Java Interview Program to Swap two numbers without using third variable in java

1. public class SwapTwoNumbers {
2.  
3. public static void main(String[] args) {
4.  
5. int number1=20;
6. int number2=30;
7.  
8. System.out.println("Before Swapping");
9. System.out.println("Value of number1 is :" + number1);
10. System.out.println("Value of number2 is :" +number2); 
11.  
12. number1=number1+number2;
13. number2=number1-number2;
14. number1=number1-number2;
15.  
16. System.out.println("After Swapping");
17. System.out.println("Value of number1 is :" + number1);
18. System.out.println("Value of number2 is :" +number2);
19.  
20. }
21. }

1. public class SwapTwoNumbers {
2.  
3. public static void main(String[] args) {
4.  
5. int number1=2;
6. int number2=4;
7.  
8. System.out.println("Before Swapping");
9. System.out.println("Value of number1 is :" + number1);
10. System.out.println("Value of number2 is :" +number2); 
11.  
12. number1=number1^number2;
13. number2=number1^number2;
14. number1=number1^number2;
15.  
16. System.out.println("After Swapping");
17. System.out.println("Value of number1 is :" + number1);
18. System.out.println("Value of number2 is :" +number2);
19.  
20. }
21. }