For Better Coding ........

Java Coding Rules

http://www.appperfect.com/support/java-coding-rules/java-coding-rules.html

Java Optimization Rules

http://www.appperfect.com/support/java-coding-rules/optimization.html

Twelve rules for developing more secure Java code

http://www.javaworld.com/article/2076837/mobile-java/twelve-rules-for-developing-more-secure-java-code.html

Google Java Style

https://google-styleguide.googlecode.com/svn/trunk/javaguide.html