Learn Method Overloading in Java (With Examples)

Method overloading in Java is a feature that lets a class have more than one method with the same name, as long as their parameter lists are different. It's a form of compile-time (static) polymorphism.

Rules for Method Overloading

• Overloaded methods must have the same name but a different number, type, or order of parameters
• Return type alone cannot be used to overload a method
• Overloaded methods can have different access modifiers or throw different exceptions

Example: Different Number of Parameters

class Calculator {
    int add(int a, int b) {
        return a + b;
    }
    int add(int a, int b, int c) {
        return a + b + c;
    }
}

Example: Different Parameter Types

class Printer {
    void show(int value) {
        System.out.println("Integer: " + value);
    }
    void show(String value) {
        System.out.println("String: " + value);
    }
}

Why Use Method Overloading?

• Improves code readability by using one intuitive method name for related operations
• Lets a method handle different types or numbers of inputs without renaming it
• Forms the basis of compile-time polymorphism in Java