dynamic-class-creation

I want to unit test my code which will have to create a .java file compile it and then the corresponding .class file should be created. How can I create the test to see if the ".class" file is created? I have added test already for its existence, now I'm trying to test the file is a valid class file. I tried try { Class.forName("Hello"); throw AssertError(); } catch( ClassNotFoundException e ) { } program.createClass(); Class.forName("Hello"); But I don't really know how to dynamically add the path where the file is created to the classpath. EDIT URL Class loaded does the work. This is how my

Does anyone know how to use Java for Strong code mobility ? Have you ever done it before? Here's what I try to achieve. Suppose we have 2 separate Java applications that communicate over network. App A and App B. App A has a class x instantiated as an object, and has been using it. App B has no prior knowledge of this class x. App A needs to migrate the instance of class x over to App B. App B should be able to dynamically load class x, and retains the state of class x. I have Googled around and found a bunch of resources on how to dynamically load class at run-time. However, I'm not sure if