GUI咖啡系统的完整代码

目录结构

• Coffee
• CoffeeBrewer
• Product
• Order
• OrderItem
• Sales
• SalesFormatter
• Catalog
• CatalogLoader
• FileCatalogLoader
• DataFormatException
• PlainTextSalesFormatter
• HTMLSalesFormatter

• XMLSalesFormatter

• GourmetCoffeeGUI （仅需提交这个类）

系统使用的catalog.dat文件在压缩包内

Coffee

import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Coffee extends Product {
    private String origin;
    private String roast;
    private String flavor;
    private String aroma;
    private String acidity;
    private String body;

    public Coffee(String var1, String var2, double var3, String var5, String var6, String var7, String var8, String var9, String var10) {
        super(var1, var2, var3);
        this.origin = var5;
        this.roast = var6;
        this.flavor = var7;
        this.aroma = var8;
        this.acidity = var9;
        this.body = var10;
    }

    public String getOrigin() {
        return this.origin;
    }

    public String getRoast() {
        return this.roast;
    }

    public String getFlavor() {
        return this.flavor;
    }

    public String getAroma() {
        return this.aroma;
    }

    public String getAcidity() {
        return this.acidity;
    }

    public String getBody() {
        return this.body;
    }

    public String toString() {
        return super.toString() + "_" + this.getOrigin() + "_" + this.getRoast() + "_" + this.getFlavor() + "_" + this.getAroma() + "_" + this.getAcidity() + "_" + this.getBody();
    }

    public JPanel getPanel() {
        JPanel var1 = new JPanel(new BorderLayout());
        JTextField var2 = new JTextField(this.getCode());
        JTextField var3 = new JTextField(this.getDescription());
        JTextField var4 = new JTextField(Double.toString(this.getPrice()));
        JTextField var5 = new JTextField(this.getOrigin());
        JTextField var6 = new JTextField(this.getRoast());
        JTextField var7 = new JTextField(this.getFlavor());
        JTextField var8 = new JTextField(this.getAroma());
        JTextField var9 = new JTextField(this.getAcidity());
        JTextField var10 = new JTextField(this.getBody());
        var2.setEditable(false);
        var3.setEditable(false);
        var4.setEditable(false);
        var5.setEditable(false);
        var6.setEditable(false);
        var7.setEditable(false);
        var8.setEditable(false);
        var9.setEditable(false);
        var10.setEditable(false);
        JPanel var11 = new JPanel(new GridLayout(9, 1));
        var11.add(new JLabel("Code:"));
        var11.add(new JLabel("Description: "));
        var11.add(new JLabel("Price:"));
        var11.add(new JLabel("Origin:"));
        var11.add(new JLabel("Roast:"));
        var11.add(new JLabel("Flavor:"));
        var11.add(new JLabel("Aroma:"));
        var11.add(new JLabel("Acidity:"));
        var11.add(new JLabel("Body:"));
        JPanel var12 = new JPanel(new GridLayout(9, 1));
        var12.add(var2);
        var12.add(var3);
        var12.add(var4);
        var12.add(var5);
        var12.add(var6);
        var12.add(var7);
        var12.add(var8);
        var12.add(var9);
        var12.add(var10);
        var1.add(var11, "West");
        var1.add(var12, "East");
        return var1;
    }
}

CoffeeBrewer

import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class CoffeeBrewer extends Product {
    private String model;
    private String waterSupply;
    private int numberOfCups;

    public CoffeeBrewer(String var1, String var2, double var3, String var5, String var6, int var7) {
        super(var1, var2, var3);
        this.model = var5;
        this.waterSupply = var6;
        this.numberOfCups = var7;
    }

    public String getModel() {
        return this.model;
    }

    public String getWaterSupply() {
        return this.waterSupply;
    }

    public int getNumberOfCups() {
        return this.numberOfCups;
    }

    public String toString() {
        return super.toString() + "_" + this.getModel() + "_" + this.getWaterSupply() + "_" + this.getNumberOfCups();
    }

