wolfs are great:

An easier solution for getting Ubuntu would be to grab and extract this Ubuntu image from my server:

ubuntu-m5-v1.img.ext2.lzma

mbertacchi:

There's actually a couple of packages available to put full Java (including Swing / AWT) directly in Maemo, without going through Debian. Do some searches.

But Easy Debian already has OpenJDK installed. Just run your Java apps with "java -jar appname.jar" and it should work.