Get Maximum Difference Of Two Element In Array

This program calculate maximum difference between two  element of array
Example:

5,6,9,4,12,8,10,3,11

In this set of number
 difference between 12 and 3 is maximum 9


public class max_diff_in_array {

    public static void main(String[] args) {

    int arr[]={5,6,9,4,12,8,10,3,11};
    int max=0;
    int x=0,y=0;
    for (int i = 0; i < arr.length; i++) {
for (int j = i+1; j < arr.length; j++) {
   
int diff= Math.abs(arr[i]-arr[j]);
//System.out.println(diff);
           if(max<diff)
           {
            max=diff;
              x=i;
              y=j;
           }
  }
}
   
     System.out.println("max="+max+"x="+arr[x]+"y="+arr[y]);
   
   
   
   
}
}