Rotate an array of n elements to the right by k steps.
For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4].
解题思路：
JAVA实现如下：
public void rotate(int[] nums, int k) {
k%=nums.length;
k=nums.length-k;
int[] nums2=new int[k];
for(int i=0;i<k;i++)
nums2[i]=nums[i];
for(int i=0;i<nums.length-k;i++)
nums[i]=nums[i+k];
for(int i=0;i<k;i++)
nums[nums.length-k+i]=nums2[i];
}
Java for LeetCode 189 Rotate Array
原文：http://www.cnblogs.com/tonyluis/p/4557341.html