I understand the differnece between Date and Calendar, and why
I would prefer to use Calendar.  However, I'm stuck with Date
in this instance.

I want to add a secific number of months to a Date.  Looks like
I do it by converting to a Calendar, using Calendar.add(), and
converting back to Date.  The following SSCCE isn't working for
me -- endDate is unchanged from beginDate.  Can anyone point out
what I'm doing wrong (or if there's a better approach)?  Thanks.

import java.text.*;
import java.util.*;

public class Test {
 public static void main(String[] args) {
   DateFormat format = new SimpleDateFormat("mm/dd/yyyy");
   Date beginDate = format.parse("10/01/2005", new ParsePosition(0));

   GregorianCalendar calendar = new GregorianCalendar();
   calendar.setTime(beginDate);
   calendar.add(Calendar.MONTH, 3);
   Date endDate = calendar.getTime();

   System.out.println("Begin: " + format.format(beginDate));
   System.out.println("End: " + format.format(endDate));
 }
}