java交换两个数的位置不用第三个变量

int x = 10;
int y = 15;
System.out.println("x="+x+" y="+y);
x = x+y;
//x= 10+15=25
y = x-y;
//y= 25-15=10
x = x-y;
//x= 25-10=15
System.out.println("x="+x+" y="+y);
结果：
x=10 y=15
x=15 y=10

https://blog.youkuaiyun.com/qq_37939251/article/details/83068606