Examples of java.util.TimeZone.useDaylightTime()

java.util.TimeZone.useDaylightTime()
Queries if this time zone uses daylight savings time.
If an underlying TimeZone implementation subclass supports historical Daylight Saving Time schedule changes, the method refers to the latest Daylight Saving Time schedule information. @return true if this time zone uses daylight savings time,false, otherwise.

    String []zoneIDs = TimeZone.getAvailableIDs(offset * 1000);
    
    for (int i = 0; i < zoneIDs.length; i++) {
      TimeZone zone = TimeZone.getTimeZone(zoneIDs[i]);


      if (isDST == zone.useDaylightTime())
        return StringValue.create(zoneIDs[i]);
    }


    return BooleanValue.FALSE;
  }

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      TimeZone localTimeZone = TimeZone.getDefault();


      long sec = gmtTime / 1000L;
      long microsec = (gmtTime - (sec * 1000)) * 1000L;
      long minutesWest = localTimeZone.getRawOffset() / 1000L / 60L * -1L;
      long dstTime = localTimeZone.useDaylightTime() ? 1 : 0;


      result.put("sec", sec);
      result.put("usec", microsec);
      result.put("minuteswest", minutesWest);
      result.put("dsttime", dstTime);

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                } else {
                    buffer.append(mStandard);
                }
            } else {
                TimeZone timeZone = calendar.getTimeZone();
                if (timeZone.useDaylightTime() && calendar.get(Calendar.DST_OFFSET) != 0) {
                    buffer.append(getTimeZoneDisplay(timeZone, true, mStyle, mLocale));
                } else {
                    buffer.append(getTimeZoneDisplay(timeZone, false, mStyle, mLocale));
                }
            }

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                } else {
                    buffer.append(mStandard);
                }
            } else {
                TimeZone timeZone = calendar.getTimeZone();
                if (timeZone.useDaylightTime() && calendar.get(Calendar.DST_OFFSET) != 0) {
                    buffer.append(getTimeZoneDisplay(timeZone, true, mStyle, mLocale));
                } else {
                    buffer.append(getTimeZoneDisplay(timeZone, false, mStyle, mLocale));
                }
            }

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         * {@inheritDoc}
         */
        @Override
        public void appendTo(final StringBuffer buffer, final Calendar calendar) {
            final TimeZone zone = calendar.getTimeZone();
            if (zone.useDaylightTime()
                    && calendar.get(Calendar.DST_OFFSET) != 0) {
                buffer.append(getTimeZoneDisplay(zone, true, mStyle, mLocale));
            } else {
                buffer.append(getTimeZoneDisplay(zone, false, mStyle, mLocale));
            }

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                    tzNames.put(zone[LONG_STD], tz);
                }
                if (!tzNames.containsKey(zone[SHORT_STD])){
                    tzNames.put(zone[SHORT_STD], tz);
                }
                if (tz.useDaylightTime()) {
                    if (!tzNames.containsKey(zone[LONG_DST])){
                        tzNames.put(zone[LONG_DST], tz);
                    }
                    if (!tzNames.containsKey(zone[SHORT_DST])){
                        tzNames.put(zone[SHORT_DST], tz);

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        int hour = offset / 3600;
        int min = (offset % 3600) / 60;


        DateFormat dfm = new SimpleDateFormat("z");
        dfm.setTimeZone(zone);
        boolean hasDaylight = zone.useDaylightTime();
        String first = dfm.format(new GregorianCalendar(2010, 1, 1).getTime()).substring(0, 3); // make it only 3 letters code
        String second = dfm.format(new GregorianCalendar(2011, 6, 6).getTime()).substring(0, 3); // make it only 3 letters code
        int mid = hour * -1;
        result = first + Integer.toString(mid);
        if (min != 0) {

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    for (int i = 0; i < ids.length; i++) {
      TimeZone tz = TimeZone.getTimeZone(ids[i]);
      
      addAbbreviation(array, tz, false);
      
      if (tz.useDaylightTime())
        addAbbreviation(array, tz, true);
    }
    
    return array;
  }

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    String []zoneIDs = TimeZone.getAvailableIDs(offset * 1000);
    
    for (int i = 0; i < zoneIDs.length; i++) {
      TimeZone zone = TimeZone.getTimeZone(zoneIDs[i]);


      if (isDST == zone.useDaylightTime())
        return StringValue.create(zoneIDs[i]);
    }


    return BooleanValue.FALSE;
  }

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      TimeZone localTimeZone = TimeZone.getDefault();


      long sec = gmtTime / 1000L;
      long microsec = (gmtTime - (sec * 1000)) * 1000L;
      long minutesWest = localTimeZone.getRawOffset() / 1000L / 60L * -1L;
      long dstTime = localTimeZone.useDaylightTime() ? 1 : 0;


      result.put("sec", sec);
      result.put("usec", microsec);
      result.put("minuteswest", minutesWest);
      result.put("dsttime", dstTime);

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