I Did It Your Way, 11.95 The History of Scotland, 14.50 Learn Calculus in One Da

ID: 3779659 • Letter: I

Question

I Did It Your Way, 11.95 The History of Scotland, 14.50 Learn Calculus in One Day, 29.95 Feel the Stress, 18.50

Each line in the file contains the name of a book, followed by a comma, followed by the book's retail price. When your application begins execution, it should read the contents of the file and store the book titles in a list component. The user should be able to select a title from the list and add it to a shopping cart, which is simply another list component. The application should have buttons or menu items that allow the user to remove items from the shopping cart, clear the shopping cart of all selections, and check out. When the user checks out, the application should calculate and display the subtotal of all the books in the shopping cart, the sales tax (which is 6% of the subtotal), and the total.

Explanation / Answer

Answer:

I Did It Your Way, 11.95 The History of Scotland, 14.50 Learn Calculus in One Day, 29.95 Feel the Stress, 18.50

//Import needed packages

import java.awt.*;

import java.awt.event.*;
import java.util.Scanner;
import java.io.*;
import javax.swing.JOptionPane;
import javax.swing.DefaultListModel;
import javax.swing.*;
import java.text.DecimalFormat;
public class BookStoreGUI extends JFrame {
private static final int WINDOW_WIDTH= 800; //Width of GUI frame
private static final int WINDOW_LENGTH = 250; //Length of GUI frame
private JPanel booksPanel; //Holds all the books
private JPanel buttonsPanel; //Has add/remove/checkout buttons
private JPanel shoppingCartPanel; //To hold books added by user
private JPanel bannerPanel; //Banner panel
private JPanel searchButtonsPanel; //Holds search/showall buttons
private JList booksList; //List with all book names
private JList selectedList; //List in shopping cart
private JButton addSelected; //Adds book to shopping cart
private JButton removeSelected; //Removes book from shopping cart
private JButton checkOut; //Adds all books prices + taxes
private JButton searchButton; //Searches for desired book
private JButton showAllButton; //shows all books available
private BookInfo booksInfo = new BookInfo(); //BookInfo object
private String[] bookNames = booksInfo.getBookNames(); //Array that Holds all book names
private double[] bookPrices = booksInfo.getBookPrices();//Array that holds all book prices
private JScrollPane scrollPane1; //Holds available books list
private JScrollPane scrollPane2; //Holds selected book list
private JLabel panelTitle; //Panel title
private JLabel cartTitle; //Panel title
private JLabel banner; //Panel title
private JTextField searchField; //Allows user to input search
private int element = -1; // control variable
private int selectedIndex; //Index selected among available books
private int index; //Int that holds selected index.
private int i,count; //Control variables
private double total; //Total of prices
private double bookPrice; //Hold book prices
private final double TAX=0.06; //Constant for tax value
private ListModel books; //List model for book name list
private ListModel shoppingCart; //List model for shopping cart list
private DefaultListModel shoppingCartDFM;
private DecimalFormat money; //Money format
private Object selectedBookName; //Selected book
private String searchResults; //Hold search results
private String notFound = " Title not found"; //Holds search results
private boolean found = false; //Boolean holds false if search results not found
/*Constructor
* BookStoreGUI - Buuilds a GUI with multiple panels
*/
public BookStoreGUI() throws IOException{
//Title of GUI
setTitle("Book Store Shopping Cart");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
setSize(WINDOW_WIDTH, WINDOW_LENGTH);
//BuildPanels
buildBooksPanel();
buildButtonsPanel();
buildShoppingCartPanel();
buildBannerPanel();
buildSearchButtonsPanel();
//Add panels to GUI frame
add(bannerPanel,BorderLayout.NORTH);
add(booksPanel, BorderLayout.WEST);
add(buttonsPanel, BorderLayout.CENTER);
add(shoppingCartPanel, BorderLayout.EAST);
add(searchButtonsPanel, BorderLayout.SOUTH);
//set visibility
setVisible(true);
pack();
}
//METHODS
/*
*buildBooksPanel() - Builds panel containing a JList/ScrollPane
*/
public void buildBooksPanel(){
//Create panel to hold list of books
booksPanel = new JPanel();
//Set Panel layout
booksPanel.setLayout(new BorderLayout());
//Create the list
booksList = new JList(bookNames);
//Set selection preferrence

booksList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);

