It's default uses the time zone of your machine....Try out some of this
code, and maybe it will help you with what you are looking for...

       Calendar cal = Calendar.getInstance();
       System.out.println(cal.getTimeZone());

       //List of Ids, you'll need these to set the timezone.
       for (String id : TimeZone.getAvailableIDs()) {
           System.out.println(id);
       }

       TimeZone parisZone = TimeZone.getTimeZone("Europe/Paris");

       DateFormat def =
DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG,
Locale.FRANCE);
       def.setTimeZone(parisZone);

       Calendar cal2 = Calendar.getInstance(parisZone);
       System.out.println(cal2.get(Calendar.HOUR));
       System.out.println(def.format(cal2.getTime()));
       System.out.println(cal2.getTimeZone());
       System.out.println(cal2.getTime()); //Careful toString() of
java.util.Date does things different