Java upcasting question

Question

When a subclass is upcasted into it's superclass, does the overriden method and other method not defined in the superclass definition gets removed?

Answer 1

Upcasting wonn't change the object itself only your view how you look at it. So, in a way yes you won't be able to see the methods or properties specific to the subclass. However, nothing holds you back from casting back.

Answer 2

Important to note that even if you upcast an object the overriden methods from the subclass will be executed! This is called late binding and it's determined at runtime - it's a very powerfull feature of Java.