//Visible book names

booksList.setVisibleRowCount(5);
//Create scroll pane containing book list
scrollPane1 = new JScrollPane(booksList);
scrollPane1.setPreferredSize(new Dimension(175,50));
//JLabel/Panel title
panelTitle = new JLabel("Available Books");
//Add JLabel and scroll to panel
booksPanel.add(panelTitle, BorderLayout.NORTH);
booksPanel.add(scrollPane1);
}
/*
* buildButtonsPanel - builds panel containing add/remove/checkout buttons
*/
public void buildButtonsPanel(){
//Create panel to hold buttons
buttonsPanel = new JPanel();
//Set Layout
buttonsPanel.setLayout(new GridLayout(3,1));
//Create Buttons
addSelected = new JButton("Add Selected Item");
removeSelected = new JButton("Remove Selected Item");
checkOut = new JButton("Check Out");
//add Listeners
addSelected.addActionListener(new AddButtonListener());
removeSelected.addActionListener(new RemoveButtonListener());
checkOut.addActionListener(new CheckOutButtonListener());
//Add button panel to GUI
buttonsPanel.add(addSelected);
buttonsPanel.add(removeSelected);
buttonsPanel.add(checkOut);
}
/*
* buildShoppingCartPanel builds panel containing JList/Scroll pane
*/
public void buildShoppingCartPanel(){
//Create panel
shoppingCartPanel = new JPanel();
//Set panel layout
shoppingCartPanel.setLayout(new BorderLayout());
//Create shopping cart list
selectedList = new JList();
//Set row visilityselectedList.setVisibleRowCount(5);
//Create scrollpane containin selected list items
scrollPane2 = new JScrollPane(selectedList);
scrollPane2.setPreferredSize(new Dimension(175,50));
//JLabel/Panel title
cartTitle = new JLabel("Shopping Cart ");
//Add JLabel and scroll pane to panel
shoppingCartPanel.add(cartTitle, BorderLayout.NORTH);
shoppingCartPanel.add(scrollPane2);
}
/*
* buildBannerPanel - builds panel containing banner for GUI
*/
public void buildBannerPanel(){
//Create panel
bannerPanel = new JPanel();
//Set Border layout
setLayout(new BorderLayout());
//String containing JLabel text

String labelText= "<html> Welcome" + " To " +

"AsThePagesTurn.com" ;
//create JLabel
JLabel banner = new JLabel(labelText);

banner.setFont(new Font("Serif",Font.BOLD,28));
//add banner to panel
bannerPanel.add(banner);

}
/*
* buildSearchButtonsPanel - builds panel containing search and showall buttons

*/public void buildSearchButtonsPanel(){

//Create panel
searchButtonsPanel = new JPanel();
//Set Border layout
searchButtonsPanel.setLayout(new GridLayout(1, 3 ,5,5));
//Create buttons
searchButton = new JButton("Search");
showAllButton = new JButton("Show All");
//Create text field
searchField = new JTextField(15);
//Add listeners
searchButton.addActionListener(new SearchButtonListener());
showAllButton.addActionListener(new ShowAllButtonListener());
//Add buttons and text field to panel

searchButtonsPanel.add(searchField);

searchButtonsPanel.add(searchButton);

searchButtonsPanel.add(showAllButton);
}
//ACTION LISTENERS

/*
* AddButtonListener - adds selected item to shopping cart upon selection
*/
public class AddButtonListener implements ActionListener{

public void actionPerformed(ActionEvent e) {
selectedIndex = booksList.getSelectedIndex();

selectedBookName = booksList.getSelectedValue();
books = booksList.getModel();
shoppingCart = selectedList.getModel();
shoppingCartDFM = new DefaultListModel();
for(count=0; count<shoppingCart.getSize(); count++){
shoppingCartDFM.addElement(shoppingCart.getElementAt(count));
}
if(element == -1)

bookPrice += bookPrices[selectedIndex];

else

bookPrice += bookPrices[element];
shoppingCartDFM.addElement(selectedBookName);

selectedList.setModel(shoppingCartDFM);}
}
/** RemoveButtonListener - Removes selected item from shopping cart upon selection
*/
public class RemoveButtonListener implements ActionListener{
public void actionPerformed(ActionEvent e) {
index = selectedList.getSelectedIndex();
((DefaultListModel)selectedList.getModel()).remove(index);
if(element == -1)

if(bookPrices[selectedIndex] <= bookPrice)

bookPrice -= (bookPrices[selectedIndex]);
else
bookPrice = (bookPrices[index]) - bookPrice;
else
if(bookPrices[element] <= bookPrice)
bookPrice -= (bookPrices[element]);
else
bookPrice = (bookPrices[index]) - bookPrice;
}
}
/*
* CheckOutButtonListener - Calculates total and displays it to user
*/

public class CheckOutButtonListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

money = new DecimalFormat("#,##0.00");
total = (bookPrice + (bookPrice*TAX));
JOptionPane.showMessageDialog(null, "Subtotal: $" + (money.format(bookPrice)) + " " +

"Tax: $" + (money.format((bookPrice*TAX))) + " " +

"Total: $" + (money.format(total)));

}
}
/*
* SearchButtonListener - searches for user desired item
*/
public class SearchButtonListener implements ActionListener{

public void actionPerformed(ActionEvent e) {
index = 0;
while(!found && index < bookNames.length)
{
if(bookNames[index].equals(searchField.getText())){
found = true;
element = index;}
index++;
}
if(element == -1){

booksList.setModel(new DefaultListModel());

((DefaultListModel)booksList.getModel()).addElement(notFound);

}

else{

searchResults = bookNames[element];

booksList.setModel(new DefaultListModel());

((DefaultListModel)booksList.getModel()).addElement(searchResults);

}

}
}
/*

* ShowsAllButtonListener - shows all available books
*/
public class ShowAllButtonListener implements ActionListener{

public void actionPerformed(ActionEvent e) {
booksList.setModel(new DefaultListModel());
for(i=0; i < bookNames.length; i++){

((DefaultListModel)booksList.getModel()).addElement(bookNames[i]);
}

}

}
public static void main(String[] args) throws IOException{

new BookStoreGUI();

}

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