//
//   This file contains the Java code from Program 4.16 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in Java"
//   by Bruno R. Preiss.
//
//   Copyright (c) 1998 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.pads.uwaterloo.ca/Bruno.Preiss/books/opus5/programs/pgm04_16.txt
//
public class LinkedList
{
    protected Element head;
    protected Element tail;

    public Element getHead ()
	{ return head; }
    
    public Element getTail ()
	{ return tail; }
    
    public boolean isEmpty ()
	{ return head == null; }
    // ...
}