    public JPanel getPanel() {
        JPanel var1 = new JPanel(new BorderLayout());
        JTextField var2 = new JTextField(this.getCode());
        JTextField var3 = new JTextField(this.getDescription());
        JTextField var4 = new JTextField(Double.toString(this.getPrice()));
        JTextField var5 = new JTextField(this.getModel());
        JTextField var6 = new JTextField(this.getWaterSupply());
        JTextField var7 = new JTextField(Integer.toString(this.getNumberOfCups()));
        var2.setEditable(false);
        var3.setEditable(false);
        var4.setEditable(false);
        var5.setEditable(false);
        var6.setEditable(false);
        var7.setEditable(false);
        JPanel var8 = new JPanel(new GridLayout(6, 1));
        var8.add(new JLabel("Code:"));
        var8.add(new JLabel("Description: "));
        var8.add(new JLabel("Price:"));
        var8.add(new JLabel("Model:"));
        var8.add(new JLabel("Water supply:"));
        var8.add(new JLabel("Number of cups:"));
        JPanel var9 = new JPanel(new GridLayout(6, 1));
        var9.add(var2);
        var9.add(var3);
        var9.add(var4);
        var9.add(var5);
        var9.add(var6);
        var9.add(var7);
        var1.add(var8, "West");
        var1.add(var9, "Center");
        return var1;
    }
}

Product

import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Product {
    private String code;
    private String description;
    private double price;

    public Product(String var1, String var2, double var3) {
        this.code = var1;
        this.description = var2;
        this.price = var3;
    }

    public String getCode() {
        return this.code;
    }

    public String getDescription() {
        return this.description;
    }

    public double getPrice() {
        return this.price;
    }

    public boolean equals(Object var1) {
        return var1 instanceof Product && this.getCode().equals(((Product)var1).getCode());
    }

    public String toString() {
        return this.getCode() + "_" + this.getDescription() + "_" + this.getPrice();
    }

    public JPanel getPanel() {
        JPanel var1 = new JPanel(new BorderLayout());
        JTextField var2 = new JTextField(this.getCode());
        JTextField var3 = new JTextField(this.getDescription());
        JTextField var4 = new JTextField(Double.toString(this.getPrice()));
        var2.setEditable(false);
        var3.setEditable(false);
        var4.setEditable(false);
        JPanel var5 = new JPanel(new GridLayout(3, 1));
        var5.add(new JLabel("Code:"));
        var5.add(new JLabel("Description: "));
        var5.add(new JLabel("Price:"));
        JPanel var6 = new JPanel(new GridLayout(3, 1));
        var6.add(var2);
        var6.add(var3);
        var6.add(var4);
        var1.add(var5, "West");
        var1.add(var6, "Center");
        return var1;
    }
}

Order

import java.util.Iterator;
import java.util.Vector;

public class Order {
    private Vector items = new Vector();

    public Order() {
    }

    public void addItem(OrderItem var1) {
        this.items.add(var1);
    }

    public void removeItem(OrderItem var1) {
        this.items.removeElement(var1);
    }

    public Iterator getItemsIterator() {
        return this.items.iterator();
    }

    public OrderItem getItem(Product var1) {
        Iterator var2 = this.getItemsIterator();

        OrderItem var3;
        do {
            if (!var2.hasNext()) {
                return null;
            }

            var3 = (OrderItem)var2.next();
        } while(!var3.getProduct().equals(var1));

        return var3;
    }

    public int getNumberOfItems() {
        return this.items.size();
    }

    public double getTotalCost() {
        double var1 = 0.0D;

        for(Iterator var3 = this.getItemsIterator(); var3.hasNext(); var1 += ((OrderItem)var3.next()).getValue()) {
        }

        return var1;
    }

    public OrderItem[] getItems() {
        OrderItem[] var1 = new OrderItem[this.getNumberOfItems()];
        int var2 = 0;

        for(Iterator var3 = this.getItemsIterator(); var3.hasNext(); var1[var2++] = (OrderItem)var3.next()) {
        }

        return var1;
    }
}

OrderItem

public class OrderItem {
    private Product product;
    private int quantity;

    public OrderItem(Product var1, int var2) {
        this.product = var1;
        this.quantity = var2;
    }

    public Product getProduct() {
        return this.product;
    }

    public int getQuantity() {
        return this.quantity;
    }

    public void setQuantity(int var1) {
        this.quantity = var1;
    }

    public double getValue() {
        return this.getProduct().getPrice() * (double)this.getQuantity();
    }

    public String toString() {
        return this.getQuantity() + " " + this.getProduct().getCode() + " " + this.getProduct().getPrice();
    }
}

