Please follow these steps:

Press the Windows key on your keyboard or click the Windows Start orb.

Right-click on Computer.

Select and click Properties from the context menu.

Select and click Advanced system settings link.

Select Advanced.Click Environment Variables.

Scroll down to the section System Variables,find the PATH environment variable and select it.

Click Edit.

Tips: Select and Copy the Variable value and paste it on your favourite text editor and save it.

Note:The PATH environment variable is a series of directories separated by semicolons (;)

WARNING: Do not delete this path.Append the path with with semicolon;

Add the location of the bin folder of the JDK

installation to the PATH variable in System Variables. This may look like:

C:\Program Files\Java\jdk1.8.0_121\bin

Tips: To find exactly the location of the bin folder of the JDK installation follow these steps:

Press the Windows key on your keyboard or click the Windows Start orb.

Click on computer.

Click on Windows7_OS(C:)under Hard Disk Drives.Scroll down select and click on Program Files

Scroll down select and click on Java folder

Click on jdk folder.

Click on bin folder.

Select the entire path from the address bar.

Copy the path

Appending with a semicolon at end of existing path and paste the Path you just copied.

Click OK.

Click OK to close the Environment Variables dialog.

Click OK to close the System Properties dialog.

Congratulations, you have successfully set the path and environment variables in windows 7