Compiling Java 6 on 10.5.8

[Russell Jones]

I meant Java Preferences in /Applications/Utilities
AIUI, Sun released as much as they could as GPL without violating third party license agreements. There is the GNU Classpath project to clone Java which predates this, OpenJDK which is Sun's release IIRC, and Iced Tea which I think is an attempt to fill in the gaps in OpenJDK with Classpath and new code. That's from memory and I have the idea the story is even more complicated than that. I'd imagine Wikipedia has the details. 

Russell

To: MacPorts Users
Subject: Compiling Java 6 on 10.5.8

Is it possible to compile Java 6 on 10.5.8?

I'm not concerned about the graphic front-end support (from what I
understand, that has to come from Apple because they modify it for
their system). I'm looking at wanting to compile server-side /
back-end java code.

How much of Java has been open-sourced?