Overloading Vs Overriding

Overloading vs Overriding

A Way of Implementing Polymorphism
Overloading

• Overloading refers to having more than one method with the same name in a class whereas overriding refers to redefining methods of the superclass in the subclass.
• The signature of the method in the subclass and superclass should be the same.
• And helps to implement polymorphism in OOPS world.

Overriding Methods

• Refers to redefining methods which have the same signature as the superclass in the subclass
• Are used to extend the functionality of the superclass methods
• Rules for overriding methods are:
  • the order of arguments of the overriding method should be identical to that of the superclass method
  • the return type of both the overridden and the overriding methods must be the same or co-variant
  • overriding method cannot be less accessible or raise more exceptions than the method it overrides