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Method Overloading in Java

Method Overloading in Java

Method Overloading is a feature in Java that allows a class to have multiple methods with the same name but different parameter lists. The methods can have a different number or types of parameters. The decision on which method to invoke is made by the compiler based on the arguments provided during the method call.

 Example:

public class Calculator {

    // Method to add two integers

    public int add(int a, int b) {

        return a + b;

    }


    // Method to add three integers

    public int add(int a, int b, int c) {

        return a + b + c;

    }


    // Method to add two doubles

    public double add(double a, double b) {

        return a + b;

    }


    // Method to concatenate two strings

    public String concatenate(String str1, String str2) {

        return str1 + str2;

    }

}


Method Overloading in Action:


public class Main {

    public static void main(String[] args) {

        Calculator calculator = new Calculator();


        // Overloaded methods for addition

        int sum1 = calculator.add(5, 10);

        int sum2 = calculator.add(2, 3, 5);


        // Overloaded method for addition with doubles

        double doubleSum = calculator.add(2.5, 3.7);


        // Overloaded method for string concatenation

        String result = calculator.concatenate("Hello, ", "World!");


        // Displaying Results

        System.out.println("Sum of two integers: " + sum1);

        System.out.println("Sum of three integers: " + sum2);

        System.out.println("Sum of two doubles: " + doubleSum);

        System.out.println("Concatenated string: " + result);

    }

}


In this example, the `Calculator` class demonstrates method overloading:


- Two methods for integer addition with different parameter counts.

- A method for double addition with a different parameter type.

- A method for string concatenation.


During the method calls in the `Main` class, the compiler determines the appropriate method to invoke based on the number and types of arguments passed. Method overloading enhances code readability and provides flexibility when dealing with different data types or varying numbers of parameters.

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