Java变量之间的相互交换

1.增加临时变量

		int a = 5;
		int b = 10;
		int temp = 0;
		temp=a;
		a=b;
		b=temp;

2.位移运算交换

		int x = 5;
		int y = 10;
		x=x^y;
		y=x^y;
		x=x^y;

3.数值相加减交换

		int x = 5;
		int y = 10;
		x=x+y;//15
		y=x-y;//5
		x=x-y;//10