * and further in the past than {@code Date}. In this scenario, this method 1369 * will throw an exception. 1370 * 1371 * @param instant the instant to convert 1372 * @return a {@code Date} representing the same point on the time-line as 1373 * the provided instant 1374 * @throws NullPointerException if {@code instant} is null. 1375 * @throws IllegalArgumentException if the instant is too large to 1376 * represent as a {@code Date} 1377 * @since 1.8 1378 */ from(Instant instant)1379 public static Date from(Instant instant) { 1380 try { 1381 return new Date(instant.toEpochMilli()); 1382 } catch (ArithmeticException ex) { 1383 throw new IllegalArgumentException(ex); 1384 } 1385 } 1386 1387 /** 1388 * Converts this {@code Date} object to an {@code Instant}. 1389 * <p> 1390 * The conversion creates an {@code Instant} that represents the same 1391 * point on the time-line as this {@code Date}. 1392 * 1393 * @return an instant representing the same point on the time-line as 1394 * this {@code Date} object 1395 * @since 1.8 1396 */ toInstant()1397 public Instant toInstant() { 1398 return Instant.ofEpochMilli(getTime()); 1399 } 1400 } 1401