PMD is an Eclipse plug-in that scans Java source code and looks for potential problems like:

• Empty try/catch/finally/switch blocks
• Unused local variables, parameters and private methods
• Empty if/while statements
• Overcomplicated expressions - unnecessary if statements, for loops that could be while loops
• Classes with high Cyclomatic Complexity measurements

PMD is not just for Eclipse it also has plugins for JDeveloper, Eclipse, JEdit, JBuilder, Omnicore's CodeGuide, NetBeans/Sun ONE Studio, IntelliJ IDEA, TextPad, Maven, Ant, Gel, and Emacs

This plug-in is written for version 2.0 of Eclipse,it may not work with earlier versions.