Both Eclipse 3.0 and IntelliJ IDEA 4 are feature-rich, Java IDEs that provide syntax checking, code assistance, and code generation for coding. In addition, they both provide support for refactoring, Ant, unit testing, and CVS. And soon, the Eclipse Visual Editor 1.0 for building GUIs using either AWT/Swing or SWT will be available. But some important differences exist between the two. This article briefly compares the features, ease of use, and stability of Eclipse and IDEA.