用异或运算符简化两个变量值得互换

源码：

package oneday01;
 
import java.util.Scanner;
 
public class ExchangeValue {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		System.out.println("请输入A的值： ");
		long A = scan.nextLong();
		System.out.println("请输入B的值：");
		long B = scan.nextLong();
		System.out.println("A = " + A + "\tB = " + B);
		A = A ^ B;
		B = B ^ A;
		A = A ^ B;
		System.out.println("A = " + A + "\tB = " + B);
	}
}

运行结果如下：

其中下面的代码就是运用了异或运算符即  “^”：

        A = A ^ B;
		B = B ^ A;
		A = A ^ B;
		System.out.println("A = " + A + "\tB = " + B);

下面给大家详细解析一下：

1、a＝a^b

2、b＝(a^b)^b=a^(b^b)=a^1=a

3、a=a^b=(a^b)^a=(a^a)^b=1^b=b