Java SE 6 Update 21 Released

Oracle has just released the Java SE 6 Update 21.

This version is compatible with new system configurations :

• Oracle Enterprise Linux 5.5, 5.4, 4.8
• Red Hat Enterprise Linux 5.5, 5.4
• Oracle VM 2.2.0.0.0
• Google Chrome 4.0

This version integrate the Java Hotspot VM 17.0. There is several improvements, by example in compressed object pointers, escape analysis, code cache management, Mark-Sweep and G1 garbage collection algorithms. You can enable G1 with

-XX:+UnlockExperimentalVMOptions -XX:+UseG1GC

This version integrate also the last version of Java Visual VM, the 1.2.2. For more informations, consult the VisualVM official site.

There is an important bug fix about drag and drop. There is no security updates on this update. The list of BugFixes on the site of Java.

You can now add a progress indicator in Applet and Java Web Start applications really easily. For informations, you can consult this list of tutorials.

For complete informations about the release, consult the release notes of Java SE 6 Update 21.

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