数值交换

数组

public class Swap3
{
    public static void swap(int[] i)
    {
        int temp = i[0];
        i[0] = i[1];
        i[1] = temp;
    }

    public static void main(String[] args)
    {
        int[] i = {1, 2};

        swap(i);

        System.out.println(i[0]);
        System.out.println(i[1]);
    }
}