Name: bsC130419 Date: 06/29/2001


java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)

Appended code illustrates the problem, which occurs when setFirstDayOfWeek()
and setMinimalDaysInFirstWeek() are used. Actual and expected output
noted in code comments.

May be related to bug 4459653

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import java.util.*;

public class Test {

    public static Calendar getDefaultCalendar() {
        Calendar cal = Calendar.getInstance();
        return cal;
    }
    
    public static Calendar getIsoCalendar() {
        Calendar cal = Calendar.getInstance();
        // ISO weeks start on a monday
        cal.setFirstDayOfWeek(Calendar.MONDAY);
        // The first ISO week of a year contains the first Thu of the year
        cal.setMinimalDaysInFirstWeek(4);
        return cal;
    }
    
    public static void main(String[] args) {
        
        System.out.println("\nUsing ISO calendar:");
        System.out.println("===================");
        
        Calendar cal1 = getIsoCalendar();
        cal1.set(2001, Calendar.AUGUST, 5);
        int w1 = cal1.get(Calendar.WEEK_OF_YEAR);
        System.out.println("Week number for Sun 5th Aug 2001: " + w1);
        // Above line correctly prints week "31"

        Calendar cal2 = getIsoCalendar();
        cal2.set(Calendar.YEAR, 2001);
        cal2.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
        cal2.set(Calendar.WEEK_OF_YEAR, 31);
        System.out.println(" Date for Sun in week 31 of 2001: " + cal2.getTime().toString());
        // Above line should print week "Sun 5th Aug", no?
        // Actually it prints "Sun Jul 29", which is in week 30.
        
        System.out.println("\nUsing default calendar:");
        System.out.println("=======================");

        Calendar cal3 = getDefaultCalendar();
        cal3.set(2001, Calendar.AUGUST, 5);
        int w3 = cal3.get(Calendar.WEEK_OF_YEAR);
        System.out.println("Week number for Sun 5th Aug 2001: " + w3);
        // Prints week "32". Not sure what "default" means but let's play along.
        
        Calendar cal4 = getDefaultCalendar();
        cal4.set(Calendar.YEAR, 2001);
        cal4.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
        cal4.set(Calendar.WEEK_OF_YEAR, 32);
        System.out.println(" Date for Sun in week 32 of 2001: " + cal4.getTime().toString());
        // Prints "Sun 5th Aug 2001".
        // Unlike the ISO case, this is at least consistent.

    }
    
}
(Review ID: 127557)
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