How to swap two numbers without using temporary variable?

Swap two numbers without using temp variable?

package com.coding.core;

public class SwapTwoNumbers {

public static void main(String[] args) {

// TODO Auto-generated method stub

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);

}

}