Pre-requisite before installing Android Studio on Windows system

Pre-requisite:

1. Before installing Android Studio you need to install JDK in your system.
2. Download JDK from below link: http://www.oracle.com/technetwork/java/javase/downloads/index.html 
3. Post installation of JDK, you can verify by running below command in command prompt window:
   javac -version 
    
4. After installation of JDK, you need to set the JAVA_HOME in environment variable. Follow below steps for setting JAVA_HOME in Environment Variables
• Open Control Panel 
• Click "System and Security"
• Click "System"
• On Left Hand Nav , click "Advanced system settings"
• System Properties popup window will appear.
• Click Advanced tab
• On bottom you will find "Environment Variables..." button.
• Below is the screenshot for better illustration:

       

                     Click "Environment Variables..." button and you will see "Environment Variables"                                popup window appears.

       4.  Under "System variables" section , click New.

            

       

      5.  New System Variable popup will appear. Provide the new System Variable name and path                   where JDK is installed in Variable Value field. Click OK.