Name: dfC67450 Date: 05/29/98



Javadoc says about java.util.Calendar.roll(int field, boolean up):

 When rolling on the month or Calendar.MONTH field, other fields like
 date might conflict and, need to be changed. For instance,
 rolling the month on the date 01/31/96 will result in 03/02/96.

In current implementation of GreagorianCalendar rolling the month on
the date 01/31/96 will result in 02/29/96.

Here is the test demonstrating the bug:
------------- Test.java -----------
import java.util.*;

public class Test {
    public static void main (String args[]){
      GregorianCalendar calendar = new GregorianCalendar(1996, 0, 31);
      System.out.println("init date: " + calendar.getTime());
      calendar.roll(Calendar.MONTH, 1);
      System.out.println("after rolling on month: " + calendar.getTime());
    }
}
---------Output from the test---------------------

init date: Wed Jan 31 00:00:00 GMT+03:00 1996
after rolling on month: Thu Feb 29 00:00:00 GMT+03:00 1996

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