public class RotateArray {

public static void main(String[] args) {

Solution solution = new Solution();

int[] arr = new int[] {1,2,3,4,5,6,7};

solution.rotate(arr , 3);

for (int i = 0; i < arr.length; i++) {

System.out.print(arr[i]);

}

}

static class Solution {

public void rotate(int[] nums, int k) {

if(nums != null || nums.length == 0) return;

k = k % nums.length;

for(int i = 1; i <= k; i++) {

int last = nums[nums.length - 1];

for(int j = nums.length - 1; j >=0 ; j--) {

nums[j] = nums[j-1];

}

nums[0] = last;

}

}

}

}