Method Overloading In Java

1.Method Overloading:
Method Overloading means using the same method name with different parameters in the same class.

In simple words:

• Same Method Name

• Different Input

• Different Behavior

This is called Method Overloading.

Why Do We Use Method Overloading?

Without method overloading, we would write like this:

• addTwoNumbers()

• addThreeNumbers()

• addFourNumbers()

This makes the code messy and hard to maintain.

Instead, we use:

• add()

• add()

• add()

Same method name — cleaner and easier to understand.

Simple Example:

class Student {

    void add(int a, int b){
        System.out.println(a + b);
    }

    void add(int a, int b, int c){
        System.out.println(a + b + c);
    }

    public static void main(String[] args){
        Student s = new Student();

        s.add(10,20);
        s.add(10,20,30);
    }
}

Output:

30
60

Here:

• add(10,20) calls first method

• add(10,20,30) calls second method

Same method name, but different parameters.

This is Method Overloading.

Rules for Method Overloading:

Method overloading happens when:

1. Number of Parameters Changes:
- add(int a, int b)

• add(int a, int b, int c)

2. Data Type Changes:

• add(int a, int b)

• add(double a, double b)

3. Order of Parameters Changes:

• add(int a, double b)

• add(double a, int b)

Advantages of Method Overloading:

• Makes code clean

• Easy to read

• Easy to maintain

• Reduces duplicate method names

• Improves code flexibility