No, you don't need all those Java consoles. One would be sufficient. Sounds like you've downloaded multiple updates and they didn't clean up after themselves. You might want to remove Java completely and, maybe, start all over.

Do you need Java? Occasionally you will. It serves a purpose kind of like Flash: It's used for programs that run in browser plugins and do things that the browser can't. Also, Java is used to write (slow, doggy) programs that run on both Windows and Linux.

What you might want to do is remove Java, and then wait until somebody complains that you need it. Then go to java.com and download and install the latest. Just once.