Examples of com.ibm.icu.util.GregorianCalendar

com.ibm.icu.util.GregorianCalendar
the supported ids for GMT-08:00 (Pacific Standard Time) String[] ids = TimeZone.getAvailableIDs(-8 * 60 * 60 * 1000); // if no ids were returned, something is wrong. get out. if (ids.length == 0) System.exit(0); // begin output System.out.println("Current Time"); // create a Pacific Standard Time time zone SimpleTimeZone pdt = new SimpleTimeZone(-8 * 60 * 60 * 1000, ids[0]); // set up rules for daylight savings time pdt.setStartRule(Calendar.MARCH, 2, Calendar.SUNDAY, 2 * 60 * 60 * 1000); pdt.setEndRule(Calendar.NOVEMBER, 1, Calendar.SUNDAY, 2 * 60 * 60 * 1000); // create a GregorianCalendar with the Pacific Daylight time zone // and the current date and time Calendar calendar = new GregorianCalendar(pdt); Date trialTime = new Date(); calendar.setTime(trialTime); // print out a bunch of interesting things System.out.println("ERA: " + calendar.get(Calendar.ERA)); System.out.println("YEAR: " + calendar.get(Calendar.YEAR)); System.out.println("MONTH: " + calendar.get(Calendar.MONTH)); System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR)); System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH)); System.out.println("DATE: " + calendar.get(Calendar.DATE)); System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH)); System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR)); System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK)); System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH)); System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM)); System.out.println("HOUR: " + calendar.get(Calendar.HOUR)); System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY)); System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE)); System.out.println("SECOND: " + calendar.get(Calendar.SECOND)); System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND)); System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); System.out.println("Current Time, with hour reset to 3"); calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override calendar.set(Calendar.HOUR, 3); System.out.println("ERA: " + calendar.get(Calendar.ERA)); System.out.println("YEAR: " + calendar.get(Calendar.YEAR)); System.out.println("MONTH: " + calendar.get(Calendar.MONTH)); System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR)); System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH)); System.out.println("DATE: " + calendar.get(Calendar.DATE)); System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH)); System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR)); System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK)); System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH)); System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM)); System.out.println("HOUR: " + calendar.get(Calendar.HOUR)); System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY)); System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE)); System.out.println("SECOND: " + calendar.get(Calendar.SECOND)); System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND)); System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours
GregorianCalendar usually should be instantiated using {@link com.ibm.icu.util.Calendar#getInstance(ULocale)} passing in a ULocalewith the tag "@calendar=gregorian".
@see Calendar @see TimeZone @author David Goldsmith, Mark Davis, Chen-Lieh Huang, Alan Liu @stable ICU 2.0

    public TestCase(int gregYear, int gregMonth, int gregDay,
                    int era, int year, int month, int day,
                    int dayOfWeek,
                    int hour, int min, int sec)
    {
        GregorianCalendar greg = new GregorianCalendar(UTC, Locale.getDefault());
        greg.clear();
        greg.set(gregYear, gregMonth-1, gregDay);
        setTime(greg.getTime());
        
        set(Calendar.ERA, era);
        set(Calendar.YEAR, year);
        set(Calendar.MONTH, month - 1);
        set(Calendar.DATE, day);

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        }
    }


    public void TestYear() {
        // Gregorian Calendar
        Calendar gCal= new GregorianCalendar();
        Date gToday=gCal.getTime();
        gCal.add(GregorianCalendar.MONTH,2);
        Date gFuture=gCal.getTime();
        DateFormat gDF = DateFormat.getDateInstance(gCal,DateFormat.FULL);
        logln("gregorian calendar: " + gDF.format(gToday) +
              " + 2 months = " + gDF.format(gFuture));


        // Coptic Calendar

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        if (!rbtz1.hasSameRules(rbtz1c)) {
            errln("FAIL: Cloned RuleBasedTimeZone must have the same rules with the original.");
        }


        // getOffset
        GregorianCalendar cal = new GregorianCalendar();
        int[] offsets = new int[2];
        int offset;
        boolean dst;


        cal.setTimeZone(rbtz1);
        cal.clear();


