Can I dynamically unload and reload (other versions of the same) JAR?

Question

I am writing a server program which is used to run unit tests of an API (displaying lots of information and providing web access to control / monitor the whole thing)...<

Answer 1

OSGi is a framework that will allow you to do it. JSR 277 the Java Module System is designed for doing that as well (I think). I have not followed the OSGi -vs- JSR 277 debate, so I don't know f they are trying to marge them at all.

You can roll your own with class loaders, but it'll be less "fun".