PMD - PMD

PMD - PMD: "PMD 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 has plugins for JDeveloper, Eclipse, JEdit, JBuilder, Omnicore's CodeGuide, NetBeans/Sun ONE Studio, IntelliJ IDEA, TextPad, Maven, Ant, Gel, JCreator, and Emacs. You can download everything from here."