Artima Forums
   Discussion forums for Java, Jini, J2EE, and object-oriented software design and development.
   http://www.artima.com/forums/

DevX Discussion Groups
   Contains forums on Java and related technologies.
   http://news.devx.com/

Java Forums
   Forums supported by the Java-Tips.org website developers. Topics cover Standard, Enterprise and Micro Edition as well as 3rd party APIs, IDEs and education.
   http://www.java-forums.org/

Java Language Forum at Tek-Tips
   Technical support forums and mutual help system for computer professionals.
   http://www.tek-tips.com/threadminder.cfm?pid=269

Java Technology Forums
   User discussion areas at IBM's developerWorks.
   http://www-128.ibm.com/developerworks/forums/dw_jforums.jsp

JavaGaming.org
   Message boards for the games developer.
   http://www.javagaming.org/

JavaKB
   Discussion threads on JavaBeans, Servlets, JDBC and other Java technologies.
   http://www.javakb.com

JavaRanch Big Moose Saloon
   Forums on a range of topics including Java technologies, certification, software engineering, jobs and single products.
   http://saloon.javaranch.com/

P2P - Java
   A forum where you can share knowledge with fellow programmers. Java section.
   http://p2p.wrox.com/default.asp?CAT_ID=19

Portlet Discussion
   Portlet is a new and emerging technology. This group is created with the objective of discussing portlets and related technology, their usability and problems associated with them.
   http://tech.groups.yahoo.com/group/portlets/