AIX Timezone problem, Java showing one hour less

[Raghu Devatha]

 import java.util.*;
class PrintDate{
public static void main(String args[])
{
Date d=new Date();
System.out.println(d);
System.out.println(TimeZone.getDefault());
}
}   

The output of the program and the shell command 'Date' are differed by one hour, did anybody face this problem. What can be the solution.?

 $ java PrintDate
Thu Aug 13 09:02:21 GMT+05:30 2009
sun.util.calendar.ZoneInfo[id="GMT+05:30",offset=19800000,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]
$ date
Thu Aug 13 10:02:36 IST 2009
$ echo $TZ
IST-5:30IST   

$java -version
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build pap64devifx-20071025 (SR6b))
IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 AIX ppc64-64 j9vmap6423-20071007 (JIT enabled)
J9VM - 20071004_14218_BHdSMr
JIT  - 20070820_1846ifx1_r8
GC   - 200708_10)
JCL  - 20071025

[Adam Michalik]

I've seen some announcements concerning updates in JRE/JDK timezones on Sun's site. Try to check with the newest version (possibly newest JDK 6 version).

[Raghu Devatha]

Adam Michalik wrote:I've seen some announcements concerning updates in JRE/JDK timezones on Sun's site. Try to check with the newest version (possibly newest JDK 6 version).

Sorry, but I am using IBM Java

[Jeanne Boyarsky]

Raghu Devatha wrote:Sorry, but I am using IBM Java

What version? (or the JDK or more likely of WebSphere) When was it last patched?

[Paul Clapham]

Jeanne Boyarsky wrote:What version? (or the JDK or more likely of WebSphere) When was it last patched?

Looks to me like the answers to those questions were already in the original post:

IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 AIX ppc64-64 j9vmap6423-20071007 (JIT enabled)

[Jeanne Boyarsky]

Doh! I guess my point was that it looks old and maybe there is a later version.

[Nitesh Kant]

Not related to Performance. Moving to Java In General

[Mike Simmons]

Ragu, one thing is not clear from your post: between Java's output and the system "date" output, which one (if any) is actually correct? Is this a problem with Java, or a problem with how the date command is displaying the time?

I'm suspicious to see that $TZ is "IST-5:30IST" - that looks nonsensical to me. IST should be equivalent to GMT+5:30, not IST-5:30. What does that even mean? Maybe that just means that whoever came up with the TZ string value was a poor communicator, or maybe it indicates deeper technical issues.

I see discussion of a similar issue here. A good suggestion is to compare the output of "date" vs "date -u". If the difference is 5:30, good, but if it's 6:30, the problem is in your AIX system, not Java.

[Raghu Devatha]

Mike, System 'date' is giving me the correct time. I thought it was a problem with Java.

I too suspect the way my TZ variable is set. The link you suggested was helpful. The news is date and date -u gives me a difference of 6.30, so , should be problem with my AIX machine. I will post the solution after I get

Thanks a lot for your help,

-Raghu

[Raghu Devatha]

Daylight Savings Time option was enabled for IST but IST do not use any DST. Disabling the DST option and correcting TZ variable value helped.

Java and date are now showing the same time. 'date' and 'date -u' results in a 5.30hrs difference.

Thanks a lot Mike Simmons.