The correct way to set and get hour, minutes, sec

Question

I am trying to get some information out of a database and then using that information to get some statistics.

I want to get statistics based on an interval of hours,

Answer 1

Using the java.util.Calendar

Calendar c = Calendar.getInstance();
c.set(Calendar.DATE, 2);
c.set(Calendar.HOUR_OF_DAY, 1);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);

Or use Joda Time http://joda-time.sourceforge.net/.