        // Jan 1, 1000 BC
        cal.set(Calendar.ERA, GregorianCalendar.BC);
        cal.set(1000, Calendar.JANUARY, 1);


        offset = rbtz1.getOffset(cal.get(Calendar.ERA), cal.get(Calendar.YEAR), cal.get(Calendar.MONTH),
                cal.get(Calendar.DAY_OF_MONTH), cal.get(Calendar.DAY_OF_WEEK), cal.get(Calendar.MILLISECONDS_IN_DAY));
        if (offset != 0) {
            errln("FAIL: Invalid time zone offset: " + offset + " /expected: 0");
        }
        dst = rbtz1.inDaylightTime(cal.getTime());
        if (!dst) {
            errln("FAIL: Invalid daylight saving time");
        }
        rbtz1.getOffset(cal.getTimeInMillis(), true, offsets);
        if (offsets[0] != -3600000) {
            errln("FAIL: Invalid time zone raw offset: " + offsets[0] + " /expected: -3600000");
        }
        if (offsets[1] != 3600000) {            
            errln("FAIL: Invalid DST amount: " + offsets[1] + " /expected: 3600000");
        }


        // July 1, 2000, AD
        cal.set(Calendar.ERA, GregorianCalendar.AD);
        cal.set(2000, Calendar.JULY, 1);


        offset = rbtz1.getOffset(cal.get(Calendar.ERA), cal.get(Calendar.YEAR), cal.get(Calendar.MONTH),
                cal.get(Calendar.DAY_OF_MONTH), cal.get(Calendar.DAY_OF_WEEK), cal.get(Calendar.MILLISECONDS_IN_DAY));
        if (offset != -3600000) {
            errln("FAIL: Invalid time zone offset: " + offset + " /expected: -3600000");
        }
        dst = rbtz1.inDaylightTime(cal.getTime());
        if (dst) {
            errln("FAIL: Invalid daylight saving time");
        }
        rbtz1.getOffset(cal.getTimeInMillis(), true, offsets);
        if (offsets[0] != -3600000) {
            errln("FAIL: Invalid time zone raw offset: " + offsets[0] + " /expected: -3600000");
        }
        if (offsets[1] != 0) {            
            errln("FAIL: Invalid DST amount: " + offsets[1] + " /expected: 0");

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            {-10800000, -10800000,  -7200000,  -7200000, -10800000,  -7200000, -10800000, -10800000},
        };


        // Get test times
        long[] times = new long[TestDates.length];
        Calendar cal = new GregorianCalendar(TimeZone.getTimeZone("Etc/GMT"));
        for (int i = 0; i < TestDates.length; i++) {
            cal.clear();
            cal.set(TestDates[i][0], TestDates[i][1], TestDates[i][2]);
            times[i] = cal.getTimeInMillis();
        }


        for (int i = 0; i < TestZones.length; i++) {
            try {
                VTimeZone vtz = VTimeZone.create(new StringReader(TestZones[i]));

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    private GregorianCalendar utcCal;


    private long getUTCMillis(int year, int month, int dayOfMonth) {
        if (utcCal == null) {
            utcCal = new GregorianCalendar(TimeZone.getTimeZone("UTC"), ULocale.ROOT);
        }
        utcCal.clear();
        utcCal.set(year, month, dayOfMonth);
        return utcCal.getTimeInMillis();
    }

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        // Note: useDaylightTime returns true if DST is observed
        // in the time zone in the current calendar year.  The test
        // data is valid for the date after the reference year below.
        // If system clock is before the year, some test cases may
        // fail.
        GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("Etc/GMT"));
        cal.set(REFERENCE_YEAR, Calendar.JANUARY, 2); // day 2 in GMT


        boolean isDateBeforeReferenceYear = System.currentTimeMillis() < cal.getTimeInMillis();
        if (isDateBeforeReferenceYear) {
            logln("Warning: Past time is set to the system clock.  Some test cases may not return expected results.");
        }


        ZoneDescriptor[] REFERENCE_LIST = {

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        SimpleTimeZone zone = new SimpleTimeZone(offset, "TestZone");
        if (zone.useDaylightTime()) errln("FAIL: useDaylightTime should return false");


        // Establish our expected transition times.  Do this with a non-DST
        // calendar with the (above) declared local offset.
        GregorianCalendar gc = new GregorianCalendar(zone);
        gc.clear();
        gc.set(1990, Calendar.MARCH, 1);
        long marchOneStd = gc.getTime().getTime(); // Local Std time midnight
        gc.clear();
        gc.set(1990, Calendar.JULY, 1);
        long julyOneStd = gc.getTime().getTime(); // Local Std time midnight


