package coreservlets;/** Simple bean to illustrate the various forms *  of jsp:setProperty. *  <P> *  Taken from Core Servlets and JavaServer Pages 2nd Edition *  from Prentice Hall and Sun Microsystems Press, *  http://www.coreservlets.com/. *  &copy; 2003 Marty Hall; may be freely used or adapted. */public class SaleEntry {  private String itemID = "unknown";  private double discountCode = 1.0;  private int numItems = 0;  public String getItemID() {    return(itemID);  }  public void setItemID(String itemID) {    if (itemID != null) {      this.itemID = itemID;    } else {      this.itemID = "unknown";    }  }  public double getDiscountCode() {    return(discountCode);  }  public void setDiscountCode(double discountCode) {    this.discountCode = discountCode;  }  public int getNumItems() {    return(numItems);  }  public void setNumItems(int numItems) {    this.numItems = numItems;  }    // In real life, replace this with database lookup.  // See Chapters 17 and 18 for info on accessing databases  // from servlets and JSP pages.    public double getItemCost() {    double cost;    if (itemID.equals("a1234")) {      cost = 12.99*getDiscountCode();    } else {      cost = -9999;    }    return(roundToPennies(cost));  }  private double roundToPennies(double cost) {    return(Math.floor(cost*100)/100.0);  }  public double getTotalCost() {    return(getItemCost() * getNumItems());  }}