1) Java World
Java World is one of the best sites for java users that share all the useful topics, tips & tricks, tutorials and latest technologies related to java and more like Mobile Java, Java App Dev, java Tips and Core java.
2) Java SE
Here learn about Java SE 8 as features, enhancements, java tutorials and Java SE API and more.
This is another excellent site for java developers called Coursera provides 639 online free courses. Its educational platform that helps up-coming developers to start their task easily. Just type your topic on search box and find the full detail of that topic.
Developer.com share every kind of stories related to java development. It provides Enterpricse Java, J2ME, java servlet , JDBC and other information.
Programcreek, here users can get basic java, java API examples, web frameworks eclipse and coding interviews, etc.
Java.Net introduce all the information related to java including Blogs, magazine, articles latest news and many more.
This site provides latest java tutorials and java resources with more useful sections like download, features, FAQ, Forums.
Stack Overflow is pure question and answer site for programmers and developers. This is quality site.
This site shares articles on java, latest news, topics and other useful resources as java IDE tools, java and XML, java data books, java MEdia, java Security, open source java, Web services, Wireless java and many more.
12) Java Ranch
java ranch is the place where developers can find the current topics and latex news related to java, Also JSP, servlet, JDBC, Tomcat, Struts EJB, Scala, and many more.
Dzone is the mot popular sites among designers and developers share share their blog articles.
Powerful collaboration, code review, and code management for open source and private projects.
Place where users can read latest articles, this site has a big amount of data of all the popular languages.
17) Java Source
Java Source presents Open Source Software in Java.
Find out what Java is, who created it, and why people choose to program with it, everything you can find on java.about.com.
19) The Server Side
The serverside.com is a Enterprise java Community with enterprise java development, java tools, java management, Modular code, java in the cloud.
This site have many section of many popular language including Java with latest News, articles and tutorials.
21) Java 2S
Java 2S, sites has the section of java, in this section beginners can get java tutorials, Java Projects, Java by API, java products, Java file download and many more useful topics.