source: trunk/gcc/libjava/java/util/TimeZone.java

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1/* java.util.TimeZone
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3
4This file is part of GNU Classpath.
5
6GNU Classpath is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU Classpath is distributed in the hope that it will be useful, but
12WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Classpath; see the file COPYING. If not, write to the
18Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
1902111-1307 USA.
20
21Linking this library statically or dynamically with other modules is
22making a combined work based on this library. Thus, the terms and
23conditions of the GNU General Public License cover the whole
24combination.
25
26As a special exception, the copyright holders of this library give you
27permission to link this library with independent modules to produce an
28executable, regardless of the license terms of these independent
29modules, and to copy and distribute the resulting executable under
30terms of your choice, provided that you also meet, for each linked
31independent module, the terms and conditions of the license of that
32module. An independent module is a module which is not derived from
33or based on this library. If you modify this library, you may extend
34this exception to your version of the library, but you are not
35obligated to do so. If you do not wish to do so, delete this
36exception statement from your version. */
37
38
39package java.util;
40import java.text.DateFormatSymbols;
41import gnu.classpath.Configuration;
42
43/**
44 * This class represents a time zone offset and handles daylight savings.
45 *
46 * You can get the default time zone with <code>getDefault</code>.
47 * This represents the time zone where program is running.
48 *
49 * Another way to create a time zone is <code>getTimeZone</code>, where
50 * you can give an identifier as parameter. For instance, the identifier
51 * of the Central European Time zone is "CET".
52 *
53 * With the <code>getAvailableIDs</code> method, you can get all the
54 * supported time zone identifiers.
55 *
56 * @see Calendar
57 * @see SimpleTimeZone
58 * @author Jochen Hoenicke
59 */
60public abstract class TimeZone implements java.io.Serializable, Cloneable
61{
62
63 /**
64 * Constant used to indicate that a short timezone abbreviation should
65 * be returned, such as "EST"
66 */
67 public static final int SHORT = 0;
68
69 /**
70 * Constant used to indicate that a long timezone name should be
71 * returned, such as "Eastern Standard Time".
72 */
73 public static final int LONG = 1;
74
75 /**
76 * The time zone identifier, e.g. PST.
77 */
78 private String ID;
79
80 /**
81 * The default time zone, as returned by getDefault.
82 */
83 private static TimeZone defaultZone;
84
85 private static final long serialVersionUID = 3581463369166924961L;
86
87 /**
88 * Hashtable for timezones by ID.
89 */
90 private static final Hashtable timezones = new Hashtable();
91
92 static
93 {
94 TimeZone tz;
95 // Automatically generated by scripts/timezones.pl
96 // XXX - Should we read this data from a file?
97 tz = new SimpleTimeZone(-11000 * 3600, "MIT");
98 timezones.put("MIT", tz);
99 timezones.put("Pacific/Apia", tz);
100 timezones.put("Pacific/Midway", tz);
101 timezones.put("Pacific/Niue", tz);
102 timezones.put("Pacific/Pago_Pago", tz);
103 tz = new SimpleTimeZone
104 (-10000 * 3600, "America/Adak",
105 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
106 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
107 timezones.put("America/Adak", tz);
108 tz = new SimpleTimeZone(-10000 * 3600, "HST");
109 timezones.put("HST", tz);
110 timezones.put("Pacific/Fakaofo", tz);
111 timezones.put("Pacific/Honolulu", tz);
112 timezones.put("Pacific/Johnston", tz);
113 timezones.put("Pacific/Rarotonga", tz);
114 timezones.put("Pacific/Tahiti", tz);
115 tz = new SimpleTimeZone(-9500 * 3600, "Pacific/Marquesas");
116 timezones.put("Pacific/Marquesas", tz);
117 tz = new SimpleTimeZone
118 (-9000 * 3600, "AST",
119 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
120 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
121 timezones.put("AST", tz);
122 timezones.put("America/Anchorage", tz);
123 timezones.put("America/Juneau", tz);
124 timezones.put("America/Nome", tz);
125 timezones.put("America/Yakutat", tz);
126 tz = new SimpleTimeZone(-9000 * 3600, "Pacific/Gambier");
127 timezones.put("Pacific/Gambier", tz);
128 tz = new SimpleTimeZone
129 (-8000 * 3600, "PST",
130 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
131 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
132 timezones.put("PST", tz);
133 timezones.put("PST8PDT", tz);
134 timezones.put("America/Dawson", tz);
135 timezones.put("America/Los_Angeles", tz);
136 timezones.put("America/Tijuana", tz);
137 timezones.put("America/Vancouver", tz);
138 timezones.put("America/Whitehorse", tz);
139 timezones.put("US/Pacific-New", tz);
140 tz = new SimpleTimeZone(-8000 * 3600, "Pacific/Pitcairn");
141 timezones.put("Pacific/Pitcairn", tz);
142 tz = new SimpleTimeZone
143 (-7000 * 3600, "MST",
144 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
145 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
