Firstly, IBM JDK 5 (for AIX) is supported until 2012 . I could not find any explicit dates for the Linux / x64 series; You can check with IBM itself.
Secondly, I'm not sure if IBM released a JRE or SDK against Solaris / SPARC; The version of the JDK used on Solaris usually tends to be the Sun JDK, which will work well even for WebSphere.
Vineet reynolds
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