Which one is need ??

Which one is need ??

Good Programmer and Java common mistake

http://www.codejava.net/coding/how-to-become-a-good-programmer-13-tasks-you-should-practice-now
http://www.codejava.net/coding/10-common-mistakes-every-beginner-java-programmer-makes

http://www.programcreek.com/2012/11/top-100-java-developers-blogs/