http://www.theserverside.com/ (Your Enterprise Java Community)
http://java.sun.com/
http://www.javapassion.com/
http://www.java2s.com/
http://roseindia.net/
http://www.tech-faq.com/java.shtml
http://javateacher.co.in/
http://www.dickbaldwin.com/toc.htm
http://www.personal.kent.edu/~rmuhamma/Systems/java.htm