1)Download JAD software from the following link.
3)You will get a new folder which is containing jad
4)Make one .java file in the same folder.(pic2)
5)Run your .java file through the command promt.
if the name of file is Welcome.
6) A .class file will be created in the respective folder
7)Now copy this created “class file” and “jad application”.
And move to some other folder.
8) Now type
9)A “.jad ” file will be created in the same folder.
10)Then write a command
c:\jad -sjava Welcome.class
11)A class will be created in the respective folder.(pic 3)
By using the above method ,we can retrive java file through class file.