How to use emacs as my JAVA IDE?

I would like to use ema开发者_如何学编程cs instead of Netbeans which gets too bloated on my computer. I already have JDEE, I did not dig it, but it looks like it lacks:

• Classes testing : run a class which has a main method, but which is not the main class of the project
• Maven integration : this is a minor wish as Netbeans doesn't support maven that well too.

I recommend you to use malabar-mode instead of JDEE - malabar is the only modern mode for Java development currently available for Emacs. It offers:

• Tight integration with Maven

• A Groovy console for rapid prototyping and exploratory programming

• JUnit integration, both for running tests standalone and through Maven

• Import help; import one class or all needed classes in the buffer (with prompting if the class name is ambiguous)

• Extend class / implement interface / override method helpers

• Simplistic refactorings

For Maven look to ede-proj-maven2 (inherited from ede-generic) in current CEDET from CVS. It's simple, but does some job. I plan to look to it in the near future, because I use Maven very often with Clojure.