I don't think the following statement is true any longer but want to verify.
I think everything is running on the latest versions of both OpenJDK and Oracle Java but want to verify.You must have Java 1.6 or later (also called Java 6) installed on your system to run these tools. Note that the OpenJDK/Java 7 does not currently work. Some tools require Java 5 or later as indicated on the Launch page. If you are using Mac OS X, your Java implementation is provided by Apple. Use Software Update to ensure you have the most up to date version.
Regards,
Keith