代码实现两个数交换方法

方法1

提供一个临时变量

public class swapInt {    public static void main(String[] agrs){        int m = 12;        int n = 5;        System.out.println("m:"+m+"  n:"+n);        int temp = m;        m = n;        n = temp;        System.out.println("m:"+m+"  n:"+n);}

方法2

缺点：当m和n较大时，有可能会出现精度损失

public class swapInt {    public static void main(String[] agrs){        int m = 12;        int n = 5;        System.out.println("m:"+m+"  n:"+n);        m = m + n; //m=12+5        n = m - n; //n=17-5        m = m - n; //m=17-12        System.out.println("m:"+m+"  n:"+n);}

方法3

优点：没有以上两种方法的缺点

public class swapInt {    public static void main(String[] agrs){        int m = 12;        int n = 5;        System.out.println("m:"+m+"  n:"+n);        m = m ^ n;        n = m ^ n;//(m^n)^n == m,相当于m值给n        m = m ^ n;//(m^n)^m == n,相当于n值给m        System.out.println("m:"+m+"  n:"+n);}

如图解释：