[PLUG] JDK for CS Ubuntu

[Amit Karpe]

Hi all,
             I am trying to install Java Dev. Kit ( JDK ) for CS Ubuntu .
As I have limited space , I don't want to use Sun-Java5-jdk .
I had gone through https://help.ubuntu.com/community/Java and
https://wiki.ubuntu.com/JavaPolicy and also all that I get from
http://www.google.co.in/search?q=ubuntu+java+alternatives

Which JDK I should use ? As I have very limited Space for my Live CD .

What is diff between these packages
1. free-java-jdk
2. gcj
3. java-gcj-compat and java-gcj-compat-dev



-- 
Regards
Amit.