Sales

import java.util.Iterator;
import java.util.Vector;

public class Sales {
    private Vector orders = new Vector();

    public Sales() {
    }

    public void addOrder(Order var1) {
        this.orders.add(var1);
    }

    public Iterator getOrdersIterator() {
        return this.orders.iterator();
    }

    public int getNumberOfOrders() {
        return this.orders.size();
    }
}

SalesFormatter

public interface SalesFormatter {
    String formatSales(Sales var1);
}

Catalog

import java.util.Iterator;
import java.util.Vector;

public class Catalog {
    private Vector products = new Vector();

    public Catalog() {
    }

    public void addProduct(Product var1) {
        this.products.add(var1);
    }

    public Iterator getProductsIterator() {
        return this.products.iterator();
    }

    public Product getProduct(String var1) {
        Iterator var2 = this.getProductsIterator();

        Product var3;
        do {
            if (!var2.hasNext()) {
                return null;
            }

            var3 = (Product)var2.next();
        } while(!var3.getCode().equals(var1));

        return var3;
    }

    public int getNumberOfProducts() {
        return this.products.size();
    }

    public String[] getCodes() {
        String[] var1 = new String[this.getNumberOfProducts()];
        int var2 = 0;

        for(Iterator var3 = this.getProductsIterator(); var3.hasNext(); var1[var2++] = ((Product)var3.next()).getCode()) {
        }

        return var1;
    }
}

CatalogLoader

import java.io.FileNotFoundException;
import java.io.IOException;

public interface CatalogLoader {
    Catalog loadCatalog(String var1) throws FileNotFoundException, IOException, DataFormatException;
}

FileCatalogLoader

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;

public class FileCatalogLoader implements CatalogLoader {
    private static final String COFFEE_PREFIX = "Coffee";
    private static final String COFFEE_BREWER_PREFIX = "Brewer";
    private static final String PRODUCT_PREFIX = "Product";
    private static final String DELIM = "_";

    public FileCatalogLoader() {
    }

    public Catalog loadCatalog(String var1) throws FileNotFoundException, IOException, DataFormatException {
        Catalog var2 = new Catalog();
        BufferedReader var3 = new BufferedReader(new FileReader(var1));

        for(String var4 = var3.readLine(); var4 != null; var4 = var3.readLine()) {
            Object var5 = null;
            if (var4.startsWith("Brewer")) {
                var5 = this.readCoffeeBrewer(var4);
            } else if (var4.startsWith("Coffee")) {
                var5 = this.readCoffee(var4);
            } else {
                if (!var4.startsWith("Product")) {
                    throw new DataFormatException(var4);
                }

                var5 = this.readProduct(var4);
            }

            var2.addProduct((Product)var5);
        }

        return var2;
    }

    private Product readProduct(String var1) throws DataFormatException {
        StringTokenizer var2 = new StringTokenizer(var1, "_");
        if (var2.countTokens() != 4) {
            throw new DataFormatException(var1);
        } else {
            try {
                String var3 = var2.nextToken();
                return new Product(var2.nextToken(), var2.nextToken(), Double.parseDouble(var2.nextToken()));
            } catch (NumberFormatException var4) {
                throw new DataFormatException(var1);
            }
        }
    }

    private Coffee readCoffee(String var1) throws DataFormatException {
        StringTokenizer var2 = new StringTokenizer(var1, "_");
        if (var2.countTokens() != 10) {
            throw new DataFormatException(var1);
        } else {
            try {
                String var3 = var2.nextToken();
                return new Coffee(var2.nextToken(), var2.nextToken(), Double.parseDouble(var2.nextToken()), var2.nextToken(), var2.nextToken(), var2.nextToken(), var2.nextToken(), var2.nextToken(), var2.nextToken());
            } catch (NumberFormatException var4) {
                throw new DataFormatException(var1);
            }
        }
    }

    private CoffeeBrewer readCoffeeBrewer(String var1) throws DataFormatException {
        StringTokenizer var2 = new StringTokenizer(var1, "_");
        if (var2.countTokens() != 7) {
            throw new DataFormatException(var1);
        } else {
            try {
                String var3 = var2.nextToken();
                return new CoffeeBrewer(var2.nextToken(), var2.nextToken(), Double.parseDouble(var2.nextToken()), var2.nextToken(), var2.nextToken(), Integer.parseInt(var2.nextToken()));
            } catch (NumberFormatException var4) {
                throw new DataFormatException(var1);
            }
        }
    }
}

