Using JAd to decompile my java prgram

I've downloaded JAD from the Internet and now I want to decompile my .class file to the original source code.

I've been using Notepad as editor and I compile and run my Java program through Command prompt. Can anyone tell me how to use JAD to decompile the program through cmd on windows 7?

I dont just want to learn what's the output of decompilation, i also want to learn what changes

i'll have to make in Path setting and Classpath variable.

Maybe you could use JD-GUI | Java Decompiler instead of JAD.