Name: nt126004 Date: 05/17/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)


FULL OPERATING SYSTEM VERSION :
SunOS cwit115 5.8 Generic_108528-07 sun4u sparc
SUNW,Ultra-5_10

A DESCRIPTION OF THE PROBLEM :
The getDSTSavings() method of SimpleTimeZone should give
the daylight savings offset for the timezone. With JDK 1.4
this value always seems to return 0 (with 'always' = the
10 or so timezones which use daylight savings time that I
tried :-)

Even if useDaylightTime() = true, getDSTSavings still
returns 0.

REGRESSION. Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Run the code included with JDK 1.4
2. Run the code included with JDK 1.3.1
3. Compare output (in particular last line in the set)

EXPECTED VERSUS ACTUAL BEHAVIOR :
Results with JDK 1.3.1
      offset from GMT = 0
      ID = Europe/London
      tz uses dst = true
      DST offset = 1
      **********************************
      offset from GMT = -5
      ID = America/New_York
      tz uses dst = true
      DST offset = 1
Note DST offset = 1hr in both cases


With JDK 1.4 the results are
      offset from GMT = 0
      ID = Europe/London
      tz uses dst = true
      DST offset = 0
      **********************************
      offset from GMT = -5
      ID = America/New_York
      tz uses dst = true
      DST offset = 0
Note in this case DST offset = 0

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No error message

This bug can be reproduced always.

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

public class TimeZoneTest
{

  public static void main(String [] args_)
  {
    TimeZone tz = TimeZone.getTimeZone("Europe/London");
    SimpleTimeZone stz = new SimpleTimeZone( tz.getRawOffset(), tz.getID() );
    int offset = stz.getDSTSavings();
    int convert = 1000 * 60 * 60;

    System.out.println("offset from GMT = "+(tz.getRawOffset()/convert));
    System.out.println("ID = "+tz.getID());
    System.out.println("tz uses dst = "+tz.useDaylightTime());
    System.out.println("DST offset = "+(offset/convert));
    System.out.println("**********************************");

    tz = TimeZone.getTimeZone("America/New_York");
    stz = new SimpleTimeZone( tz.getRawOffset(), tz.getID() );
    offset = stz.getDSTSavings();
    System.out.println("offset from GMT = "+(tz.getRawOffset()/convert));
    System.out.println("ID = "+tz.getID());
    System.out.println("tz uses dst = "+tz.useDaylightTime());
    System.out.println("DST offset = "+(offset/convert));
  }
}
---------- END SOURCE ----------

Release Regression From : 1.3.1
The above release value was the last known release where this
bug was known to work. Since then there has been a regression.

(Review ID: 146683)
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