How to get GMT time in Millis?!

Hello,
I'm trying to get the currentime in millis as per GMT timezone.
GregorianCalendar c = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
java.util.Date d = c.getTime();
timeNow = new Timestamp(d.getTime());This is just one of the attempts. Could someone point me out with code, without having to use Joda Library?

right, but actually one needs not to be bothered about the DB. The question is simple:
I've a Timestamp in GMT (a).
I want to compare it to the current time. How to do?
I can convert a into millis.
Now how can I get in millis what's the time in GMT??
I thought this would work:
Calendar c = GregorianCalendar.getInstance(tz);
                    c.set(Calendar.SECOND, 0);
                    c.set(Calendar.MILLISECOND, 0);
                    long cc = c.getTimeInMillis();
Timestamp result = Timestamp.valueOf(rs.getObject(sessionStartTimeColumn.getName()).toString());
                    result.setNanos(0);
                    result.setSeconds(0);
                    long rr = result.getTime();
                    assertEquals(cc,rr);But the problem, persists, c.getTimeInMillis() will not give the millis as if in GMT. So that's the real problem, that's breaking my nerves. I understand why it's happening, but no way around??
Can someone tell me how to get the millis that someone in GMT would get using System.currentTimeMillis()??
PS: I don't use rs.getTimestamp() because the JDBC I'm using seems to have a bug there.

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How to get GMT time in Millis?!

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