1  import java.util.Arrays;

  2  

  3  /**

  4     This program demonstrates the heapsort algorithm.

  5  */

  6  public class HeapSortDemo

  7  {  

  8     public static void main(String[] args)

  9     {  

 10        int[] a = ArrayUtil.randomIntArray(20, 100);

 11        System.out.println(Arrays.toString(a));

 12        HeapSorter.sort(a);

 13        System.out.println(Arrays.toString(a));

 14     }

 15  }