Game Developers Java Users Group (GameJUG)
   Mailing lists signup, membership information, resources, and links.
   https://gamejug.dev.java.net/

Java Meetup Groups
   Find groups in your area. Includes directory, photos, and message board.
   http://java.meetup.com/

Java Robotics Users Group (JRUG)
   Online group for those interested in the application of the Java programing language for robotics. Includes news, FAQs, and project information.
   http://www.java-robotics.org/

Java User Groups Worldwide
   Sun's JUG page includes index of groups worldwide as well as a finder program.
   http://community.java.net/jugs/