I checked Eclim http://eclim.org/ some time ago for a friend. Basically, it allows you to run Eclipse in silent mode, using vim for editing, and so on. Thanks to the extension, it allows Vim to use all the strengths of both worlds, adding, for example, the Eclipse project tree to your favorite editor!
The installation was a bit complicated at that time, but as soon as I started it, it was a really smooth and rather brilliant solution. Try it, I'm sure you will not be disappointed. And installation is probably easier now. :)
Oh, I should also mention that there are several Eclim installations. You can have a carefree Eclipse with vim as the main interface (as I mentioned earlier), you can have an Eclipse and Vim header so you can easily switch back and forth (in the same project at least), or you can have Vim Integrated in Eclipse.
Sarah source share