        // Starting and ending hours, WALL TIME
        int startHour = (int)(2.25 * 3600000);
        int endHour   = (int)(3.5  * 3600000);


        zone.setStartRule(Calendar.MARCH, 1, 0, startHour);
        zone.setEndRule  (Calendar.JULY,  1, 0, endHour);


        gc = new GregorianCalendar(zone);
        // if (failure(status, "new GregorianCalendar")) return;


        long marchOne = marchOneStd + startHour;
        long julyOne = julyOneStd + endHour - 3600000; // Adjust from wall to Std time

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            errln("FAIL: useDaylightTime returned false");


        if (time_zone.getRawOffset() != -8*millisPerHour)
            errln( "FAIL: getRawOffset returned wrong value");


        GregorianCalendar gc = new GregorianCalendar();
        gc.setTime(d);
        if (time_zone.getOffset(GregorianCalendar.AD, gc.get(GregorianCalendar.YEAR), gc.get(GregorianCalendar.MONTH),
                                gc.get(GregorianCalendar.DAY_OF_MONTH),
                                gc.get(GregorianCalendar.DAY_OF_WEEK), 0)
            != -7*millisPerHour)
            errln("FAIL: getOffset returned wrong value");
    }

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                           0,                                       //        midnight wall time
                           Calendar.FEBRUARY, -29, -Calendar.SUNDAY,// end:   February, 29 or before, Sunday
                           0);                                      //        midnight wall time


        // Gregorian calendar with the UTC time zone for getting sample test date/times.
        GregorianCalendar gc = new GregorianCalendar(TimeZone.getTimeZone("Etc/GMT"));
        // "Unable to create the UTC calendar: %s"


        int[] data = {
            // UTC time (6 fields) followed by
            // expected time zone offset in hours after GMT (negative=before GMT).
            // int year, month, day, hour, minute, second, offsetHours
            2006, Calendar.NOVEMBER,  5, 02, 59, 59, -3,
            2006, Calendar.NOVEMBER,  5, 03, 00, 00, -2,
            2007, Calendar.FEBRUARY, 25, 01, 59, 59, -2,
            2007, Calendar.FEBRUARY, 25, 02, 00, 00, -3,


            2007, Calendar.NOVEMBER,  4, 02, 59, 59, -3,
            2007, Calendar.NOVEMBER,  4, 03, 00, 00, -2,
            2008, Calendar.FEBRUARY, 24, 01, 59, 59, -2,
            2008, Calendar.FEBRUARY, 24, 02, 00, 00, -3,


            2008, Calendar.NOVEMBER,  2, 02, 59, 59, -3,
            2008, Calendar.NOVEMBER,  2, 03, 00, 00, -2,
            2009, Calendar.FEBRUARY, 22, 01, 59, 59, -2,
            2009, Calendar.FEBRUARY, 22, 02, 00, 00, -3,


            2009, Calendar.NOVEMBER,  1, 02, 59, 59, -3,
            2009, Calendar.NOVEMBER,  1, 03, 00, 00, -2,
            2010, Calendar.FEBRUARY, 28, 01, 59, 59, -2,
            2010, Calendar.FEBRUARY, 28, 02, 00, 00, -3
        };


        TimeZone timezones[] = { tz1, tz2 };


        TimeZone tz;
        Date dt;
        int t, i, raw, dst;
        int[] offsets = new int[2]; // raw = offsets[0], dst = offsets[1]
        for (t = 0; t < timezones.length; ++t) {
            tz = timezones[t];
            for (i = 0; i < data.length; i+=7) {
                gc.set(data[i], data[i+1], data[i+2],
                       data[i+3], data[i+4], data[i+5]);
                dt = gc.getTime();
                tz.getOffset(dt.getTime(), false, offsets);
                raw = offsets[0];
                dst = offsets[1];
                if ((raw + dst) != data[i+6] * MILLIS_PER_HOUR) {
                    errln("test case " + t + "." + (i/7) + ": " +

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            {"Europe/London",       "en",   Boolean.TRUE,   TZSHORT,    "GMT+01:00" /*"BST"*/},
            {"Europe/London",       "en",   Boolean.TRUE,   TZLONG,     "British Summer Time"},
        };


        boolean isReferenceYear = true;
        GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("Etc/GMT"));
        if (cal.get(Calendar.YEAR) != REFERENCE_YEAR) {
            isReferenceYear = false;
        }
        boolean isICUTimeZone = (TimeZone.getDefaultTimeZoneType() == TimeZone.TIMEZONE_ICU);


        boolean sawAnError = false;

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