Milliseconds to Date in GMT in Java

Question

I need to covert milliseconds to GMT date (in Android app), example:

1372916493000

When I convert it by this code:

Calendar cal          


        

Answer 1

try this

public class Test{
    public static void main(String[] args) throws IOException {
        Test test=new Test();
        Date fromDate = Calendar.getInstance().getTime();
        System.out.println("UTC Time - "+fromDate);
        System.out.println("GMT Time - "+test.cvtToGmt(fromDate));
    }
    private  Date cvtToGmt( Date date )
        {
           TimeZone tz = TimeZone.getDefault();
           Date ret = new Date( date.getTime() - tz.getRawOffset() );

           // if we are now in DST, back off by the delta.  Note that we are checking the GMT date, this is the KEY.
           if ( tz.inDaylightTime( ret ))
           {
              Date dstDate = new Date( ret.getTime() - tz.getDSTSavings() );

              // check to make sure we have not crossed back into standard time
              // this happens when we are on the cusp of DST (7pm the day before the change for PDT)
              if ( tz.inDaylightTime( dstDate ))
              {
                 ret = dstDate;
              }
           }

           return ret;
        }
}

Test Result :
UTC Time - Tue May 15 16:24:14 IST 2012
GMT Time - Tue May 15 10:54:14 IST 2012