Swap without temp

Problem

Swap two integers without using a temp variable.

Solution

We will use some excellent property of XOR to solve this. If we xor two numbers then the result will give you back the original numbers when again xor ed with the other number. So if ANS=A XOR B
then ANS XOR A = B and ANS XOR B = A.

Code

public class SwapWithoutTemp
{
 public static void main(String[] args)
 {
  int a = 5;
  int b = 6;
  a = a ^ b;
  b = a ^ b;
  a = a ^ b;
  System.out.println(a);
  System.out.println(b);
 }
}