IntroductionAs of May 2008, Facebook has discontinued any support of their official Java client, directing users interested developing Facebook applications in Java to use one of the various third-party clients out there. As such, the purpose of this project is now to maintain, support, and extend the abandoned code base to provide a high-quality, up to date version of the Facebook API client for Java developers, and to keep the Java client up to date as the Facebook Platform API changes and evolves.
http://code.google.com/p/facebook-java-api/