Indeed Renjith R, I have also learned a lot from Java Certification books, especially minor details like the difference between start vs run method and much more.
If anyone needs, I have shared some of the best Java certification books below
Written by javinpaul
I am Java programmer, blogger, working on Java, J2EE, UNIX, FIX Protocol. I share Java tips on http://javarevisited.blogspot.com and http://java67.com