Swapping of Two Numbers without Using Temp Variable

package Logs;

public class Swapping {

    public static void main(String a[]){
        int x = 10;
        int y = 20;
        System.out.println("Before swap:");
        System.out.println("x value: "+x);
        System.out.println("y value: "+y);
        x = x+y;
        y=x-y;
        x=x-y;
        System.out.println("After swap:");
        System.out.println("x value: "+x);
        System.out.println("y value: "+y);
    }
}

OutPut:

Before swap:
x value: 10
y value: 20
After swap:
x value: 20

y value: 10