// // This file contains the Java code from Program 5.9 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/pgm05_09.txt // public abstract class AbstractContainer extends AbstractObject implements Container { protected int count; public int getCount () { return count; } public boolean isEmpty () { return getCount () == 0; } public boolean isFull () { return false; } // ... }