交换两个变量的值的几种方式

//精简,一行代码搞定  int x = 3, y = 7;  System.out.printf("x = %d, y = %d\n", x, y);  x = y + 0 * (y = x);  System.out.printf("x = %d, y = %d\n", x, y);    //兼容,支持Integer.MAXVALUE的+操作  int a = 5, b = 2;  System.out.printf("a = %d, b = %d\n", a, b);  a ^= b;  b ^= a;  a ^= b;  System.out.printf("a = %d, b = %d\n", a, b);    //明了  int p = 4, q = 9;  System.out.printf("p = %d, q = %d\n", p, q);  p = p + q;  q = p - q;  p = p - q;  System.out.printf("p = %d, q = %d\n", p, q);    //⊙﹏⊙b汗,产生中间变量浪费空间,但是大部分人是用这个吧...  int u = 8, v = 6;  System.out.printf("u = %d, v = %d\n", u, v);  int temp = u;  u = v;  v = temp;  System.out.printf("u = %d, v = %d\n", u, v);