P.S. I tried updating my java from 1.4 but SPM doesn't have a more recent version.

It looks like you'll have more success running Java apps when Java is working properly.

Instructions for installing Java 1.5 on Ubuntu Dapper are here:

https://help.ubuntu.com/community/Java

Or here if you want the latest 1.6:

http://ubuntuforums.org/showthread.php?t=332674

-Jared