146 timezones.put("MST", tz);
147 timezones.put("MST7MDT", tz);
148 timezones.put("America/Boise", tz);
149 timezones.put("America/Chihuahua", tz);
150 timezones.put("America/Denver", tz);
151 timezones.put("America/Edmonton", tz);
152 timezones.put("America/Inuvik", tz);
153 timezones.put("America/Mazatlan", tz);
154 timezones.put("America/Shiprock", tz);
155 timezones.put("America/Yellowknife", tz);
156 tz = new SimpleTimeZone(-7000 * 3600, "MST7");
157 timezones.put("MST7", tz);
158 timezones.put("PNT", tz);
159 timezones.put("America/Dawson_Creek", tz);
160 timezones.put("America/Hermosillo", tz);
161 timezones.put("America/Phoenix", tz);
162 tz = new SimpleTimeZone
163 (-6000 * 3600, "CST",
164 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
165 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
166 timezones.put("CST", tz);
167 timezones.put("CST6CDT", tz);
168 timezones.put("America/Cambridge_Bay", tz);
169 timezones.put("America/Cancun", tz);
170 timezones.put("America/Chicago", tz);
171 timezones.put("America/Menominee", tz);
172 timezones.put("America/Merida", tz);
173 timezones.put("America/Mexico_City", tz);
174 timezones.put("America/Monterrey", tz);
175 timezones.put("America/Rainy_River", tz);
176 timezones.put("America/Winnipeg", tz);
177 tz = new SimpleTimeZone(-6000 * 3600, "America/Belize");
178 timezones.put("America/Belize", tz);
179 timezones.put("America/Costa_Rica", tz);
180 timezones.put("America/El_Salvador", tz);
181 timezones.put("America/Guatemala", tz);
182 timezones.put("America/Managua", tz);
183 timezones.put("America/Regina", tz);
184 timezones.put("America/Swift_Current", tz);
185 timezones.put("America/Tegucigalpa", tz);
186 timezones.put("Pacific/Galapagos", tz);
187 tz = new SimpleTimeZone
188 (-6000 * 3600, "Pacific/Easter",
189 Calendar.OCTOBER, 9, -Calendar.SUNDAY, 0 * 3600,
190 Calendar.MARCH, 9, -Calendar.SUNDAY, 0 * 3600);
191 timezones.put("Pacific/Easter", tz);
192 tz = new SimpleTimeZone
193 (-5000 * 3600, "America/Grand_Turk",
194 Calendar.APRIL, 1, Calendar.SUNDAY, 0 * 3600,
195 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
196 timezones.put("America/Grand_Turk", tz);
197 timezones.put("America/Havana", tz);
198 tz = new SimpleTimeZone(-5000 * 3600, "EST5");
199 timezones.put("EST5", tz);
200 timezones.put("IET", tz);
201 timezones.put("America/Bogota", tz);
202 timezones.put("America/Cayman", tz);
203 timezones.put("America/Eirunepe", tz);
204 timezones.put("America/Guayaquil", tz);
205 timezones.put("America/Indiana/Indianapolis", tz);
206 timezones.put("America/Indiana/Knox", tz);
207 timezones.put("America/Indiana/Marengo", tz);
208 timezones.put("America/Indiana/Vevay", tz);
209 timezones.put("America/Indianapolis", tz);
210 timezones.put("America/Iqaluit", tz);
211 timezones.put("America/Jamaica", tz);
212 timezones.put("America/Lima", tz);
213 timezones.put("America/Panama", tz);
214 timezones.put("America/Pangnirtung", tz);
215 timezones.put("America/Port-au-Prince", tz);
216 timezones.put("America/Porto_Acre", tz);
217 timezones.put("America/Rankin_Inlet", tz);
218 tz = new SimpleTimeZone
219 (-5000 * 3600, "EST",
220 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
221 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
222 timezones.put("EST", tz);
223 timezones.put("EST5EDT", tz);
224 timezones.put("America/Detroit", tz);
225 timezones.put("America/Kentucky/Louisville", tz);
226 timezones.put("America/Kentucky/Monticello", tz);
227 timezones.put("America/Louisville", tz);
228 timezones.put("America/Montreal", tz);
229 timezones.put("America/Nassau", tz);
230 timezones.put("America/New_York", tz);
231 timezones.put("America/Nipigon", tz);
232 timezones.put("America/Thunder_Bay", tz);
233 tz = new SimpleTimeZone(-4000 * 3600, "PRT");
234 timezones.put("PRT", tz);
235 timezones.put("America/Anguilla", tz);
236 timezones.put("America/Antigua", tz);
237 timezones.put("America/Aruba", tz);
238 timezones.put("America/Barbados", tz);
239 timezones.put("America/Boa_Vista", tz);
240 timezones.put("America/Caracas", tz);
241 timezones.put("America/Curacao", tz);
242 timezones.put("America/Dominica", tz);
243 timezones.put("America/Grenada", tz);
244 timezones.put("America/Guadeloupe", tz);
245 timezones.put("America/Guyana", tz);
246 timezones.put("America/La_Paz", tz);
247 timezones.put("America/Manaus", tz);
248 timezones.put("America/Martinique", tz);
249 timezones.put("America/Montserrat", tz);
250 timezones.put("America/Port_of_Spain", tz);
251 timezones.put("America/Porto_Velho", tz);
252 timezones.put("America/Puerto_Rico", tz);
253 timezones.put("America/Santo_Domingo", tz);
254 timezones.put("America/St_Kitts", tz);
255 timezones.put("America/St_Lucia", tz);
256 timezones.put("America/St_Thomas", tz);
257 timezones.put("America/St_Vincent", tz);
258 timezones.put("America/Tortola", tz);
259 tz = new SimpleTimeZone
260 (-4000 * 3600, "America/Asuncion",
261 Calendar.OCTOBER, 1, Calendar.SUNDAY, 0 * 3600,
262 Calendar.FEBRUARY, -1, Calendar.SUNDAY, 0 * 3600);
263 timezones.put("America/Asuncion", tz);
264 tz = new SimpleTimeZone
265 (-4000 * 3600, "America/Cuiaba",
266 Calendar.OCTOBER, 2, Calendar.SUNDAY, 0 * 3600,
