// 交换m和n的值
int m = 10;
int n = 7;
System.out.println("m:" + m + ", n: " + n);
// 方法一,缺点,需要新增临时变量,消耗内存
int temp = m;
m = n;
n = temp;
System.out.println("m:" + m + ", n: " + n);
// 方法二,缺点,当m和n较大时,m+n可能会溢出,导致精度损失
m = m + n;
n = m - n;
m = m - n;
System.out.println("m:" + m + ", n: " + n);
// 方法三,没有方法一和二的缺点
m = m ^ n;
n = m ^ n;
m = m ^ n;
System.out.println("m:" + m + ", n: " + n);