cracking jcreator, is it difficult?

[new_profile]

I've already tried JBuilder, JCreator, Netbeans (not the 4.0 beta yet) and IntelliJ IDEA. The best, IMHO, is IntelliJ.

[Mkz]

How about Eclipse?
I don't really know the others in detail, but I doubt they are as extensible as Eclipse. A good base distribution with full source, and then a lot of existing plugins and the api's to create your own.
And another advantage: many of those plugins are commercial, hence have "protections"

Yeah, Eclipse is extensible, too much extensible, IMO
It lacks a lot of features IDEA has
It even seems they take most of their ideas from IDEA releases
Anyhow, IDEA is the ultimate IDE for Java programming