I’m a big fan of NetBeans’s hints supports as proven by my blog posts on Seven Indispensable NetBeans Java Hints, Seven NetBeans Hints for Modernizing Java Code, Creating a NetBeans 7.1 Custom Hint, ...

NetBeans is an open-source integrated development environment (IDE), tooling platform, and application framework. It's written in Java and is primarily for creating Java programs. It also, however, ...