Replacing inherited final methods with jmockit

I'm trying to find a way to replace an inherited final method with my own implementation using jMockIt.

Lets say I have the following:

public class Base {
  ...
  public final int getX() {...}
}

public class Derived extends Base {
}

Is there a way that I can redefine getX() to always return 10 for example?

I tried doing something a开发者_开发技巧long the lines of this:

new Base() {
    @Mock
    public int getX() {
        return 10;
    }
};

Derived d= new Derived();

System.out.println(d.getX());

Which yields a runtime exception about jMockIt not being able to find a matching method for int getX().

I came across this thread: http://groups.google.com/group/jmockit-users/browse_thread/thread/27a282ff2bd4ad96

But I don't quite grasp the solution provided there.

Anybody able to help out?

Found a solution...looks like I just had to mock the base class and the derived instances also got updated:

...
new MockUp<Base>() {
    @Mock int getX() { return 10;}

};
Derived d = new Derived();
System.out.println(plot.getWidth());  // prints 10
...