[MrMysteri0us]

You could wrap all of your code in a while statement.
pseudo-code example:

Code

while (!inputString.equals("exit")) {...}

[MrMysteri0us]

Yes, you could do that as well, it's not good code (to use while(true)) after all, but it's probably good enough for your class :)
No it wouldn't. You have to use "return;" instead of "break;" in case 6.