Java program to swap two numbers

Given below is a Java program to swap two numbers.

Code :

// Class Swap
class Swap{
    // method swap 
    void swap(int num1,int num2){
        num1 = num1 + num2;
        num2 = num1 - num2;
        num1 = num1 - num2;
        System.out.println("After swapping\nNumber 1= " + num1 + " and Number 2= "+ num2);
    }
}
// Class SwapDemo 
class SwapDemo{
    public static void main(String[] args) {
        int num1=10,num2=20;
        System.out.println("Number 1: "+num1);
        System.out.println("Number 2: "+num2);
        Swap s=new Swap();
        s.swap(num1,num2);//call to the swap method
    }
}

Output :

Number 1: 10
Number 2: 20
After swapping
Number 1= 20 and Number 2= 10

Note : Leave a comment if you feel the program is incorrect and/or has errors and/or if the program and its output don't match. Please report about broken links.