Q:

which java should i use for ubuntu 13.04 64bit

I'm new to ubuntu (but i like it a lot), so please bear with me.
I want to install Java, but which one should I install? 

The RPM or the normal one? 
32bit or 64bit?

From what I know, even windows 64 bit is still using java 32 bit. This thing make me confused.
I'm asking here just to make sure everything is going to be all right, because I will need my system to be ready to code (eclipse :D) pretty soon, so I want to avoid any trouble now.
Thanks for your help, and sorry for my basic question.

A:

If you are using Ubuntu, you don't need to worry about this. Open the software center and search for eclipse. The installation of eclipse will also take care of the Java jdk.

