Calendar in Java 1.5 and 1.3

[Aris Tan]

Hi,

I have the following code:

import java.util.*;



public class cal {
public static void main(String[] args) {


Calendar c = new GregorianCalendar();

Calendar c2 = Calendar.getInstance();
c2.set(Calendar.DAY_OF_MONTH,1);
c.setFirstDayOfWeek(c2.get(Calendar.DAY_OF_WEEK));



c.set(Calendar.DAY_OF_WEEK, 1);
c.set(Calendar.WEEK_OF_MONTH, 3);

System.out.println(c.getTime());

}
}


when I ran it in java 1.5 I get the output:
Sun Aug 21 20:40:19 EDT 2005


in java 1.3.1, this is printed out:
Sun Aug 14 20:55:11 EDT 2005


any ideas why?

[Ulf Dittmer]

I've simplified the code a bit as follows:

Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY); 
System.out.println(c.getTime()); 
 
c.set(Calendar.DAY_OF_WEEK, 1);
// System.out.println(c.getTime()); 
c.set(Calendar.WEEK_OF_MONTH, 3); 
 
System.out.println(c.getTime()); 

I'm getting the following results on OS X, with the added twist that if I uncomment the println statement above, the output of the second println changes! Looks like something fishy is happening in the 1.3.1 JVM.

Java 1.4.2
Sat Aug 06 09:12:35 CEST 2005
Sun Aug 21 09:12:35 CEST 2005

Java 1.3.1
Sat Aug 06 09:12:39 CEST 2005
Sun Aug 14 09:12:39 CEST 2005

Java 1.3.1 - activating the commented-out println statement
Sat Aug 06 09:13:28 CEST 2005
Sun Jul 31 09:13:28 CEST 2005
Sun Jul 10 09:13:28 CEST 2005

[Aris Tan]

It appears to be a bug

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4476551
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4409072