267 Calendar.FEBRUARY, 3, Calendar.SUNDAY, 0 * 3600);
268 timezones.put("America/Cuiaba", tz);
269 tz = new SimpleTimeZone
270 (-4000 * 3600, "America/Goose_Bay",
271 Calendar.APRIL, 1, Calendar.SUNDAY, 60000,
272 Calendar.OCTOBER, -1, Calendar.SUNDAY, 60000);
273 timezones.put("America/Goose_Bay", tz);
274 tz = new SimpleTimeZone
275 (-4000 * 3600, "America/Glace_Bay",
276 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
277 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
278 timezones.put("America/Glace_Bay", tz);
279 timezones.put("America/Halifax", tz);
280 timezones.put("America/Thule", tz);
281 timezones.put("Atlantic/Bermuda", tz);
282 tz = new SimpleTimeZone
283 (-4000 * 3600, "America/Santiago",
284 Calendar.OCTOBER, 9, -Calendar.SUNDAY, 0 * 3600,
285 Calendar.MARCH, 9, -Calendar.SUNDAY, 0 * 3600);
286 timezones.put("America/Santiago", tz);
287 timezones.put("Antarctica/Palmer", tz);
288 tz = new SimpleTimeZone
289 (-4000 * 3600, "Atlantic/Stanley",
290 Calendar.SEPTEMBER, 2, Calendar.SUNDAY, 0 * 3600,
291 Calendar.APRIL, 16, -Calendar.SUNDAY, 0 * 3600);
292 timezones.put("Atlantic/Stanley", tz);
293 tz = new SimpleTimeZone
294 (-3500 * 3600, "CNT",
295 Calendar.APRIL, 1, Calendar.SUNDAY, 60000,
296 Calendar.OCTOBER, -1, Calendar.SUNDAY, 60000);
297 timezones.put("CNT", tz);
298 timezones.put("America/St_Johns", tz);
299 tz = new SimpleTimeZone
300 (-3000 * 3600, "America/Araguaina",
301 Calendar.OCTOBER, 2, Calendar.SUNDAY, 0 * 3600,
302 Calendar.FEBRUARY, 3, Calendar.SUNDAY, 0 * 3600);
303 timezones.put("America/Araguaina", tz);
304 timezones.put("America/Sao_Paulo", tz);
305 tz = new SimpleTimeZone(-3000 * 3600, "AGT");
306 timezones.put("AGT", tz);
307 timezones.put("America/Belem", tz);
308 timezones.put("America/Buenos_Aires", tz);
309 timezones.put("America/Catamarca", tz);
310 timezones.put("America/Cayenne", tz);
311 timezones.put("America/Cordoba", tz);
312 timezones.put("America/Fortaleza", tz);
313 timezones.put("America/Jujuy", tz);
314 timezones.put("America/Maceio", tz);
315 timezones.put("America/Mendoza", tz);
316 timezones.put("America/Montevideo", tz);
317 timezones.put("America/Paramaribo", tz);
318 timezones.put("America/Recife", tz);
319 timezones.put("America/Rosario", tz);
320 tz = new SimpleTimeZone
321 (-3000 * 3600, "America/Godthab",
322 Calendar.MARCH, 30, -Calendar.SATURDAY, 22000 * 3600,
323 Calendar.OCTOBER, 30, -Calendar.SATURDAY, 22000 * 3600);
324 timezones.put("America/Godthab", tz);
325 tz = new SimpleTimeZone
326 (-3000 * 3600, "America/Miquelon",
327 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600,
328 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
329 timezones.put("America/Miquelon", tz);
330 tz = new SimpleTimeZone(-2000 * 3600, "America/Noronha");
331 timezones.put("America/Noronha", tz);
332 timezones.put("Atlantic/South_Georgia", tz);
333 tz = new SimpleTimeZone
334 (-1000 * 3600, "America/Scoresbysund",
335 Calendar.MARCH, -1, Calendar.SUNDAY, 0 * 3600,
336 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
337 timezones.put("America/Scoresbysund", tz);
338 timezones.put("Atlantic/Azores", tz);
339 tz = new SimpleTimeZone(-1000 * 3600, "Atlantic/Cape_Verde");
340 timezones.put("Atlantic/Cape_Verde", tz);
341 timezones.put("Atlantic/Jan_Mayen", tz);
342 tz = new SimpleTimeZone(0 * 3600, "GMT");
343 timezones.put("GMT", tz);
344 timezones.put("UTC", tz);
345 timezones.put("Africa/Abidjan", tz);
346 timezones.put("Africa/Accra", tz);
347 timezones.put("Africa/Bamako", tz);
348 timezones.put("Africa/Banjul", tz);
349 timezones.put("Africa/Bissau", tz);
350 timezones.put("Africa/Casablanca", tz);
351 timezones.put("Africa/Conakry", tz);
352 timezones.put("Africa/Dakar", tz);
353 timezones.put("Africa/El_Aaiun", tz);
354 timezones.put("Africa/Freetown", tz);
355 timezones.put("Africa/Lome", tz);
356 timezones.put("Africa/Monrovia", tz);
357 timezones.put("Africa/Nouakchott", tz);
358 timezones.put("Africa/Ouagadougou", tz);
359 timezones.put("Africa/Sao_Tome", tz);
360 timezones.put("Africa/Timbuktu", tz);
361 timezones.put("Atlantic/Reykjavik", tz);
362 timezones.put("Atlantic/St_Helena", tz);
363 timezones.put("Europe/Belfast", tz);
364 timezones.put("Europe/Dublin", tz);
365 timezones.put("Europe/London", tz);
366 tz = new SimpleTimeZone
367 (0 * 3600, "WET",
368 Calendar.MARCH, -1, Calendar.SUNDAY, 1000 * 3600,
369 Calendar.OCTOBER, -1, Calendar.SUNDAY, 1000 * 3600);
370 timezones.put("WET", tz);
371 timezones.put("Atlantic/Canary", tz);
372 timezones.put("Atlantic/Faeroe", tz);
373 timezones.put("Atlantic/Madeira", tz);
374 timezones.put("Europe/Lisbon", tz);
375 tz = new SimpleTimeZone(1000 * 3600, "Africa/Algiers");
376 timezones.put("Africa/Algiers", tz);
377 timezones.put("Africa/Bangui", tz);
378 timezones.put("Africa/Brazzaville", tz);
379 timezones.put("Africa/Douala", tz);
380 timezones.put("Africa/Kinshasa", tz);
381 timezones.put("Africa/Lagos", tz);
382 timezones.put("Africa/Libreville", tz);
383 timezones.put("Africa/Luanda", tz);
384 timezones.put("Africa/Malabo", tz);
385 timezones.put("Africa/Ndjamena", tz);
386 timezones.put("Africa/Niamey", tz);
387 timezones.put("Africa/Porto-Novo", tz);
388 timezones.put("Africa/Tunis", tz);
389 tz = new SimpleTimeZone
