How to download JDK 1.6?  
In this video tutorial I have shown you the steps for downloading JDK 1.6..

Difference between Java 6 and Java 7  
Java 6 was launched on December 11, 2006 with various features and developments.Java Version SE 7 was launched on July 28, 2011 and its code name was Dolphin..

Difference Between Java 5 and Java 6  
Java 5 is known as codenamed Tiger, it was released in September 2004. Java 6 is codename is Mustand and it was released in December 2006..