Using a null object as a list terminator

NullObjectListTerminator.java

interface INode<T> {
  boolean hasNext();
  Node<T> getNext();
  T getValue();
}

class Node<T> implements INode<T> {
  private T value;
  private INode<T> next;

  public Node(T value) {
    this.value = value;
  }

  public boolean hasNext() {
    return true;
  }

  public Node<T> getNext() {
    return this.next;
  }

  public T getValue() {
    return value;
  }
}

class TerminatorNode<T> implements INode<T> {
  public boolean hasNext() {
    return false;
  }

  public Node<T> getNext() {
    return this;
  }

  public T getValue() {
    return null;
  }
}

class List<T> {
  private Node<T> start;

  public List() {
    this.start = new TerminatorNode<T>()
  }

  public Node<T> get(int index) {
    int counter = 0;

    for (INode n = start; n.hasNext(); n = n.getNext()) {
      if (counter == index) {
        return n.getValue();
      }

      counter ++;
    }

    return null;
  }
}