(LintCode) No 5: Swap Two Integers in Array

题目描述：交换一个数列中两个数字的位置。

代码如下：

public class Solution {
    /**
     * @param A: An integer array
     * @param index1: the first index
     * @param index2: the second index
     * @return: nothing
     */
    public void swapIntegers(int[] A, int index1, int index2) {
        int n;
        n = A[index1];
        A[index1] = A[index2];
        A[index2] = n;// write your code here
    }
}