java不开辟新空间的交换两个数

package com.lina.util;

import java.util.Arrays;

import java.util.Scanner;

public class Arraylists {

public static void main(String[] args) {

getchange1();

getchange2();

getchange3();

getchange4();

getchange5();

}

//交换位置的方法

public static  void getchange1(){

int x=3,y=9;

x=x^y;

y=x^y;

x=x^y;

System.out.println("getchange1:x="+x+";y="+y);

}

//加减法

public static void getchange2(){

int x=3,y=9;

x=x+y;

y=x-y;

x=x-y;

System.out.println("getchange2:x="+x+";y="+y);

}

public static void getchange3(){

int x=3,y=9;

x=x-y;

y=x+y;

x=y-x;

System.out.println("getchange3:x="+x+";y="+y);

}

//乘除法

public static void getchange4(){

int x=3,y=9;

x=x*y;

y=x/y;

x=x/y;

System.out.println("getchange4:x="+x+";y="+y);

}

}

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输出：

getchange1:x=9;y=3

getchange2:x=9;y=3

getchange3:x=9;y=3

getchange4:x=9;y=3