Java on GNU Emacs 24.

If someone is still writing Java on emacs, can they share tips/tricks on setting up a good development environment. Currently I'm using GNU Emacs 24.1.1 and auto-complete-config. I tried JDEE but was very painful to setup. What I am missing is that even though auto-complete can complete words, it does not know about functions/methods in a class, etc. Thanks.