Online Tutorial Sites

Online Courses Web References

1. http://alison.com/
2. http://www.studytonight.com/library/

Web Sites For Learn 

1. http://java67.blogspot.sg/
2. http://javarevisited.blogspot.sg/
3. http://www.programcreek.com/

Recommended Web Sites for JavaSE and jEE and

1. http://blog.arungupta.me/
2. http://blog.eisele.net/
3. https://blogs.oracle.com/reza/
4. https://pragmaticintegrator.wordpress.com/
5. http://antoniogoncalves.org/
6. http://www.adam-bien.com/roller/abien/
7.  http://www.topjavablogs.com/

(http://javarevisited.blogspot.sg/2015/01/top-5-blogs-java-ee-developers-should-follow.html)






OOPs concepts in Java

1. http://beginnersbook.com/2013/04/oops-concepts/

String in Java

1. http://javarevisited.blogspot.sg/2015/01/3-examples-to-concatenate-string-in-java.html
2. 
   

Null in Java

1. http://javarevisited.blogspot.sg/2014/12/9-things-about-null-in-java.html