      1  /**

      2     This class demonstrates the tree class.

      3  */

      4  public class TreeDemo

      5  {

      6     public static void main(String[] args)

      7     {

      8        Tree t1 = new Tree("Anne");

      9        Tree t2 = new Tree("Peter");

     10        t1.addSubtree(t2);

     11        Tree t3 = new Tree("Zara");

     12        t1.addSubtree(t3);

     13        Tree t4 = new Tree("Savannah");

     14        t2.addSubtree(t4);

     15        System.out.println("Size: " + t1.size());

     16     }

     17  }