Remote Eclipse Debugging
This article on Configuring Eclipse for Remote Debugging is very useful. Java debugging is really nice, because of the protocol for debugging a remote JVM. The first time I managed to debug a servlet in Eclipse, I was astonished.
Hang in there with the article. Most of it is irrelevant if you’ve used Eclipse at all before. Look for the heading Configuring a Remote Debugging Configuration in Eclipse, that’s where the useful bits start.