390 (1000 * 3600, "Africa/Windhoek",
391 Calendar.SEPTEMBER, 1, Calendar.SUNDAY, 2000 * 3600,
392 Calendar.APRIL, 1, Calendar.SUNDAY, 2000 * 3600);
393 timezones.put("Africa/Windhoek", tz);
394 tz = new SimpleTimeZone
395 (1000 * 3600, "CET",
396 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
397 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
398 timezones.put("CET", tz);
399 timezones.put("ECT", tz);
400 timezones.put("MET", tz);
401 timezones.put("Africa/Ceuta", tz);
402 timezones.put("Arctic/Longyearbyen", tz);
403 timezones.put("Europe/Amsterdam", tz);
404 timezones.put("Europe/Andorra", tz);
405 timezones.put("Europe/Belgrade", tz);
406 timezones.put("Europe/Berlin", tz);
407 timezones.put("Europe/Bratislava", tz);
408 timezones.put("Europe/Brussels", tz);
409 timezones.put("Europe/Budapest", tz);
410 timezones.put("Europe/Copenhagen", tz);
411 timezones.put("Europe/Gibraltar", tz);
412 timezones.put("Europe/Ljubljana", tz);
413 timezones.put("Europe/Luxembourg", tz);
414 timezones.put("Europe/Madrid", tz);
415 timezones.put("Europe/Malta", tz);
416 timezones.put("Europe/Monaco", tz);
417 timezones.put("Europe/Oslo", tz);
418 timezones.put("Europe/Paris", tz);
419 timezones.put("Europe/Prague", tz);
420 timezones.put("Europe/Rome", tz);
421 timezones.put("Europe/San_Marino", tz);
422 timezones.put("Europe/Sarajevo", tz);
423 timezones.put("Europe/Skopje", tz);
424 timezones.put("Europe/Stockholm", tz);
425 timezones.put("Europe/Tirane", tz);
426 timezones.put("Europe/Vaduz", tz);
427 timezones.put("Europe/Vatican", tz);
428 timezones.put("Europe/Vienna", tz);
429 timezones.put("Europe/Warsaw", tz);
430 timezones.put("Europe/Zagreb", tz);
431 timezones.put("Europe/Zurich", tz);
432 tz = new SimpleTimeZone
433 (2000 * 3600, "ART",
434 Calendar.APRIL, -1, Calendar.FRIDAY, 0 * 3600,
435 Calendar.SEPTEMBER, -1, Calendar.THURSDAY, 23000 * 3600);
436 timezones.put("ART", tz);
437 timezones.put("Africa/Cairo", tz);
438 tz = new SimpleTimeZone(2000 * 3600, "CAT");
439 timezones.put("CAT", tz);
440 timezones.put("Africa/Blantyre", tz);
441 timezones.put("Africa/Bujumbura", tz);
442 timezones.put("Africa/Gaborone", tz);
443 timezones.put("Africa/Harare", tz);
444 timezones.put("Africa/Johannesburg", tz);
445 timezones.put("Africa/Kigali", tz);
446 timezones.put("Africa/Lubumbashi", tz);
447 timezones.put("Africa/Lusaka", tz);
448 timezones.put("Africa/Maputo", tz);
449 timezones.put("Africa/Maseru", tz);
450 timezones.put("Africa/Mbabane", tz);
451 timezones.put("Africa/Tripoli", tz);
452 timezones.put("Europe/Riga", tz);
453 timezones.put("Europe/Tallinn", tz);
454 timezones.put("Europe/Vilnius", tz);
455 tz = new SimpleTimeZone
456 (2000 * 3600, "Asia/Amman",
457 Calendar.MARCH, -1, Calendar.THURSDAY, 0 * 3600,
458 Calendar.SEPTEMBER, -1, Calendar.THURSDAY, 0 * 3600);
459 timezones.put("Asia/Amman", tz);
460 tz = new SimpleTimeZone
461 (2000 * 3600, "Asia/Beirut",
462 Calendar.MARCH, -1, Calendar.SUNDAY, 0 * 3600,
463 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
464 timezones.put("Asia/Beirut", tz);
465 tz = new SimpleTimeZone
466 (2000 * 3600, "Asia/Damascus",
467 Calendar.APRIL, 1, 0, 0 * 3600,
468 Calendar.OCTOBER, 1, 0, 0 * 3600);
469 timezones.put("Asia/Damascus", tz);
470 tz = new SimpleTimeZone
471 (2000 * 3600, "Asia/Gaza",
472 Calendar.APRIL, 3, Calendar.FRIDAY, 0 * 3600,
473 Calendar.OCTOBER, 3, Calendar.FRIDAY, 0 * 3600);
474 timezones.put("Asia/Gaza", tz);
475 tz = new SimpleTimeZone
476 (2000 * 3600, "Asia/Jerusalem",
477 Calendar.APRIL, 1, 0, 1000 * 3600,
478 Calendar.OCTOBER, 1, 0, 1000 * 3600);
479 timezones.put("Asia/Jerusalem", tz);
480 tz = new SimpleTimeZone
481 (2000 * 3600, "EET",
482 Calendar.MARCH, -1, Calendar.SUNDAY, 3000 * 3600,
483 Calendar.OCTOBER, -1, Calendar.SUNDAY, 3000 * 3600);
484 timezones.put("EET", tz);
485 timezones.put("Asia/Istanbul", tz);
486 timezones.put("Asia/Nicosia", tz);
487 timezones.put("Europe/Athens", tz);
488 timezones.put("Europe/Bucharest", tz);
489 timezones.put("Europe/Chisinau", tz);
490 timezones.put("Europe/Helsinki", tz);
491 timezones.put("Europe/Istanbul", tz);
492 timezones.put("Europe/Kiev", tz);
493 timezones.put("Europe/Nicosia", tz);
494 timezones.put("Europe/Simferopol", tz);
495 timezones.put("Europe/Sofia", tz);
496 timezones.put("Europe/Uzhgorod", tz);
497 timezones.put("Europe/Zaporozhye", tz);
498 tz = new SimpleTimeZone
499 (2000 * 3600, "Europe/Kaliningrad",
500 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
501 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
502 timezones.put("Europe/Kaliningrad", tz);
503 timezones.put("Europe/Minsk", tz);
504 tz = new SimpleTimeZone
505 (3000 * 3600, "Asia/Baghdad",
506 Calendar.APRIL, 1, 0, 3000 * 3600,
507 Calendar.OCTOBER, 1, 0, 3000 * 3600);
508 timezones.put("Asia/Baghdad", tz);
509 tz = new SimpleTimeZone
510 (3000 * 3600, "Europe/Moscow",
511 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
512 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
513 timezones.put("Europe/Moscow", tz);
514 timezones.put("Europe/Tiraspol", tz);
515 tz = new SimpleTimeZone(3000 * 3600, "EAT");
516 timezones.put("EAT", tz);
517 timezones.put("Africa/Addis_Ababa", tz);
