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Utkarsh,
On 3/23/16 3:27 AM, Utkarsh Dave wrote:
> Thanks Chris and John for the response.
>
> Chris - We do not use date formats to display
This is the root of your problem.
> , but we are facing issue like
> System.out.println(java.util.TimeZone.getDefault().getID()); //This
> prints UTC, which is incorrect
The default time zone of your application should not matter, though
changing it midstream could seriously confuse things. If you have a
rogue library that is changing the default timezone to UTC, then maybe
you should run in UTC all the time to avoid unpredictability.
> System.out.println(System.getProperty("user.timezone")); //which
> prints IST, that is correct
This setting isn't really relevant after the JVM initializes.
user.timezone just seeds TimeZone.getDefault.
> System.out.println(new java.util.Date().toString()); //prints Mon
> Feb 08 10:42:18 UTC 2016.
You need to use a DateFormat with a TimeZone, then you'll get the
values you expect.
> After restarting tomcat things get reset. On one of the blogs I
> found setting the default timezone at start time is: java
> -Duser.timezone=<server time>. I will try this.
It won't help.
> But didn't quiet understood that why suddenly when everything works
> fine, one odd day the UTC time zone starts displaying.
Try running under a SecurityManager; you'll probably find a component
that tries to set that system property. Go complain to whoever wrote
that code.
- -chris
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