How to convert .class file to .java file

Step 1: Download Jad Link here JAD (UnZip it)

Step 2: Set environment variable.
           

Goto > PATH click EDIT

Open the location where JAD.exe is present

Copy the path by clicking in the highlighted location 

Paste it in end of Variable value and add ; at the end

Click Ok> OK

Step 3: Open CMD go to the location where your .class file is present 

             run the commend jad -sjava className.class

it will generate .java file