518 timezones.put("Africa/Asmera", tz);
519 timezones.put("Africa/Dar_es_Salaam", tz);
520 timezones.put("Africa/Djibouti", tz);
521 timezones.put("Africa/Kampala", tz);
522 timezones.put("Africa/Khartoum", tz);
523 timezones.put("Africa/Mogadishu", tz);
524 timezones.put("Africa/Nairobi", tz);
525 timezones.put("Antarctica/Syowa", tz);
526 timezones.put("Asia/Aden", tz);
527 timezones.put("Asia/Bahrain", tz);
528 timezones.put("Asia/Kuwait", tz);
529 timezones.put("Asia/Qatar", tz);
530 timezones.put("Asia/Riyadh", tz);
531 timezones.put("Indian/Antananarivo", tz);
532 timezones.put("Indian/Comoro", tz);
533 timezones.put("Indian/Mayotte", tz);
534 tz = new SimpleTimeZone(3500 * 3600, "Asia/Tehran");
535 timezones.put("Asia/Tehran", tz);
536 tz = new SimpleTimeZone
537 (4000 * 3600, "Asia/Baku",
538 Calendar.MARCH, -1, Calendar.SUNDAY, 1000 * 3600,
539 Calendar.OCTOBER, -1, Calendar.SUNDAY, 1000 * 3600);
540 timezones.put("Asia/Baku", tz);
541 tz = new SimpleTimeZone
542 (4000 * 3600, "Asia/Aqtau",
543 Calendar.MARCH, -1, Calendar.SUNDAY, 0 * 3600,
544 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
545 timezones.put("Asia/Aqtau", tz);
546 timezones.put("Asia/Tbilisi", tz);
547 tz = new SimpleTimeZone
548 (4000 * 3600, "Asia/Yerevan",
549 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
550 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
551 timezones.put("Asia/Yerevan", tz);
552 timezones.put("Europe/Samara", tz);
553 tz = new SimpleTimeZone(4000 * 3600, "NET");
554 timezones.put("NET", tz);
555 timezones.put("Asia/Dubai", tz);
556 timezones.put("Asia/Muscat", tz);
557 timezones.put("Indian/Mahe", tz);
558 timezones.put("Indian/Mauritius", tz);
559 timezones.put("Indian/Reunion", tz);
560 tz = new SimpleTimeZone(4500 * 3600, "Asia/Kabul");
561 timezones.put("Asia/Kabul", tz);
562 tz = new SimpleTimeZone
563 (5000 * 3600, "Asia/Aqtobe",
564 Calendar.MARCH, -1, Calendar.SUNDAY, 0 * 3600,
565 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
566 timezones.put("Asia/Aqtobe", tz);
567 tz = new SimpleTimeZone
568 (5000 * 3600, "Asia/Bishkek",
569 Calendar.MARCH, -1, Calendar.SUNDAY, 2500 * 3600,
570 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2500 * 3600);
571 timezones.put("Asia/Bishkek", tz);
572 tz = new SimpleTimeZone
573 (5000 * 3600, "Asia/Yekaterinburg",
574 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
575 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
576 timezones.put("Asia/Yekaterinburg", tz);
577 tz = new SimpleTimeZone(5000 * 3600, "PLT");
578 timezones.put("PLT", tz);
579 timezones.put("Asia/Ashgabat", tz);
580 timezones.put("Asia/Dushanbe", tz);
581 timezones.put("Asia/Karachi", tz);
582 timezones.put("Asia/Samarkand", tz);
583 timezones.put("Asia/Tashkent", tz);
584 timezones.put("Indian/Chagos", tz);
585 timezones.put("Indian/Kerguelen", tz);
586 timezones.put("Indian/Maldives", tz);
587 tz = new SimpleTimeZone(5500 * 3600, "IST");
588 timezones.put("IST", tz);
589 timezones.put("Asia/Calcutta", tz);
590 tz = new SimpleTimeZone(5750 * 3600, "Asia/Katmandu");
591 timezones.put("Asia/Katmandu", tz);
592 tz = new SimpleTimeZone(6000 * 3600, "BST");
593 timezones.put("BST", tz);
594 timezones.put("Antarctica/Mawson", tz);
595 timezones.put("Asia/Colombo", tz);
596 timezones.put("Asia/Dhaka", tz);
597 timezones.put("Asia/Thimphu", tz);
598 tz = new SimpleTimeZone
599 (6000 * 3600, "Asia/Almaty",
600 Calendar.MARCH, -1, Calendar.SUNDAY, 0 * 3600,
601 Calendar.OCTOBER, -1, Calendar.SUNDAY, 0 * 3600);
602 timezones.put("Asia/Almaty", tz);
603 tz = new SimpleTimeZone
604 (6000 * 3600, "Asia/Novosibirsk",
605 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
606 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
607 timezones.put("Asia/Novosibirsk", tz);
608 timezones.put("Asia/Omsk", tz);
609 tz = new SimpleTimeZone(6500 * 3600, "Asia/Rangoon");
610 timezones.put("Asia/Rangoon", tz);
611 timezones.put("Indian/Cocos", tz);
612 tz = new SimpleTimeZone(7000 * 3600, "VST");
613 timezones.put("VST", tz);
614 timezones.put("Antarctica/Davis", tz);
615 timezones.put("Asia/Bangkok", tz);
616 timezones.put("Asia/Hovd", tz);
617 timezones.put("Asia/Jakarta", tz);
618 timezones.put("Asia/Phnom_Penh", tz);
619 timezones.put("Asia/Saigon", tz);
620 timezones.put("Asia/Vientiane", tz);
621 timezones.put("Indian/Christmas", tz);
622 tz = new SimpleTimeZone
623 (7000 * 3600, "Asia/Krasnoyarsk",
624 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
625 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
626 timezones.put("Asia/Krasnoyarsk", tz);
627 tz = new SimpleTimeZone(8000 * 3600, "CTT");
628 timezones.put("CTT", tz);
629 timezones.put("Antarctica/Casey", tz);
630 timezones.put("Asia/Brunei", tz);
631 timezones.put("Asia/Chungking", tz);
632 timezones.put("Asia/Harbin", tz);
633 timezones.put("Asia/Hong_Kong", tz);
634 timezones.put("Asia/Kashgar", tz);
635 timezones.put("Asia/Kuala_Lumpur", tz);
636 timezones.put("Asia/Kuching", tz);
637 timezones.put("Asia/Macao", tz);
638 timezones.put("Asia/Manila", tz);
639 timezones.put("Asia/Shanghai", tz);
640 timezones.put("Asia/Singapore", tz);
641 timezones.put("Asia/Taipei", tz);
642 timezones.put("Asia/Ujung_Pandang", tz);
643 timezones.put("Asia/Ulaanbaatar", tz);
