create jar file

Hi!
I'm using emacs (JDEE) for developing my java project. But I have 
problems to compile and creat a jar file.
These is the structure of my project:

src
  process
    (java files)
  util
    (java files)

I want to compile and create a jar file with all those java files. Can 
anybody help me? I'm a little bit lost with all jde-compile, jde-make... 
configurations.

I'm also interested in knowing how to crate a war file using JDEE.

Thanks