1  public class TestBSTWithIterator {
  2    public static void main(String[] args) {
  3      BST<String> tree = new BST<>();
  4      tree.insert("Green");
  5      tree.insert("Mabel");
  6      tree.insert("Teal");
  7      tree.insert("Blue");
  8      tree.insert("Jade");
  9      tree.insert("Purple");
 10      tree.insert("Danube");
 11      
 12      for (String s: tree) // Use a foreach loop
 13        System.out.print(s.toUpperCase() + " ");
 14    }
 15  }