PMD

PMD scans Java source code and looks for potential problems like:

  • Unused local variables
  • Empty catch blocks
  • Unused parameters
  • Empty 'if' statements
  • Duplicate import statements
  • Unused private methods
  • Classes which could be Singletons
  • Short/long variable and method names

PMD has plugins for JEdit, JBuilder, Netbeans/Forte/Sun ONE, IntelliJ IDEA, Maven, Ant, Eclipse, Gel, and Emacs. You can download everything from here .

Thanks to the Cougaar program for sponsoring PMD!