Swap two variables using third variable !

1. public class SwapTwoNumberWithThirdVariable {
2. public static void main(String[] args) {
3. int a = 10;
4. int b = 20;
5. 
   
6. int temp;
7. temp = a;
8. a = b;
9. b = temp;
10. System.out.println("after swap value of a: " + a);
11. System.out.println("after swap value of b: " + b);
12. }
13. }

Output: 

after swap value of a: 20

after swap value of b: 10