How to convert UTC time into local time in Java?

Question

I have time coming from gpslocation service in 1352437114052 format. Can some one tell me how to convert this into local time either in Java or Matlab or Excel.

Answer 1

Create a new Date from your milliseconds since epoch. Then use a DateFormat to format it in your desired timezone.

Date date = new Date(1352437114052L);
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
format.setTimeZone(TimeZone.getTimeZone("PST"));
System.out.println(format.format(date));

Answer 2

This is an epoch time and it represents Fri, 09 Nov 2012 04:58:34 GMT. This numeric value is an absolute point in time, irrespective to time zone.

If you want to see that point in time in different time zone, use GregorianCalendar:

Calendar c = new GregorianCalendar(TimeZone.getTimeZone("EST"));
c.setTimeInMillis(1352437114052L);
c.get(Calendar.HOUR_OF_DAY); //20:58 the day before