> I downloaded  jEdit, and I have a doubt  about the compilation.
> - Can I compile  something using jEdit like Jcreator, or JEdit is only a
editor?
> - How do I compile something in jEdit?
jEdit comes VERY naked (i.e. only as an editor) as the original download. You
can
customize the whole thing very nicely (that includes support to compile code,
tools for
checking code integrity, and much more...).

Open jEdit and go to: Plugins->Plugin Manager. You can download a list of
available
plugins, select the ones you want and install them. Don't get too many at first,
cause the
mass of settings will be too much in one go...