Find max difference two elements

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2. /*
3.  * Q2. Given an array arr[] of integers, find out the maximum difference between any
4.  * two elements such that larger element appears after the smaller number in arr[].
5.  * Print the indices of the two elements also.
6.  * Example: If array is [2, 3, 10, 6, 4, 8, 1] then returned value should be 8 (difference between 10 and 2).
7.  * If array is [ 7, 9, 5, 6, 3, 2 ] then returned value should be 2 (difference between 7 and 9).
8.  */
9. public class MaxDifferenceTwoElement {
11.     public static void main(String[] args) {
12.         int[] array = {7, 9, 5, 6, 3, 2};
13.         findMaxDifference(array);
14.     }
17.     public static void findMaxDifference(int[] array){
18.         if(array==null){
19.             return;
20.         }
21.         int min_pos = 0;    //position of min value
22.         int max_pos = 0;    //position of max value
23.         int max_gap = Integer.MIN_VALUE;
24.         for(int i=1;i<array.length;i++){
25.             if(array[i]-array[min_pos]>max_gap){
26.                 max_pos = i;
27.                 max_gap = array[i] – array[min_pos];
28.             }
29.             else if(array[i]<min_pos){
30.                 min_pos = i;
31.             }
32.         }
33.         System.out.println(max_gap);
34.     }
35. }