Question

I’m having trouble to find how to typecast the dynamically created class while using reflection.

String s;
...
Class unknownClass = Class.forName(s); 
Constructor defaultConstructor = unknownClass.getConstructor(null);

Object retobj = defaultConstructor.newInstance(null);
retobj.Writeout(); // This won't work since; 

The object class does not have a method called Writeout, but that is the name of the method which is shared by nine other possible classes that is dynamically created here (needless to say every Writeout method does a seperate thing). Any suggestions ? Thx in advance for your time.

Answer 1

Use reflection Luke…

Method writeOutMethod = unknownClass.getMethod("Writeout", new Class[]{});
writeOutMethod.invoke(retobj, new Object[]{});

Or, ensure that your objects implement a well known interface (the clean approach).