Working Java on Ubuntu Gutsy 7.10 x64 (EMT64, AMD64) - Including Firefox Plugin

Sun's Java doesn't have a working 64-bit plugin, and the IcedTea version included with Ubuntu Gutsy 7.10 doesn't work properly... however loading a newer version will resolve the issue.  Note, not all java applets will work, but most of the ones I have tried work without issue.  

First, you need to add the following repositories to your /etc/apt/sources.list ...

deb http://people.ubuntu.com/~doko/ubuntu/ gutsy/ deb-src http://people.ubuntu.com/~doko/ubuntu/ gutsy/

This can be done with vi, nano or directly through synaptic.. after you have added these, run..

sudo apt-get update 
sudo apt-get install icedtea-java7-bin icedtea-java7-jre icedtea-java7-plugin

Restart Firefox and enjoy working java applets.

If you need a solution for Flash under x64, click here.