DataFormatException

public class DataFormatException extends Exception {
    public DataFormatException() {
    }

    public DataFormatException(String var1) {
        super(var1);
    }
}

PlainTextSalesFormatter

import java.util.Iterator;

public class PlainTextSalesFormatter implements SalesFormatter {
    private static final String NEW_LINE = System.getProperty("line.separator");
    private static PlainTextSalesFormatter singletonInstance = null;

    public static PlainTextSalesFormatter getSingletonInstance() {
        if (singletonInstance == null) {
            singletonInstance = new PlainTextSalesFormatter();
        }

        return singletonInstance;
    }

    private PlainTextSalesFormatter() {
    }

    public String formatSales(Sales var1) {
        String var2 = "";
        int var3 = 0;

        Order var5;
        for(Iterator var4 = var1.getOrdersIterator(); var4.hasNext(); var2 = var2 + NEW_LINE + "Total = " + var5.getTotalCost() + NEW_LINE) {
            var5 = (Order)var4.next();
            StringBuffer var10000 = (new StringBuffer()).append(var2).append("------------------------").append(NEW_LINE).append("Order ");
            ++var3;
            var2 = var10000.append(var3).append(NEW_LINE).append(NEW_LINE).toString();

            OrderItem var7;
            for(Iterator var6 = var5.getItemsIterator(); var6.hasNext(); var2 = var2 + var7.getQuantity() + " " + var7.getProduct().getCode() + " " + var7.getProduct().getPrice() + NEW_LINE) {
                var7 = (OrderItem)var6.next();
            }
        }

        return var2;
    }
}

HTMLSalesFormatter

import java.util.Iterator;

public class HTMLSalesFormatter implements SalesFormatter {
    private static final String NEW_LINE = System.getProperty("line.separator");
    private static HTMLSalesFormatter singletonInstance = null;

    public static HTMLSalesFormatter getSingletonInstance() {
        if (singletonInstance == null) {
            singletonInstance = new HTMLSalesFormatter();
        }

        return singletonInstance;
    }

    private HTMLSalesFormatter() {
    }

    public String formatSales(Sales var1) {
        String var2 = "<html>" + NEW_LINE + "  <body>" + NEW_LINE + "    <center><h2>Orders</h2></center>" + NEW_LINE;
        Iterator var3 = var1.getOrdersIterator();

        while(var3.hasNext()) {
            Order var4 = (Order)var3.next();
            var2 = var2 + "    <hr>" + NEW_LINE + "    <h4>Total = " + var4.getTotalCost() + "</h4>" + NEW_LINE;

            OrderItem var6;
            for(Iterator var5 = var4.getItemsIterator(); var5.hasNext(); var2 = var2 + "      <p>" + NEW_LINE + "        <b>code:</b> " + var6.getProduct().getCode() + "<br>" + NEW_LINE + "        <b>quantity:</b> " + var6.getQuantity() + "<br>" + NEW_LINE + "        <b>price:</b> " + var6.getProduct().getPrice() + NEW_LINE + "      </p>" + NEW_LINE) {
                var6 = (OrderItem)var5.next();
            }
        }

        var2 = var2 + "  </body>" + NEW_LINE + "</html>";
        return var2;
    }
}

XMLSalesFormatter

import java.util.Iterator;

public class XMLSalesFormatter implements SalesFormatter {
    private static final String NEW_LINE = System.getProperty("line.separator");
    private static XMLSalesFormatter singletonInstance = null;

    public static XMLSalesFormatter getSingletonInstance() {
        if (singletonInstance == null) {
            singletonInstance = new XMLSalesFormatter();
        }

        return singletonInstance;
    }

    private XMLSalesFormatter() {
    }

    public String formatSales(Sales var1) {
        String var2 = "<Sales>" + NEW_LINE;

        for(Iterator var3 = var1.getOrdersIterator(); var3.hasNext(); var2 = var2 + "  </Order>" + NEW_LINE) {
            Order var4 = (Order)var3.next();
            var2 = var2 + "  <Order total=\"" + var4.getTotalCost() + "\">" + NEW_LINE;

