Method Overloading vs Method Overriding

In this post, we will learn the difference between Method Overloading and Method Overriding in Java. This is a frequently asked question in Java interviews for beginners. Let's dive into it.

Difference between Method Overloading and Method Overriding in Java

Features Method Overloading Method Overriding
Definition When a class has more than one method with the same name but with different arguments, then it's called method overloading. When a superclass method is modified in the subclass, then it's called method overriding.
Method Signatures Overloaded methods must differ in number of arguments, types of arguments, or order of arguments. But, they must have the same name. Overridden methods must have the same method signature. You must not change the method name, types of arguments, number of arguments, and order of arguments while overriding a superclass method.
Return Types Overloaded methods can have the same or different return types. The return type of the overridden method must be compatible with that of the superclass method. If the superclass method has a primitive type as its return type, then it must be overridden with the same return type. If the superclass method has a derived type as its return type then it must be overridden with the same type or its subclass type.
Visibility Overloaded methods can have the same visibility or different visibility. While overriding a superclass method either you can keep the same visibility or you can increase the visibility. But you can’t reduce it.
Static Methods Overloaded methods can be static or not static. It does not affect the method overloading. You can’t override a static method.
Binding Binding between method call and method definition happens at compile time (Static Binding). Binding between method call and method definition happens at run time (Dynamic Binding).
Polymorphism It shows static polymorphism. It shows dynamic polymorphism.
Private Methods Private methods can be overloaded. Private methods can’t be overridden.
Final Methods Final methods can be overloaded. Final methods can’t be overridden.
Required Classes For method overloading, only one class is required. Method overloading happens within a class. For method overriding, two classes are required – superclass and subclass. That means method overriding happens between two classes.


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