Thanks for all the Replies to my original post 
When u start Afresh to Learn SAP HANA and installing the tools on 64 -bit windows :-
Step 1 : Install JDK or JRE .
I found a link to share :
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
Step 2 :
Once you are done with installation, set the env variables. Right click My Computer> properties> Advanced settings->Envoirmental Variables
Add two system variables:
E.g. if you have installed JDK . Its rests in the following path
JAVA_HOME: c:/program files/java/<jdkfoldername>
CLASSPATH: %JAVA_HOME%/bin
In My case
Step 3 : Download and Unzip
sapjvm-7.1.018-windows-x64.zip
Step 4 : Download and Unzip neo-javaee6-wp-sdk-2.34.16.1.zip
Inside your Folder DRIVE:\<Folderpath>\eclipse-jee-juno-SR2-win32-x86_64\eclipse
eclipse.exe file would be there run it .
Create workspace and start using .
Cheers
Nitin