I have used many different methods to install java because I want to get Minecraft working. I heared that if I uninstall Java it would installed Libre Office, which I do not want to do. I have a install of sun java, so I think what I'll do is delete all my OpenJDK copies, and Excess sun java 7 copies.
All I want is to rid myself of EVERYTHING JAVA except for one so I can stop feeling so java cluttered (among other things, no doubt I've got libreoffice all confused as to who to choose).
Screenshot from my /usr/lib/jvm folder: