Java Puzzlers笔记--puzzle 7: Swap Meat ^符号问题

public class CleverSwap{ public static void main(String[] args){  int x = 1984;  int y = 2001;  x ^= y ^=x ^= y;  System.out.println("x= " + x + "; y = " + y); }}

Solution: 显示：x = 0; y = 1984; 要使用中间变量TID: Swap variables without a temporary - Don't do this; operands of operators are evaluated from left to right; Do not assign to the same variable more than once in a single expression; avoid clever programming tricks;

Correctly: int tmp1 = x; int tmp2 = y; int tmp3 = x^y; x = tmp3; y = tmp2 ^ tmp3; x = tmp1 ^ y;