            OrderItem var6;
            for(Iterator var5 = var4.getItemsIterator(); var5.hasNext(); var2 = var2 + "    <OrderItem quantity=\"" + var6.getQuantity() + "\" price=\"" + var6.getProduct().getPrice() + "\">" + var6.getProduct().getCode() + "</OrderItem>" + NEW_LINE) {
                var6 = (OrderItem)var5.next();
            }
        }

        var2 = var2 + "</Sales>";
        return var2;
    }
}

GourmetCoffeeGUI

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import java.text.*;

/**
 * Gourmet Coffee System.
 *
 * @author author name
 * @version 1.1.0
 * @see Product
 * @see Coffee
 * @see CoffeeBrewer
 * @see Catalog
 * @see OrderItem
 * @see Order
 * @see Sales
 * @see CatalogLoader
 * @see FileCatalogLoader
 * @see DataFormatException
 * @see SalesFormatter
 * @see PlainTextSalesFormatter
 * @see HTMLSalesFormatter
 * @see XMLSalesFormatter
 */
@SuppressWarnings("unchecked")
public class GourmetCoffeeGUI extends JPanel {

    /* Standar error stream */
    static private PrintWriter stdErr = new PrintWriter(System.err, true);

    /* Window width in pixels */
    static private int WIDTH = 600;

    /* Window height in pixels */
    static private int HEIGHT = 530;

    /* Size of the catalog list cell in pixels */
    static private int CATALOG_CELL_SIZE = 50;

    /* Visible rows in catalog list */
    static private int CATALOG_LIST_ROWS = 14;

    /* Size of the order list cell in pixels */
    static private int ORDER_CELL_SIZE = 100;

    /* Visible rows in order list */
    static private int ORDER_LIST_ROWS = 6;

    /* Size quantity text field */
    static private int QUANTITY__TEXTFIELD_SIZE = 5;

    /* Size total text field */
    static private int TOTAL__TEXTFIELD_SIZE = 8;

    /* Rows in status text area rows */
    static private int STATUS_ROWS = 10;

    /* Rows in status text area cols */
    static private int STATUS_COLS = 40;

    private JList catalogList;
    private JList orderList;
    private JButton addModifyButton;
    private JButton removeButton;
    private JButton registerSaleButton;
    private JButton displaySalesButton;
    private JButton saveSalesButton;
    private JPanel productPanel;
    private JLabel quantityLabel;
    private JLabel totalLabel;
    private JTextField quantityTextField;
    private JTextField totalTextField;
    private JTextArea statusTextArea;
    private JRadioButton plainRadioButton;
    private JRadioButton HTMLRadioButton;
    private JRadioButton XMLRadioButton;

    private JFileChooser fileChooser;

    private Catalog catalog;
    private Order currentOrder;
    private Sales sales;
    private SalesFormatter salesFormatter;
    private NumberFormat dollarFormatter;

    /**
     * Loads a product catalog and starts the application.
     *
     * @param args String arguments.  Not used.
     * @throws IOException if there are errors in the loading the catalog.
     */
    public static void main(String[] args) throws IOException {

        String filename = "";

        if (args.length != 1) {
            filename = "catalog.dat";
        } else {
            filename = args[0];
        }
        try {
            Catalog catalog = (new FileCatalogLoader()).loadCatalog(filename);

            JFrame frame = new JFrame("Gourmet Coffee");

            frame.setContentPane(new GourmetCoffeeGUI(catalog));
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setSize(WIDTH, HEIGHT);
            frame.setResizable(true);
            frame.setVisible(true);

        } catch (FileNotFoundException fnfe) {
            stdErr.println("The file does not exist");

            System.exit(1);

