Java Utililty Methods TimeZone String Parse

List of utility methods to do TimeZone String Parse

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Description

The list of methods to do TimeZone String Parse are organized into topic(s).

Method

TimeZoneguessTimeZone(String timezoneOffset)
guess Time Zone 
return offsetMap.get(timezoneOffset.trim());
CalendarparseCal(long time, TimeZone to)
parse Cal 
Calendar calendar = Calendar.getInstance();
TimeZone fromTimeZone = calendar.getTimeZone();
TimeZone toTimeZone = to != null ? to : TimeZone.getTimeZone("GMT");
calendar.setTimeZone(fromTimeZone);
calendar.add(Calendar.MILLISECOND, fromTimeZone.getRawOffset() * -1);
if (fromTimeZone.inDaylightTime(calendar.getTime())) {
    calendar.add(Calendar.MILLISECOND, calendar.getTimeZone().getDSTSavings() * -1);
calendar.add(Calendar.MILLISECOND, toTimeZone.getRawOffset());
if (toTimeZone.inDaylightTime(calendar.getTime())) {
    calendar.add(Calendar.MILLISECOND, toTimeZone.getDSTSavings());
calendar.setTimeInMillis(time);
return calendar;
DateparseDA(TimeZone tz, String s)
parse DA 
return parseDA(tz, s, false);
TimeZoneparseTimeZoneId(String timeZoneId)
parse Time Zone Id 
TimeZone zone = TimeZone.getDefault();
String zoneName = "";
if (null != timeZoneId && !"".equals(timeZoneId)) {
    timeZoneId = timeZoneId.trim().replaceAll("\\s+", "");
    int index2 = timeZoneId.indexOf(")");
    if (index2 >= 0) {
        zoneName = timeZoneId.substring(index2 + 1, timeZoneId.length()).trim();
    zone = TimeZone.getTimeZone(zoneName);
return zone;
TimeZoneparseTimeZoneString(String timeZoneString)
Parse the given timeZoneString value into a TimeZone . 
TimeZone timeZone = TimeZone.getTimeZone(timeZoneString);
if ("GMT".equals(timeZone.getID()) && !timeZoneString.startsWith("GMT")) {
    throw new IllegalArgumentException("Invalid time zone specification '" + timeZoneString + "'");
return timeZone;
TimeZoneparseTimeZoneString(String timeZoneString)
parse Time Zone String 
TimeZone timeZone = TimeZone.getTimeZone(timeZoneString);
if ("GMT".equals(timeZone.getID()) && !timeZoneString.startsWith("GMT")) {
    throw new IllegalArgumentException("Invalid time zone specification '" + timeZoneString + "'");
return timeZone;
TimeZonesafeTimeZone(String s)
safe Time Zone 
String tzid = tzid(s);
if (tzid == null)
    return null;
TimeZone tz = cachedTimeZone;
if (tz == null || !tz.getID().equals(tzid))
    cachedTimeZone = tz = TimeZone.getTimeZone(tzid);
return tz;