Swapping of Two Numbers in Java

1.Swapping with using third variable : -

package com.tutorial4u;

public class SwapTwoNumber {

       public static void main(String[] args) {

             int n1 = 4;

             int n2 = 5;

             int temp;

             System.out.println("Before swapping n1 = "+n1+" and n2 = "+n2);

             temp = n1;

             n1 = n2;

             n2 = temp;

             System.out.println("After swapping n1 = "+n1+" and n2 = "+n2);

       }

}

Output :

Before swapping n1 = 4 and n2 = 5

After swapping n1 = 5 and n2 = 4

2.Swapping without using third variable :-

package com.tutorial4u;

public class SwapTwoNumber {

       public static void main(String[] args) {

             int n1 = 4;

             int n2 = 5;

             int temp;

             System.out.println("Before swapping n1 = "+n1+" and n2 = "+n2);

             n1 = n1+n2;

             n1 = n1-n2;

             n2 = n1=n2;

             System.out.println("After swapping n1 = "+n1+" and n2 = "+n2);

       }

}

Output :

Before swapping n1 = 4 and n2 = 5

After swapping n1 = 5 and n2 = 4