Difference Between Overloading and Overriding in Java

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Difference Between Overloading and Overriding in Java: In OOP or object-oriented programming, Java programming language is known to be very efficient. Java helps in simplifying various complicated programs. Overloading and overriding are the important concepts of the Java programming language and are used for the implementation of polymorphism. 

Polymorphism is the availability of two morphs in the same category. Here we will first discuss what is overloading method and overriding method in Java thereafter we will see the difference between overloading and overriding based on various aspects. 

Difference Between Overloading and Overriding in Java

In the table provided below, we have mentioned the difference between overloading and overriding in the Java programming language based on the various factors.

Key Differences Between Overloading and Overriding in Java

Method Overriding Method Overloading
Overriding of the already given method by the parent class. The readability of the program is enhanced.
Overriding needs the same parameters to execute the function call. In this, parameters must be different.
Runtime polymorphism. Compile-time polymorphism. 
Multiple class performance. Same class performance of the method.
It occurs between subclass or superclass. Occur in the same class.
It is used to provide better performance. Does not provide as good of the performance as overriding.

What is Method Overloading in Java?

Method overloading in Java is used to allow polymorphism on the basis of argument or argument types. It is also known or related to compile-time polymorphism. This return type can not be overloaded. Static methods can be overloaded but arguments shall be different. 

Overloading in Java can not be done if the difference between them is the static keyword only. Two methods with different parameters can be overloaded in Java. It is used because it saves the effort of using the same function without defining it over and over again. 

What is Method Overriding in Java?

It is also another method to allow polymorphism in the Java programming language.  It is used when the parent class or base class already provided the method and we want to implement that method again by overriding it. 

A child class calls method will override the parent class method if it is again called the method. In the final method, overriding in Java programming language is not supported. 

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