Is there are way to patch jar files?

Question

Suppose I sent a large jar or war file to someone. Could I later just change one small section and send that to him? Suppose I just changed one class file. I recompiled t

Answer 1

You can copy the modified .class file this way.

jar uf test.jar com\test\Test.class

If there is a logical way for you to separate out your components in individual jar files then I would create a jar file per component type. That way you will not have re-distribute everything back to the client. For example - take a look at how Spring 3 has the components separated out.