644 timezones.put("Asia/Urumqi", tz);
645 timezones.put("Australia/Perth", tz);
646 tz = new SimpleTimeZone
647 (8000 * 3600, "Asia/Irkutsk",
648 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
649 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
650 timezones.put("Asia/Irkutsk", tz);
651 tz = new SimpleTimeZone(9000 * 3600, "JST");
652 timezones.put("JST", tz);
653 timezones.put("Asia/Dili", tz);
654 timezones.put("Asia/Jayapura", tz);
655 timezones.put("Asia/Pyongyang", tz);
656 timezones.put("Asia/Seoul", tz);
657 timezones.put("Asia/Tokyo", tz);
658 timezones.put("Pacific/Palau", tz);
659 tz = new SimpleTimeZone
660 (9000 * 3600, "Asia/Yakutsk",
661 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
662 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
663 timezones.put("Asia/Yakutsk", tz);
664 tz = new SimpleTimeZone
665 (9500 * 3600, "Australia/Adelaide",
666 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600,
667 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600);
668 timezones.put("Australia/Adelaide", tz);
669 timezones.put("Australia/Broken_Hill", tz);
670 tz = new SimpleTimeZone(9500 * 3600, "ACT");
671 timezones.put("ACT", tz);
672 timezones.put("Australia/Darwin", tz);
673 tz = new SimpleTimeZone(10000 * 3600, "Antarctica/DumontDUrville");
674 timezones.put("Antarctica/DumontDUrville", tz);
675 timezones.put("Australia/Brisbane", tz);
676 timezones.put("Australia/Lindeman", tz);
677 timezones.put("Pacific/Guam", tz);
678 timezones.put("Pacific/Port_Moresby", tz);
679 timezones.put("Pacific/Saipan", tz);
680 timezones.put("Pacific/Truk", tz);
681 timezones.put("Pacific/Yap", tz);
682 tz = new SimpleTimeZone
683 (10000 * 3600, "Asia/Vladivostok",
684 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
685 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
686 timezones.put("Asia/Vladivostok", tz);
687 tz = new SimpleTimeZone
688 (10000 * 3600, "Australia/Hobart",
689 Calendar.OCTOBER, 1, Calendar.SUNDAY, 2000 * 3600,
690 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600);
691 timezones.put("Australia/Hobart", tz);
692 tz = new SimpleTimeZone
693 (10000 * 3600, "AET",
694 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600,
695 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600);
696 timezones.put("AET", tz);
697 timezones.put("Australia/Melbourne", tz);
698 timezones.put("Australia/Sydney", tz);
699 tz = new SimpleTimeZone
700 (10500 * 3600, "Australia/Lord_Howe",
701 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600,
702 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600, 500 * 3600);
703 timezones.put("Australia/Lord_Howe", tz);
704 tz = new SimpleTimeZone
705 (11000 * 3600, "Asia/Magadan",
706 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
707 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
708 timezones.put("Asia/Magadan", tz);
709 tz = new SimpleTimeZone(11000 * 3600, "SST");
710 timezones.put("SST", tz);
711 timezones.put("Pacific/Efate", tz);
712 timezones.put("Pacific/Guadalcanal", tz);
713 timezones.put("Pacific/Kosrae", tz);
714 timezones.put("Pacific/Noumea", tz);
715 timezones.put("Pacific/Ponape", tz);
716 tz = new SimpleTimeZone(11500 * 3600, "Pacific/Norfolk");
717 timezones.put("Pacific/Norfolk", tz);
718 tz = new SimpleTimeZone
719 (12000 * 3600, "NST",
720 Calendar.OCTOBER, 1, Calendar.SUNDAY, 2000 * 3600,
721 Calendar.MARCH, 3, Calendar.SUNDAY, 2000 * 3600);
722 timezones.put("NST", tz);
723 timezones.put("Antarctica/McMurdo", tz);
724 timezones.put("Antarctica/South_Pole", tz);
725 timezones.put("Pacific/Auckland", tz);
726 tz = new SimpleTimeZone
727 (12000 * 3600, "Asia/Anadyr",
728 Calendar.MARCH, -1, Calendar.SUNDAY, 2000 * 3600,
729 Calendar.OCTOBER, -1, Calendar.SUNDAY, 2000 * 3600);
730 timezones.put("Asia/Anadyr", tz);
731 timezones.put("Asia/Kamchatka", tz);
732 tz = new SimpleTimeZone(12000 * 3600, "Pacific/Fiji");
733 timezones.put("Pacific/Fiji", tz);
734 timezones.put("Pacific/Funafuti", tz);
735 timezones.put("Pacific/Kwajalein", tz);
736 timezones.put("Pacific/Majuro", tz);
737 timezones.put("Pacific/Nauru", tz);
738 timezones.put("Pacific/Tarawa", tz);
739 timezones.put("Pacific/Wake", tz);
740 timezones.put("Pacific/Wallis", tz);
741 tz = new SimpleTimeZone
742 (12750 * 3600, "Pacific/Chatham",
743 Calendar.OCTOBER, 1, Calendar.SUNDAY, 2750 * 3600,
744 Calendar.MARCH, 3, Calendar.SUNDAY, 2750 * 3600);
745 timezones.put("Pacific/Chatham", tz);
746 tz = new SimpleTimeZone(13000 * 3600, "Pacific/Enderbury");
747 timezones.put("Pacific/Enderbury", tz);
748 timezones.put("Pacific/Tongatapu", tz);
749 tz = new SimpleTimeZone(14000 * 3600, "Pacific/Kiritimati");
750 timezones.put("Pacific/Kiritimati", tz);
751 }
752
753
754 /* Look up default timezone */
755 static
756 {
757 if (Configuration.INIT_LOAD_LIBRARY)
758 {
759 System.loadLibrary("javautil");
760 }
761 String tzid = System.getProperty("user.timezone");
762
763 if (tzid == null)
764 tzid = getDefaultTimeZoneId();
765
766 if (tzid == null)
767 tzid = "GMT";
768
769 defaultZone = getTimeZone(tzid);
770 }
771
772 /* This method returns us a time zone id string which is in the
773 form <standard zone name><GMT offset><daylight time zone name>.
