check out this sites , it could be so helpful..http://www.sourceforge.net/http://www.planetsourcecode.com/http://www.javagalaxy.com/Java.jsphttp://www.hotscripts.com/http://www.java2s.com/http://www.javaalmanac.com/http://www.javapractices.com/index.cjphttp://www.sys-con.com/java/sourcec.cfmand of course sun java official forums:http://forum.java.sun.com/forum.jspa?forumID=31