        } catch (DataFormatException dfe) {
            stdErr.println("The file contains malformed data: "
                    + dfe.getMessage());

            System.exit(1);
        }
    }

    /**
     * Instantiates the components and arranges them in a window.
     *
     * @param initialCatalog a product catalog.
     */
    public GourmetCoffeeGUI(Catalog initialCatalog) {

        // create the components
        catalogList = new JList();
        orderList = new JList();
        catalogList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        catalogList.setVisibleRowCount(CATALOG_LIST_ROWS);
        catalogList.setFixedCellWidth(CATALOG_CELL_SIZE);
        orderList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        orderList.setVisibleRowCount(ORDER_LIST_ROWS);
        orderList.setFixedCellWidth(ORDER_CELL_SIZE);
        addModifyButton = new JButton("Add|Modify Order Item");
        removeButton = new JButton("Remove Order Item");
        registerSaleButton = new JButton("Register Sale of Current Order");
        displaySalesButton = new JButton("Display Sales");
        saveSalesButton = new JButton("Save Sales");
        quantityLabel = new JLabel("Quantity:");
        totalLabel = new JLabel("Total:");
        quantityTextField = new JTextField("", QUANTITY__TEXTFIELD_SIZE);
        totalTextField = new JTextField("$0.00", TOTAL__TEXTFIELD_SIZE);
        totalTextField.setEditable(false);
        statusTextArea = new JTextArea(STATUS_ROWS, STATUS_COLS);
        statusTextArea.setEditable(false);
        plainRadioButton = new JRadioButton("Plain", true);
        HTMLRadioButton = new JRadioButton("HTML");
        XMLRadioButton = new JRadioButton("XML");
        ButtonGroup group = new ButtonGroup();
        group.add(plainRadioButton);
        group.add(HTMLRadioButton);
        group.add(XMLRadioButton);

        // Product Information panel
        productPanel = new JPanel();
        productPanel.setBorder(
                BorderFactory.createTitledBorder("Product Information"));

        // Catalog panel
        JPanel catalogPanel = new JPanel();
        catalogPanel.setBorder(BorderFactory.createTitledBorder("Catalog"));
        catalogPanel.add(
                new JScrollPane(catalogList,
                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                        JScrollPane.HORIZONTAL_SCROLLBAR_NEVER));

        // "Add|Modify Product" panel
        JPanel centralPanel = new JPanel(new BorderLayout());
        JPanel addModifyPanel = new JPanel(new GridLayout(2, 1));
        JPanel quantityPanel = new JPanel();
        quantityPanel.add(quantityLabel);
        quantityPanel.add(quantityTextField);
        addModifyPanel.add(quantityPanel);
        addModifyPanel.add(addModifyButton);
        centralPanel.add(productPanel, BorderLayout.CENTER);
        centralPanel.add(addModifyPanel, BorderLayout.SOUTH);

        // Order panel
        JPanel orderPanel = new JPanel(new BorderLayout());
        orderPanel.setBorder(BorderFactory.createTitledBorder("Order"));
        JPanel totalPanel = new JPanel();
        totalPanel.add(totalLabel);
        totalPanel.add(totalTextField);
        JPanel buttonsPanel = new JPanel(new GridLayout(2, 1));
        buttonsPanel.add(removeButton);
        buttonsPanel.add(registerSaleButton);
        orderPanel.add(totalPanel, BorderLayout.NORTH);
        orderPanel.add(new JScrollPane(orderList,
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_NEVER), BorderLayout.CENTER);
        orderPanel.add(buttonsPanel, BorderLayout.SOUTH);

        // Status panel
        JPanel bottomPanel = new JPanel(new BorderLayout());
        bottomPanel.setBorder(BorderFactory.createTitledBorder("Status"));
        JPanel salesButtonsPanel = new JPanel(new GridLayout(1, 5));
        salesButtonsPanel.add(plainRadioButton);
        salesButtonsPanel.add(HTMLRadioButton);
        salesButtonsPanel.add(XMLRadioButton);
        salesButtonsPanel.add(displaySalesButton);
        salesButtonsPanel.add(saveSalesButton);
        bottomPanel.add(new JScrollPane(statusTextArea,
                JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED), BorderLayout.CENTER);
        bottomPanel.add(salesButtonsPanel, BorderLayout.SOUTH);