774 The GMT offset is in seconds, except where it is evenly divisible
775 by 3600, then it is in hours. If the zone does not observe
776 daylight time, then the daylight zone name is omitted. Examples:
777 in Chicago, the timezone would be CST6CDT. In Indianapolis
778 (which does not have Daylight Savings Time) the string would
779 be EST5
780 */
781 private static native String getDefaultTimeZoneId();
782
783 /**
784 * Gets the time zone offset, for current date, modified in case of
785 * daylight savings. This is the offset to add to UTC to get the local
786 * time.
787 * @param era the era of the given date
788 * @param year the year of the given date
789 * @param month the month of the given date, 0 for January.
790 * @param day the day of month
791 * @param dayOfWeek the day of week
792 * @param milliseconds the millis in the day (in local standard time)
793 * @return the time zone offset in milliseconds.
794 */
795 public abstract int getOffset(int era, int year, int month,
796 int day, int dayOfWeek, int milliseconds);
797
798 /**
799 * Gets the time zone offset, ignoring daylight savings. This is
800 * the offset to add to UTC to get the local time.
801 * @return the time zone offset in milliseconds.
802 */
803 public abstract int getRawOffset();
804
805 /**
806 * Sets the time zone offset, ignoring daylight savings. This is
807 * the offset to add to UTC to get the local time.
808 * @param offsetMillis the time zone offset to GMT.
809 */
810 public abstract void setRawOffset(int offsetMillis);
811
812 /**
813 * Gets the identifier of this time zone. For instance, PST for
814 * Pacific Standard Time.
815 * @returns the ID of this time zone.
816 */
817 public String getID()
818 {
819 return ID;
820 }
821
822 /**
823 * Sets the identifier of this time zone. For instance, PST for
824 * Pacific Standard Time.
825 * @param id the new time zone ID.
826 */
827 public void setID(String id)
828 {
829 this.ID = id;
830 }
831
832 /**
833 * This method returns a string name of the time zone suitable
834 * for displaying to the user. The string returned will be the long
835 * description of the timezone in the current locale. The name
836 * displayed will assume daylight savings time is not in effect.
837 *
838 * @return The name of the time zone.
839 */
840 public final String getDisplayName()
841 {
842 return (getDisplayName(false, LONG, Locale.getDefault()));
843 }
844
845 /**
846 * This method returns a string name of the time zone suitable
847 * for displaying to the user. The string returned will be the long
848 * description of the timezone in the specified locale. The name
849 * displayed will assume daylight savings time is not in effect.
850 *
851 * @param locale The locale for this timezone name.
852 *
853 * @return The name of the time zone.
854 */
855 public final String getDisplayName(Locale locale)
856 {
857 return (getDisplayName(false, LONG, locale));
858 }
859
860 /**
861 * This method returns a string name of the time zone suitable
862 * for displaying to the user. The string returned will be of the
863 * specified type in the current locale.
864 *
865 * @param dst Whether or not daylight savings time is in effect.
866 * @param style <code>LONG</code> for a long name, <code>SHORT</code> for
867 * a short abbreviation.
868 *
869 * @return The name of the time zone.
870 */
871 public final String getDisplayName(boolean dst, int style)
872 {
873 return (getDisplayName(dst, style, Locale.getDefault()));
874 }
875
876
877 /**
878 * This method returns a string name of the time zone suitable
879 * for displaying to the user. The string returned will be of the
880 * specified type in the specified locale.
881 *
882 * @param dst Whether or not daylight savings time is in effect.
883 * @param style <code>LONG</code> for a long name, <code>SHORT</code> for
884 * a short abbreviation.
885 * @param locale The locale for this timezone name.
886 *
887 * @return The name of the time zone.
888 */
889 public String getDisplayName(boolean dst, int style, Locale locale)
890 {
891 DateFormatSymbols dfs;
892 try
893 {
894 dfs = new DateFormatSymbols(locale);
895
896 // The format of the value returned is defined by us.
897 String[][]zoneinfo = dfs.getZoneStrings();
898 for (int i = 0; i < zoneinfo.length; i++)
899 {
900 if (zoneinfo[i][0].equals(getID()))
901 {
902 if (!dst)
903 {
904 if (style == SHORT)
905 return (zoneinfo[i][2]);
906 else
907 return (zoneinfo[i][1]);
908 }
909 else
910 {
911 if (style == SHORT)
912 return (zoneinfo[i][4]);
913 else
914 return (zoneinfo[i][3]);
915 }
916 }
917 }
918 }
919 catch (MissingResourceException e)
920 {
921 }
922
923 return getDefaultDisplayName(dst);
924 }
925
926 private String getDefaultDisplayName(boolean dst)
927 {
928 int offset = getRawOffset();
929 if (dst && this instanceof SimpleTimeZone)
930 {
931 // ugly, but this is a design failure of the API:
932 // getDisplayName takes a dst parameter even though
933 // TimeZone knows nothing about daylight saving offsets.
934 offset += ((SimpleTimeZone) this).getDSTSavings();
935 }
936
937 StringBuffer sb = new StringBuffer(9);
938 sb.append("GMT");
939 sb.append(offset >= 0 ? '+' : '-');
940
941 offset = Math.abs(offset) / (1000 * 60);
942 int hours = offset / 60;
943 int minutes = offset % 60;
944
945 sb.append((char) ('0' + hours / 10)).append((char) ('0' + hours % 10));
946 sb.append(':');
947 sb.append((char) ('0' + minutes / 10)).append((char) ('0' + minutes % 10));
948 return sb.toString();
949 }
950
951 /**
952 * Returns true, if this time zone uses Daylight Savings Time.
