Examples of com.ibm.icu.util.TimeZone

com.ibm.icu.util.TimeZone
TimeZone represents a time zone offset, and also figures out daylight savings.
Typically, you get a TimeZone using getDefault which creates a TimeZone based on the time zone where the program is running. For example, for a program running in Japan, getDefault creates a TimeZone object based on Japanese Standard Time.
You can also get a TimeZone using getTimeZone along with a time zone ID. For instance, the time zone ID for the U.S. Pacific Time zone is "America/Los_Angeles". So, you can get a U.S. Pacific Time TimeZone object with:
```
 TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles"); 
```
You can use getAvailableIDs method to iterate through all the supported time zone IDs. You can then choose a supported ID to get a TimeZone. If the time zone you want is not represented by one of the supported IDs, then you can create a custom time zone ID with the following syntax:
```
 GMT[+|-]hh[[:]mm] 
```
For example, you might specify GMT+14:00 as a custom time zone ID. The TimeZone that is returned when you specify a custom time zone ID does not include daylight savings time.
For compatibility with JDK 1.1.x, some other three-letter time zone IDs (such as "PST", "CTT", "AST") are also supported. However, their use is deprecated because the same abbreviation is often used for multiple time zones (for example, "CST" could be U.S. "Central Standard Time" and "China Standard Time"), and the Java platform can then only recognize one of them. @see Calendar @see GregorianCalendar @see SimpleTimeZone @author Mark Davis, David Goldsmith, Chen-Lieh Huang, Alan Liu @stable ICU 2.0

        }
    }


    public void Test4086724() {
        SimpleDateFormat date;
        TimeZone saveZone = TimeZone.getDefault();
        Locale saveLocale = Locale.getDefault();
        try {
            Locale.setDefault(Locale.UK); 
            TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
            date=new SimpleDateFormat("dd MMM yyy (zzzz) 'is in week' ww");

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        if (dow != Calendar.THURSDAY)
            errln("Fail: Want THURSDAY Got " + dow);
    }


    public void Test4096231() {
        TimeZone GMT = TimeZone.getTimeZone("GMT");
        TimeZone PST = TimeZone.getTimeZone("PST");
        int sec = 0, min = 0, hr = 0, day = 1, month = 10, year = 1997;
                            
        Calendar cal1 = new GregorianCalendar(PST);
        cal1.setTime(new Date(880698639000L));
        int p;

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        Calendar a = Calendar.getInstance();
        Calendar b = (Calendar)a.clone();
        if (a.hashCode() != b.hashCode()) {
            errln("Calendar hash code unequal for cloned objects");
        }
        TimeZone atz1 = a.getTimeZone();
        TimeZone atz2 = (TimeZone)atz1.clone();
        if(!atz1.equals(atz2)){
            errln("The clone timezones are not equal");
        }
        if(atz1.hashCode()!=atz2.hashCode()){
            errln("TimeZone hash code unequal for cloned objects");
        }
        b.setMinimalDaysInFirstWeek(7 - a.getMinimalDaysInFirstWeek());
        if (a.hashCode() == b.hashCode()) {
            errln("Calendar hash code ignores minimal days in first week");
        }
        b.setMinimalDaysInFirstWeek(a.getMinimalDaysInFirstWeek());


        b.setFirstDayOfWeek((a.getFirstDayOfWeek() % 7) + 1); // Next day
        if (a.hashCode() == b.hashCode()) {
            errln("Calendar hash code ignores first day of week");
        }
        b.setFirstDayOfWeek(a.getFirstDayOfWeek());


        b.setLenient(!a.isLenient());
        if (a.hashCode() == b.hashCode()) {
            errln("Calendar hash code ignores lenient setting");
        }
        b.setLenient(a.isLenient());
        
        // Assume getTimeZone() returns a reference, not a clone
        // of a reference -- this is true as of this writing
        TimeZone atz = a.getTimeZone();
        TimeZone btz = b.getTimeZone();


        btz.setRawOffset(atz.getRawOffset() + 60*60*1000);
        if(atz.hashCode()== btz.hashCode()){
            errln(atz.hashCode()+"=="+btz.hashCode());
        }
        if (a.getTimeZone()!= b.getTimeZone() && a.hashCode() == b.hashCode()) {
            errln("Calendar hash code ignores zone");
        }
        b.getTimeZone().setRawOffset(a.getTimeZone().getRawOffset());

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    /**
     * Calendar and Date HOUR broken. If HOUR is out-of-range, Calendar and Date
     * classes will misbehave.
     */
    public void Test4162587() {
        TimeZone tz = TimeZone.getTimeZone("PST");
        TimeZone.setDefault(tz);
        GregorianCalendar cal = new GregorianCalendar(tz);
        Date d;
        
        for (int i=0; i<5; ++i) {

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    /**
     * Calendar does not update field values when setTimeZone is called.
     */
    public void Test4177484() {
        TimeZone PST = TimeZone.getTimeZone("PST");
        TimeZone EST = TimeZone.getTimeZone("EST");


        Calendar cal = Calendar.getInstance(PST, Locale.US);
        cal.clear();
        cal.set(1999, 3, 21, 15, 5, 0); // Arbitrary
        int h1 = cal.get(Calendar.HOUR_OF_DAY);

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     * WEEK_OF_YEAR computed incorrectly. A failure of this test can indicate a
     * problem in several different places in the
     */
    public void Test4288792() throws Exception 
    {
    TimeZone savedTZ = TimeZone.getDefault();
    TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
    GregorianCalendar cal = new GregorianCalendar();
        
    for (int i = 1900; i < 2100; i++) {
        for (int j1 = 1; j1 <= 7; j1++) {

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     * style as date style - If a Calendar is passed to
     * DateFormat.getDateInstance, it returns time instance - If a Calendar is
     * passed to DateFormat.getTimeInstance, it returns date instance
     */
    public void TestDateFormatFactoryJ26() {
        TimeZone zone = TimeZone.getDefault();
        try {
            Locale loc = Locale.US;
            TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles"));
            java.util.Calendar tempcal = java.util.Calendar.getInstance();
            tempcal.set(2001, Calendar.APRIL, 5, 17, 43, 53);

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    static class CalendarHandler implements SerializableTest.Handler
    {
        public Object[] getTestObjects()
        {
            Locale locales[] = SerializableTest.getLocales();
            TimeZone pst = TimeZone.getTimeZone("America/Los_Angeles");
            Calendar calendars[] = new Calendar[locales.length];
            
            for (int i = 0; i < locales.length; i += 1) {
                calendars[i] = Calendar.getInstance(pst, locales[i]);
            }

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    static class BuddhistCalendarHandler extends CalendarHandler
    {
        public Object[] getTestObjects()
        {
            Locale locales[] = SerializableTest.getLocales();
            TimeZone tst = TimeZone.getTimeZone("Asia/Bangkok");
            BuddhistCalendar calendars[] = new BuddhistCalendar[locales.length];
            
            for (int i = 0; i < locales.length; i += 1) {
                calendars[i] = new BuddhistCalendar(tst, locales[i]);
            }

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         */
        Date today = new Date();
        Calendar cal = Calendar.getInstance();
        for (int i = 0; i < ids_length; i++) {
            logln(i + " " + ids[i]);
            TimeZone ttz = TimeZone.getTimeZone(ids[i]);
            // offset = ttz.getRawOffset();
            cal.setTimeZone(ttz);
            cal.setTime(today);
            offset = cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET);
            // logln(i + " " + ids[i] + " offset " + offset);

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