        // arrange panels in window
        setLayout(new BorderLayout());
        add(catalogPanel, BorderLayout.WEST);
        add(centralPanel, BorderLayout.CENTER);
        add(orderPanel, BorderLayout.EAST);
        add(bottomPanel, BorderLayout.SOUTH);

        // start listening for list and buttons events
        catalogList.addListSelectionListener(new DisplayProductListener());
        addModifyButton.addActionListener(new AddModifyListener());
        removeButton.addActionListener(new RemoveListener());
        registerSaleButton.addActionListener(new RegisterSaleListener());
        displaySalesButton.addActionListener(new DisplaySalesListener());
        saveSalesButton.addActionListener(new SaveSalesListener());
        plainRadioButton.addActionListener(new PlainListener());
        HTMLRadioButton.addActionListener(new HTMLListener());
        XMLRadioButton.addActionListener(new XMLListener());

        // populate the product catalog
        catalog = initialCatalog;
        catalogList.setListData(catalog.getCodes());

        currentOrder = new Order();
        sales = new Sales();
        salesFormatter = PlainTextSalesFormatter.getSingletonInstance();
        fileChooser = new JFileChooser();
        dollarFormatter = NumberFormat.getCurrencyInstance();
    }

    /**
     * This inner class handles list-selection events.
     */
    class DisplayProductListener implements ListSelectionListener {

        /**
         * Displays the information of the selected product.
         *
         * @param event the event object.
         */
        public void valueChanged(ListSelectionEvent event) {

            if (!catalogList.getValueIsAdjusting()) {
                String code = (String) catalogList.getSelectedValue();

                Product product = catalog.getProduct(code);

                productPanel.removeAll();
                productPanel.setVisible(false);        // Use this
                productPanel.add(product.getPanel());  // to update the
                productPanel.setVisible(true);         // panel correctly

                statusTextArea.setText("Product " + code
                        + " has been displayed");
            }
        }
    }

    /**
     * This inner class processes <code>addModifyButton</code> events.
     */
    class AddModifyListener implements ActionListener {

        /**
         * Adds an order item to the current order.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            String var3 = (String) GourmetCoffeeGUI.this.catalogList.getSelectedValue();

            int var2;
            try {
                var2 = Integer.parseInt(GourmetCoffeeGUI.this.quantityTextField.getText());
            } catch (NumberFormatException var6) {
                GourmetCoffeeGUI.this.statusTextArea.setText("Please enter an integer.");
                return;
            }

            if (var2 < 1) {
                GourmetCoffeeGUI.this.statusTextArea.setText("Please enter a right integer.");
            } else if (var3 == null) {
                GourmetCoffeeGUI.this.statusTextArea.setText("Please select a product code from the catalog list.");
            } else {
                Product var4 = GourmetCoffeeGUI.this.catalog.getProduct(var3);
                OrderItem var5 = GourmetCoffeeGUI.this.currentOrder.getItem(var4);
                if (var5 == null) {
                    var5 = new OrderItem(var4, var2);
                    GourmetCoffeeGUI.this.currentOrder.addItem(var5);
                    GourmetCoffeeGUI.this.orderList.setListData(GourmetCoffeeGUI.this.currentOrder.getItems());
                    GourmetCoffeeGUI.this.statusTextArea.setText("The product has been added.");
                } else {
                    var5.setQuantity(var2);
                    GourmetCoffeeGUI.this.orderList.setListData(GourmetCoffeeGUI.this.currentOrder.getItems());
                    GourmetCoffeeGUI.this.statusTextArea.setText("The product has been modified.");
                }

                GourmetCoffeeGUI.this.totalTextField.setText(GourmetCoffeeGUI.this.dollarFormatter.format(GourmetCoffeeGUI.this.currentOrder.getTotalCost()));
                GourmetCoffeeGUI.this.quantityTextField.setText("");
            }
        }

    }

    /**
     * This inner class processes <code>removeButton</code> events.
     */
    class RemoveListener implements ActionListener {

