Swap2.java

import java.util.Scanner; // for user input

public class Swap2 {

    /**
    *   Program :   Swap2.java
    *   Purpose :   Swap two numbers, without using a third variable
    *   Creator :   Chris Clarke
    *   Created :   14.06.2013
    */

    public static void main(String[] args) {

        int x, y;

        Scanner scan = new Scanner(System.in);

        System.out.print("Enter value for x: ");
        x = scan.nextInt();

        System.out.print("Enter value for y: ");
        y = scan.nextInt();

        x += y;
        y  = x-y;
        x -= y;

        System.out.println("Swapped! x is now "+x);
        System.out.println("and y is now "+y);
    }//end main

}//end class