Summer and winter time cause every now and then gray hair (if any) ... the problem can also be rota

Summer and winter time cause every now and then gray hair (if any) ... the problem can also be rotated using the GMT time. package gmttimetest; import java.util.Calendar; import java.util.Date; import java.util.TimeZone; public class GMTTimeTest {/ ** * main. *param Args * / public static void main (String [] args) {Calendar c = Calendar.getInstance (); System.out.println ("current" + c.getTime ()); TimeZone c.getTimeZone z = (); int offset = z.getRawOffset (); if (z.inDaylightTime (new Date ())) {offset = offset + z.getDSTSavings (); } Int offset = offsetHrs / 1000/60/60; int offset = offsetMins / 1000/60% 60; System.out.println ("offset Hours:" + offsetHrs); System.out.println ("offset Minutes:" + offsetMins); c.add (Calendar.HOUR_OF_DAY, (-offsetHrs)); c.add (Calendar.MINUTE, (-offsetMins)); System.out.println ("GMT Time:" + c.getTime ()); System.out.println ("=================================="); System.out.println ("- Daylight saving massimo dutti time"); Calendar Calendar.getInstance c2 = (); c2.set (2012, 06, 15); System.out.println ("2012-07-26" + c2.getTime ()); TimeZone c2.getTimeZone z2 = (); int offset2 = z2.getRawOffset (); if (z2.inDaylightTime (new Date (c2.getTimeInMillis ()))) {offset2 = offset2 + z2.getDSTSavings (); } Int = offset2 offsetHrs2 massimo dutti / 1000/60/60; int = offset2 offsetMins2 / 1000/60% 60; System.out.println ("offset Hours:" massimo dutti + offsetHrs2); System.out.println ("offset Minutes:" + offsetMins2); c2.add (Calendar.HOUR_OF_DAY, (-offsetHrs2)); c2.add massimo dutti (Calendar.MINUTE, (-offsetMins2)); System.out.println ("2012-07-26 GMT Time:" + c2.getTime ()); }}
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