Method overloading:

what is method overloading:

If a class has multiple methods having same name but different in parameters, it is known as Method Overloading.

If we have to perform only one operation, having same name of the methods increases the readability of the program.

Advantage of method overloading

Method overloading increases the readability of the program.

Different ways to overload the method

There are two ways to overload the method in java

1. By changing number of arguments
2. By changing the data type

1) Method Overloading: changing no. of arguments

In this example, we have created two methods, first add() method performs addition of two numbers and second add method performs addition of three numbers.

In this example, we are creating static methods so that we don’t need to create instance for calling method.

    class Adder{  
    static int add(int a,int b){return a+b;}  
    static int add(int a,int b,int c){return a+b+c;}  
    }  
    class TestOverloading1{  
    public static void main(String[] args){  
    System.out.println(Adder.add(11,11));  
    System.out.println(Adder.add(11,11,11));  
    }}  

Output:

22
33

2) Method Overloading: changing data type of arguments

In this example, we have created two methods that differs in data type. The first add method receives two integer arguments and second add method receives two double arguments.

    class Adder{  
    static int add(int a, int b){return a+b;}  
    static double add(double a, double b){return a+b;}  
    }  
    class TestOverloading2{  
    public static void main(String[] args){  
    System.out.println(Adder.add(11,11));  
    System.out.println(Adder.add(12.3,12.6));  
    }}  

Output:

22
24.9