Question

I learn Delegation pattern from here: http://en.wikipedia.org/wiki/Delegation_pattern
It confused me as follow:

1. Delegation Pattern == Method Overloading / Overriding
2. Delegation Pattern == Polymorphism

Is any of above true?

Answer 1

Not really.
In a simple java example Object A has a method that turns around and calls a method on Object B. So you can say that A delegated to B.

In a complex example Object B implements Interface A but you can ask an interface A to perform a method and it will tell B to perform that method.

None of this really have much to do with polymorphism or overriding.