What is method overloading and method overriding in Java with example?
Method overloading deals with the notion of having two or more methods in the same class with the same name but different arguments.
In case of method overloading, parameter must be different. In case of method overriding, parameter must be same.
Method overriding means having two methods with the same arguments, but different implementations. One of them would exist in the parent class, while another will be in the derived, or child class.
In java, method overloading can’t be performed by changing return type of the method only. Return type can be same or different in method overloading. But you must have to change the parameter. Return type must be same or covariant in method overriding.
Method Overloading and Method Overriding in JAVA
Overloading V/S Overriding in JAVA
- Overloading – Private, static and final methods can be overloaded.
- Overriding – Private, static and final methods can not be override.
- Overloading – Access modifiers point of view no restriction.
Overriding – Access modifiers point of view not reduced scope of Access modifiers but increased.
- Overloading – Also known as compile time polymorphism or static polymorphism or early binding.
- Overriding – Also known as run time polymorphism or dynamic polymorphism or late binding.
- Overloading – Overloading can be exhibited both are method and constructor level.
- Overriding – Overriding can be exhibited only at method label.
- Overloading – The scope of overloading is within the class.
- Overriding – The scope of Overriding is base class and derived class.
- Overloading – Overloading can be done at both static and non-static methods.
- Overriding – Overriding can be done only at non-static method.
- Overloading – It is used to increase the readability of the program.
- Overriding – It is used to provide the specific implementation of the method that is already provided by its super class.
- Overloading – It is performed within class.
- Overriding – It occurs in two classes that have IS-A (inheritance) relationship.
- Overloading – It is the example of compile time polymorphism.
- Overriding – It is the example of compile run polymorphism.
- Overloading – For overloading methods return type may or may not be same.
- Overriding – For overriding method return type should be same.