Installing JDK is the first step in learning Java Programming. If you are using Windows 8 or Windows 7 Operating System, then installing JDK is quite easy as you just need to follow instructions given by the Java SE Installation wizard. The only thing which requires some attention is, choosing the correct JDK installer based upon, whether you are running with 32-bit or 64-bit Windows 8 or Windows 7 OS. JDK 7 is the latest Java version but JDK 6 is still most popular in the software and programming world. You can choose to install JDK 7 or JDK 6 based on your course material.