method efficiency

[TheWave]

We got this method as homework assignment. There should be a way to make the method do less comparisons at runtime.
(the method finds the min and max of the array)

Any help would be appreciated.

public void what() 
{ 
   int x = _arr[0]; 
   int y = _arr[0]; 
   for (int i=1; i<_arr.length; i++) 
   { 
       if (_arr[i] < x) 
           x = _arr[i]; 
       else if (_arr[i] > y) 
           y = _arr[i];                 
   } 
   System.out.println (x + "  " + y); 
}