1  public class TreeTester

  2  {

  3     public static void main(String[] args)

  4     {

  5        BinarySearchTree<String> names = new BinarySearchTree<String>();

  6        names.add("Romeo");

  7        names.add("Juliet");

  8        names.add("Tom");

  9        names.add("Dick");

 10        names.add("Harry");

 11  

 12        class PrintVisitor implements Visitor<String>

 13        {

 14           public void visit(String data)

 15           {

 16              System.out.print(data + " ");

 17           }

 18        }

 19     

 20        names.inorder(new PrintVisitor());

 21        System.out.println();

 22  

 23        System.out.println("Expected: Dick Harry Juliet Romeo Tom");

 24     }

 25  }