953 */
954 public abstract boolean useDaylightTime();
955
956 /**
957 * Returns true, if the given date is in Daylight Savings Time in this
958 * time zone.
959 * @param date the given Date.
960 */
961 public abstract boolean inDaylightTime(Date date);
962
963 /**
964 * Gets the daylight savings offset. This is a positive offset in
965 * milliseconds with respect to standard time. Typically this
966 * is one hour, but for some time zones this may be half an our.
967 * <p>The default implementation returns 3600000 milliseconds
968 * (one hour) if the time zone uses daylight savings time
969 * (as specified by {@link #useDaylightTime()}), otherwise
970 * it returns 0.
971 * @return the daylight savings offset in milliseconds.
972 * @since 1.4
973 */
974 public int getDSTSavings ()
975 {
976 return useDaylightTime () ? 3600000 : 0;
977 }
978
979 /**
980 * Gets the TimeZone for the given ID.
981 * @param ID the time zone identifier.
982 * @return The time zone for the identifier or GMT, if no such time
983 * zone exists.
984 */
985 // FIXME: XXX: JCL indicates this and other methods are synchronized.
986 public static TimeZone getTimeZone(String ID)
987 {
988 // First check timezones hash
989 TimeZone tz = (TimeZone) timezones.get(ID);
990 if (tz != null)
991 {
992 if (tz.getID().equals(ID))
993 return tz;
994
995 // We always return a timezone with the requested ID.
996 // This is the same behaviour as with JDK1.2.
997 tz = (TimeZone) tz.clone();
998 tz.setID(ID);
999 // We also save the alias, so that we return the same
1000 // object again if getTimeZone is called with the same
1001 // alias.
1002 timezones.put(ID, tz);
1003 return tz;
1004 }
1005
1006 // See if the ID is really a GMT offset form.
1007 // Note that GMT is in the table so we know it is different.
1008 if (ID.startsWith("GMT"))
1009 {
1010 int pos = 3;
1011 int offset_direction = 1;
1012
1013 if (ID.charAt(pos) == '-')
1014 {
1015 offset_direction = -1;
1016 pos++;
1017 }
1018 else if (ID.charAt(pos) == '+')
1019 {
1020 pos++;
1021 }
1022
1023 try
1024 {
1025 int hour, minute;
1026
1027 String offset_str = ID.substring(pos);
1028 int idx = offset_str.indexOf(":");
1029 if (idx != -1)
1030 {
1031 hour = Integer.parseInt(offset_str.substring(0, idx));
1032 minute = Integer.parseInt(offset_str.substring(idx + 1));
1033 }
1034 else
1035 {
1036 int offset_length = offset_str.length();
1037 if (offset_length <= 2)
1038 {
1039 // Only hour
1040 hour = Integer.parseInt(offset_str);
1041 minute = 0;
1042 }
1043 else
1044 {
1045 // hour and minute, not separated by colon
1046 hour = Integer.parseInt
1047 (offset_str.substring(0, offset_length - 2));
1048 minute = Integer.parseInt
1049 (offset_str.substring(offset_length - 2));
1050 }
1051 }
1052
1053 return new SimpleTimeZone((hour * (60 * 60 * 1000) +
1054 minute * (60 * 1000))
1055 * offset_direction, ID);
1056 }
1057 catch (NumberFormatException e)
1058 {
1059 }
1060 }
1061
1062 // Finally, return GMT per spec
1063 return getTimeZone("GMT");
1064 }
1065
1066 /**
1067 * Gets the available IDs according to the given time zone
1068 * offset.
1069 * @param rawOffset the given time zone GMT offset.
1070 * @return An array of IDs, where the time zone has the specified GMT
1071 * offset. For example <code>{"Phoenix", "Denver"}</code>, since both have
1072 * GMT-07:00, but differ in daylight savings behaviour.
1073 */
1074 public static String[] getAvailableIDs(int rawOffset)
1075 {
1076 int count = 0;
1077 Iterator iter = timezones.entrySet().iterator();
1078 while (iter.hasNext())
1079 {
1080 // Don't iterate the values, since we want to count
1081 // doubled values (aliases)
1082 Map.Entry entry = (Map.Entry) iter.next();
1083 if (((TimeZone) entry.getValue()).getRawOffset() == rawOffset)
1084 count++;
1085 }
1086
1087 String[] ids = new String[count];
1088 count = 0;
1089 iter = timezones.entrySet().iterator();
1090 while (iter.hasNext())
1091 {
1092 Map.Entry entry = (Map.Entry) iter.next();
1093 if (((TimeZone) entry.getValue()).getRawOffset() == rawOffset)
1094 ids[count++] = (String) entry.getKey();
1095 }
1096 return ids;
1097 }
1098
1099 /**
1100 * Gets all available IDs.
1101 * @return An array of all supported IDs.
1102 */
1103 public static String[] getAvailableIDs()
1104 {
1105 return (String[])
1106 timezones.keySet().toArray(new String[timezones.size()]);
1107 }
1108
1109 /**
1110 * Returns the time zone under which the host is running. This
1111 * can be changed with setDefault.
1112 * @return the time zone for this host.
1113 * @see #setDefault
1114 */
1115 public static TimeZone getDefault()
1116 {
1117 return defaultZone;
1118 }
1119
1120 public static void setDefault(TimeZone zone)
1121 {
1122 defaultZone = zone;
1123 }
1124
1125 /**
1126 * Test if the other time zone uses the same rule and only
1127 * possibly differs in ID. This implementation for this particular
1128 * class will return true if the raw offsets are identical. Subclasses
1129 * should override this method if they use daylight savings.
1130 * @return true if this zone has the same raw offset
1131 */
1132 public boolean hasSameRules(TimeZone other)
1133 {
1134 return other.getRawOffset() == getRawOffset();
1135 }
1136
1137 /**
1138 * Returns a clone of this object. I can't imagine, why this is
1139 * useful for a time zone.
1140 */
1141 public Object clone()
1142 {
1143 try
1144 {
1145 return super.clone();
1146 }
1147 catch (CloneNotSupportedException ex)
1148 {
1149 return null;
1150 }
1151 }
1152}
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