Compiling Class files

Hey, totally new to Java. How would i go about compiling .class or .jad files into .jar? What software do i require too? Thanks in advance

[JamesCherrill]

Start here: http://www.daniweb.com/software-development/java/threads/99132

[stultuske]

to add to the above: don't think you'll speed up by skipping what you think look like 'too basic', since you're post makes it clear you 're not all too familiar with the basics.

[DavidKroukamp]

unless doing mobile development, I've never seen the *.jad extension used in any java application native to windows, if you already have a class file and wondering how to make it a jar file(double click and it runs) check here:http://docs.oracle.com/javase/tutorial/security/toolsign/step2.html and this:http://docs.oracle.com/javase/tutorial/deployment/jar/ and maybe here:http://www.javacoffeebreak.com/faq/faq0028.html