I switched from Eclipse to Netbeans
Netbeans homepage after getting very *!?&%! off with Jigloo which I'd been trying to use. Netbeans has a built-in GUI builder and I think it's a lot easier to use.
Having said that, I do agree with Michael. Navigating through heaps of generated code is a lot messier than hand-writing the code yourself, and if you're still getting to grips with Swing (as I am), you may find it a more valuable learning experience to code everything yourself.
(I don't think all that ugly generated code does my OCD too good either!)