        /**
         * Removes an order item from the current order.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            if (GourmetCoffeeGUI.this.currentOrder.getNumberOfItems() == 0) {
                GourmetCoffeeGUI.this.statusTextArea.setText("The order is empty.");
            } else {
                OrderItem var2 = (OrderItem) GourmetCoffeeGUI.this.orderList.getSelectedValue();
                if (var2 == null) {
                    GourmetCoffeeGUI.this.statusTextArea.setText("Please select an item from the order list.");
                } else {
                    GourmetCoffeeGUI.this.currentOrder.removeItem(var2);
                    GourmetCoffeeGUI.this.orderList.setListData(GourmetCoffeeGUI.this.currentOrder.getItems());
                    GourmetCoffeeGUI.this.totalTextField.setText(GourmetCoffeeGUI.this.dollarFormatter.format(GourmetCoffeeGUI.this.currentOrder.getTotalCost()));
                    GourmetCoffeeGUI.this.statusTextArea.setText("The product has been removed.");
                }
            }
        }
    }

    /**
     * This inner class processes <code>registerSaleButton</code> button events.
     */
    class RegisterSaleListener implements ActionListener {

        /**
         * Registers the sale of the current order.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            if (currentOrder.getNumberOfItems() == 0) {
                statusTextArea.setText("The order is empty.");
            } else {
                sales.addOrder(currentOrder);
                currentOrder = new Order();
                orderList.setListData(currentOrder.getItems());
                totalTextField.setText(dollarFormatter.format(0));
                statusTextArea.setText("The sale has been registered.");
            }
        }
    }

    /**
     * This inner class processes <code>displaySalesButton</code>events.
     */
    class DisplaySalesListener implements ActionListener {

        /**
         * Displays the sales information.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            if (sales.getNumberOfOrders() == 0) {
                statusTextArea.setText("No orders have been sold.");
            } else {
                statusTextArea.setText(salesFormatter.formatSales(sales));
            }
        }
    }

    /*
     * This inner class processes <code>saveSalesButton</code>  events.
     */
    class SaveSalesListener implements ActionListener {

        /**
         * Saves the sales informations in a file.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            if (GourmetCoffeeGUI.this.sales.getNumberOfOrders() == 0) {
                GourmetCoffeeGUI.this.statusTextArea.setText("No orders have been sold.");
            } else {
                GourmetCoffeeGUI.this.fileChooser.setFileSelectionMode(0);
                int var2 = GourmetCoffeeGUI.this.fileChooser.showSaveDialog((Component) null);
                if (var2 != 0) {
                    GourmetCoffeeGUI.this.statusTextArea.setText("The sales information has not been saved.");
                } else {
                    File var3 = GourmetCoffeeGUI.this.fileChooser.getSelectedFile();

                    try {
                        PrintWriter var4 = new PrintWriter(new FileWriter(var3));
                        var4.print(GourmetCoffeeGUI.this.salesFormatter.formatSales(GourmetCoffeeGUI.this.sales));
                        var4.close();
                        GourmetCoffeeGUI.this.statusTextArea.setText("The sales information has been saved.");
                    } catch (IOException var5) {
                        GourmetCoffeeGUI.this.statusTextArea.setText("Error: Problem with I/O");
                    }
                }
            }
            /* PLACE YOUR CODE HERE */

        }
    }

    /*
     * This inner class processes <code>plainRadioButton</code> events.
     */
    class PlainListener implements ActionListener {

        /**
         * Sets the sales formatter to plain text.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            salesFormatter = PlainTextSalesFormatter.getSingletonInstance();
        }
    }

    /*
     * This inner class processes <code>HTMLRadioButton</code> events.
     */
    class HTMLListener implements ActionListener {

        /**
         * Sets the sales formatter to HTML.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {
            salesFormatter = HTMLSalesFormatter.getSingletonInstance();
        }
    }

    /*
     * This inner class processes <code>XMLRadioButton</code> events.
     */
    class XMLListener implements ActionListener {

        /**
         * Sets the sales formatter to XML.
         *
         * @param event the event object.
         */
        public void actionPerformed(ActionEvent event) {

            salesFormatter = XMLSalesFormatter.getSingletonInstance();
        }
    }
}