import?java.util.*;
import?java.awt.*;
import?java.awt.event.*;
import?javax.swing.*;
import?javax.swing.event.*;
import?java.io.*;

/**
*?This?class?displays?the?catalog?of?the?gourmet?coffee?system.
*
*?@author?BlueDream?*?@version?1.1.0
*?@see?Product
*?@see?Coffee
*?@see?CoffeeBrewer
*?@see?Catalog
*?@see?CatalogLoader
*?@see?FileCatalogLoader
*?@see?DataFormatException
*?@see?DataField
*/
public?class?CatalogGUI?extends?JPanel?{

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

/*?Window?width?in?pixels?*/
static?private?int?WIDTH?=?420;

/*?Window?height?in?pixels?*/
static?private?int?HEIGHT?=?320;

/*?Size?of?the?list?cell?in?pixels?*/
static?private?int?CELL_SIZE?=?50;

/*?Visible?rows?in?list?*/
static?private?int?LIST_ROWS?=?10;

/*?Rows?in?status?text?area?*/
static?private?int?STATUS_ROWS?=?5;

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

private?JList?catalogList;
private?JPanel?productPanel;
private?JTextArea?statusTextArea;

private?Catalog?catalog;

/**
*?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（“Catalog?Gourmet?Coffee“）;

????frame.setContentPane（new?CatalogGUI（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?CatalogGUI（Catalog?initialCatalog）?{

???catalog?=?initialCatalog;

????//?create?the?components
???catalogList?=?new?JList（catalog.getCodes（））;
???catalogList.setSelectionMode（ListSelectionModel.SINGLE_SELECTION）;
???catalogList.setVisibleRowCount（LIST_ROWS）;
???catalogList.setFixedCellWidth（CELL_SIZE）;
???statusTextArea?=?new?JTextArea（STATUS_ROWS?STATUS_COLS）;
???statusTextArea.setEditable（false）;

???//?create?product?information?panel
???productPanel?=?new?JPanel（）;
???produc