Update post: Java Daylight Saving Time and Time Zone

You don’t have to download a new JRE with the updates; you can just update the JRE you already have. The tool will be maintained to provide the latest updates as they’re needed. So, when this happens again (and it will), you’ll just need to use this tool instead of replacing your JRE.

see:

Java Daylight Saving Time and Time Zone

Sun Java SE TZupdater tool