Name: rmT116609 Date: 09/03/2003


FULL PRODUCT VERSION :
java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
Java HotSpot(TM) Client VM (build 1.4.2-b28, mixed mode)

FULL OS VERSION :
Windows NT Version 4.0

A DESCRIPTION OF THE PROBLEM :
Calendar.set() in my program don't work correctly after Calendar.clone() and Calendar.roll(). See prepared test case please.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile and run the program from "Source code for an executable test case"

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
java.vm.version : 1.4.2-b28
  Today : Fri Aug 29 14:27:06 CEST 2003
First day of week : Sun Aug 24 14:10:19 CEST 2003

ACTUAL -
java.vm.version : 1.4.2-b28
  Today : Fri Aug 29 14:27:06 CEST 2003
First day of week : Fri Aug 29 14:27:06 CEST 2003

The test case works fine with 1.4.1_05.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.*;
import java.text.*;

public class CalendarBug {
  public static void main(String[] args) {
    System.out.println("java.vm.version : " +
System.getProperty("java.vm.version"));
    Calendar calendar = GregorianCalendar.getInstance(Locale.US);
    int firstDayOfWeek = calendar.getFirstDayOfWeek();
    calendar.roll(Calendar.MONTH, -1);
    calendar.roll(Calendar.MONTH, 1);
    Calendar tempCalendar = (Calendar) calendar.clone();
    System.out.println("Today : " + tempCalendar.getTime());
    tempCalendar.set(Calendar.DAY_OF_WEEK, firstDayOfWeek);
    System.out.println("First day of week : " + tempCalendar.getTime());
  }
}


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
change

tempCalendar.set(Calendar.DAY_OF_WEEK, firstDayOfWeek);

with

int daysFromFirst = firstDayOfWeek - tempCalendar.get(Calendar.DAY_OF_WEEK);
tempCalendar.roll(Calendar.DAY_OF_WEEK, daysFromFirst);
(Incident Review ID: 201029)
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