.class dependecy

Hi, is there any way to see the class-hirarcy of one specified .class file ? I.e. if I wanted to see on which classes JPanel relies on.
I'm trying to extract out of swinall.jar those classes I will need to be able to use JPanel, JSlider and JPopupMenu in my applet. It is to much to have to download all of swingall.jar!

With regards,
Svb

I suggest if ur using netscape navigator,the open the java console and set debug level >2 and u will see classes that are downloaded to the client.This will help u to know the dependent class files