java练习：位运算符的巧妙运用

//练习
class TestExer{
    public static void main(String[] args){
        int m =12;
        int n =5;
        System.out.println("m:"+m+"n:"+n);
        //交换mn的位置  方法一
        /*
        int temp = n;
            n= m;
            m =temp;
        System.out.println("m:"+m+"n:"+n);
        */
        //方法二
        /*
        m = m + n;
        n = m -n;
        m = m - n;
        System.out.println("m:"+m+"n:"+n);
        */
        //方法三
        m = m ^ n;//(12 ^ 5 )^ 5 == 12
        n = m ^ n;//(12 ^ 5 ) ^ 12 == 5
        m = m ^ n;//(12 ^ 5 ) ^ 5 == 12
        System.out.println("m:"+m+"n:"+n);

    }
}