United StatesChange Country, Oracle Worldwide Web Sites Communities I am a... I want to...
JDK-6362432 : (tz) TimeZone.getDefault() returns incorrect timezone.

Details
Type:
Bug
Submit Date:
2005-12-13
Status:
Closed
Updated Date:
2010-07-29
Project Name:
JDK
Resolved Date:
2006-06-05
Component:
core-libs
OS:
windows_xp
Sub-Component:
java.util:i18n
CPU:
x86
Priority:
P4
Resolution:
Cannot Reproduce
Affected Versions:
1.4.2
Fixed Versions:

Related Reports
Relates:

Sub Tasks

Description
FULL PRODUCT VERSION :
java version "1.4.2_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
If I set my timezone to (GMT+8:00) Kuala Lumpur, Singapore with 'Automatically adjust clock for daylight saving changes' checked on other timezones (because (GMT+8:00) Kuala Lumpur, Singapore itself doesn't have Daylight Saving Time), run the test progam, it returns incorrect default timezone as GMT.
If I uncheck the Daylight Saving checkbox, it returns correct timezone as GMT+8:00.
But if I set my timezone to (GMT+8:00) Perth or (GMT+8:00) Beijing, it returns correct timezone regardless whether I set the Daylight Saving time in other regions.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Test 1:
1. Select Windows XP timezone as (GMT+10:00) Canberra, Melbourne, Sydney.
2. Check the 'Automatically adjust clock for daylight saving changes' checkbox.
3. Change the timezone to (GMT+8:00) Kuala Lumpur, Singapore.
4. Run test program

Test 2:
1. Select Windows XP timezone as (GMT+10:00) Canberra, Melbourne, Sydney.
2. Uncheck the 'Automatically adjust clock for daylight saving changes' checkbox.
3. Change the timezone to (GMT+8:00) Kuala Lumpur, Singapore.
4. Run test program


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
For Test1, it should return as follows,

sun.util.calendar.ZoneInfo[id="GMT+08:00",offset=28800000,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]
ACTUAL -
sun.util.calendar.ZoneInfo[id="GMT",offset=0,dstSavings=0,useDaylight=false,tran
sitions=0,lastRule=null]

REPRODUCIBILITY :
This bug can be reproduced always.

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

public class DefaultTimezoneTest {
  public static void main(String[] argv) {
    System.out.println("Current Time Zone:");
    System.out.println(TimeZone.getDefault());
  }
}
---------- END SOURCE ----------

                                    

Comments
EVALUATION

Closing this CR as "Not Reproducible".
                                     
2006-06-05
EVALUATION

I cannot reproduce this bug with 1.4.2_03 on my Windows XP environment.

My result for Test 1:
Current Time Zone:
sun.util.calendar.ZoneInfo[id="GMT+08:00",offset=28800000,dstSavings=0,useDaylig
ht=false,transitions=0,lastRule=null]

My result for Test 2:
Current Time Zone:
sun.util.calendar.ZoneInfo[id="Asia/Singapore",offset=28800000,dstSavings=0,useD
aylight=false,transitions=8,lastRule=null]

Now I have a question to the submitter. What does your test program display for Test 2? Same as mine?
                                     
2005-12-20



Hardware and Software, Engineered to Work Together