Install Java on Ubuntu 10.04

After upgrading to Ubuntu 10.04, I noticed that Java was no longer accessible. Furthermore the manual installation methods do not seem to work, nor will the default repository install. Here's what I had to do to get it working with the Firefox plugin:

1. Add the repository: sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
2. Update the repository cache: sudo aptitude update
3. Perform the install: sudo apt-get install sun-java6-bin sun-java6-jre sun-java6-plugin
4. Restart Firefox

Now all is working.