The eclipse-cs Checkstyle plug-in integrates the well-known source code analyzer Checkstyle into today's leading IDE - Eclipse.
With the Checkstyle Eclipse plug-in your code is constantly inspected for problems. Within the Eclipse workbench you are notified of problems via the Eclipse Problems View and source code annotations just as you would see with compiler errors or warnings.
Version 4.1.0 beta2 of the eclipse-cs plugin was just released. It contains some bugfixes and minor features over 4.1.0 beta.
Please read here http://eclipse-cs.sourceforge.net/release_notes.html for more info.