Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.

9.4 An On Line Store Using a Shopping Cart and Session Tracking

225

Listing 9.8 ItemOrder.java (continued)

  public void incrementNumItems() {

    setNumItems(getNumItems() + 1);

  }

  public void cancelOrder() {

    setNumItems(0);

  }

  public double getTotalCost() {

    return(getNumItems() * getUnitCost());

  }

}

Listing 9.9 Catalog.java 

package coreservlets;

/** A catalog listing the items available in inventory. */

public class Catalog {

  // This would come from a database in real life

  private static Item[] items =

    { new Item("hall001",

               "Core Servlets and JavaServer Pages " +

                 " by Marty Hall",

               "The definitive reference on servlets " +

                 "and JSP from Prentice Hall and \n" +

                 "Sun Microsystems Press. Nominated for " +

                 "the Nobel Prize in Literature.",

               39.95),

      new Item("hall002",

               "Core Web Programming, Java2 Edition " +

                 "by Marty Hall, Larry Brown, and " +

                 "Paul McNamee",

               "One stop shopping for the Web programmer. " +

                 "Topics include \n" +

                 "
Thorough coverage of Java 2; " +

                 "including Threads, Networking, Swing, \n" +

                 "Java2D, and Collections\n" +

                 "
A fast introduction to HTML 4.01, " +

                 "including frames, style sheets, layers,\n" +

                 "and Netscape and Internet Explorer " +

                 "extensions.\n" +

                 "
A fast introduction to HTTP 1.1, " +

                 "servlets, and JavaServer Pages.\n" +

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.