采用位异或方式将两个变量数值调换

package debug;

class Demo2 {
    public static void main(String[] args){
        int a = 1;
        int b = 2;
        System.out.println("a:" + a + ",b:" + b);
        
        //方法一，采用异或方法
        a = a ^ b;
        b = a ^ b;
        a = a ^ b;
        System.out.println("a:" + a + ",b:" + b);
        
        //方法二，一句话方法
        b = (a + b) - (a = b);
        System.out.println("a:" + a + ",b:" + b);
    }
}