java-不用辅助变量，两变量直接交换

import java.util.Scanner;

public class VariableExchange {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("please enter a number");
        int num1=input.nextInt();
        System.out.println("please enter other number");
        int num2=input.nextInt();
        System.out.println("Before execution num1 is:"+num1+"   "+"num2:"+num2);
        num1=num1^num2;
        num2=num2^num1;
        num1=num1^num2;
        System.out.println("Later execution num1:"+num1+"   "+"num2:"+num2);
    }
}