Inheritance

Hiding Member Variables

The member variables defined in the subclass hide member variables of the same name in the superclass. One interesting feature of Java member variables is that a class can access a hidden member variable through its superclass.   Consider this superclass and subclass pair:   class Super { Number aNumber; } class Sub extends Super { Float aNumber; }   The aNumber variable in Sub hides aNumber in Super. But we can access aNumber from the superclass with:   super.aNumber super is a Java language keyword that allows a method to refer to hidden variables and overriden methods of the superclass.