Lets start with Java Installation

Install your Java program software same like other softwares.

Open your program files in C: drive

Then open Java folder

Then open JDK folder which is having version name.

Then open bin folder

Ok.. Now copy you address which is having your path to bin folder

eg: C:\Program Files\Java\jdk1.6.0_01\bin

Ok

Now

Right click on my computer

Go to Properties

Click Advance

Click Environment Variables which is in left hand bottom

See there word for System variables

In that Variable column you can find a name call path

Double click on that

You will get new screen call EDIT SYSTEM VARIABLE

in that click on Variable Value box

move the Courser to right hand corner and click

ok now paste your address path to bin folder

and click ok

after finish everything you better restart your machine.

You have done now :)

How to check whether you have done it properly or not ??

its very simple

Go to command prompt and type java -version     presses enter.

Then you will get your Java version details

Then type javac and press enter. Please see whether you will get screen like my one. If so you are perfect to start java cording in command prompt.