How to create an instance of a dynamically loaded class?

Question

Hi all,
I am using ASM bytecode engineering framework to generate classes dynamically. I need to instantiate the classes dynamically as well. Request all to please enlighten me on the following points :
(1) Presently I load the class using a custom class loader and then use Class.newInstance() method to obtain an instance. However, I read that reflection is slow. So is their a faster way to instantiate in this case?
(2) The name of the classes are also generated automatically. And I don't know which class will actually be instantiated at runtime. So I have to store the refernce returned by Class.newInstance() in an Object type variable. And when I wish to invoke a method / access a data member on that instance, every time I need to cast the object to the appropriate class using Class.cast(). Can anyone please suggest a more efficient way to hold the reference?
Thanks and Regards,
Vinit_J

Answer 1

Have those classes implement a particular interface, and hold the instances in references to that interface. If you're thinking "that's a bit restricting" then maybe you should re-think whether loading a class whose responsibilities are completely unknown at compile-time is as useful as you first thought it was