I've recently upgraded my Ubuntu distribution to Karmic Koala with the rest of the world, but due to a small mishap I've got to reinstall Java for Mozilla Firefox. However, I'm having trouble installing it. I've gone and looked in Synaptic Package Manager, but there's no Java for a 64 bit computer (which is what I've got) and the files from the official site don't install properly, even going through the terminal with sudo. What am I doing wrong? Thanks for any help you can provide.