Find the second max number in a given array.

 public class Solution {

     /**

      * @param nums: An integer array.

      * @return: The second max number in the array.

      */

     public int secondMax(int[] nums) {

         int first = Math.max(nums[0], nums[1]);

         int second = Math.min(nums[0], nums[1]);  

         for (int i = 2; i < nums.length; i++) {

             if (nums[i] > first) {

                 second = first;

                 first = nums[i];

             } else if (nums[i] > second) {

                 second = nums[i];

             }

         }

         return second;

     }

 }