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Method Overloading in Java allows multiple methods in the same class to share the same name but differ in their parameter list (number, type, or order of parameters). This enables compile-time polymorphism where the compiler determines which method to invoke based on the arguments passed.
Overloading cannot be achieved by changing only the return type — the parameters must differ.
Example – Changing Number of Parameters
class Product {public int multiply(int a, int b) {return a * b;}public int multiply(int a, int b, int c) {return a * b * c;}}public class Main {public static void main(String[] args) {Product p = new Product();System.out.println(p.multiply(2, 3)); // 6System.out.println(p.multiply(2, 3, 4)); // 24}}コピーしました。✕コピーHere, the compiler selects the method based on the argument count.
Example – Changing Data Types of Parameters
Java Method Overloading - W3Schools
Instead of defining two methods that should do the same thing, it is better to overload one. In the example below, we overload the plusMethod method to work for both int and double:
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