实现两个变量值的互换

import java.util.Scanner;
     /*.................
       public static void main(String[] args)
       {
               Scanner scan = new Scanner(System.in);
                System.out.println("请输入变量A的值")；
               long A = scan.nextLong();
               System.out.println("请输入变量B的值")；
               long A = scan.nextLong();
               A = A^B;
               B = B^A;
               A = A^B;
               System.out.println("A = "+A+"B"+B)；
       }