Inventory_Program6a:
import java.awt.*;
import java.io.*;
import java.text.*;
import java.util.*;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.*;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.JLabel;
 
public class Inventory_Program6a extends JFrame
{
	// instance variables
	private int displayBooks = 0; // variable for actionEvents
	private int arrayCount;
 
	private JButton firstButton;
	private JButton previousButton;
	private JButton nextButton;
	private JButton lastButton;
	private JButton addButton;
	private JButton deleteButton;
	private JButton modifyButton;
	private JButton saveButton;
	private JButton searchButton;
 
	private JTextField bookTitleField;
	private JTextField itemNumberField;
	private JTextField unitsInStockField;
	private JTextField bookPriceField;
	private JTextField inventoryValueField;
	private JTextField bookAuthorField;
	private JTextField restockingFeeField;
 
	private JLabel bookTitleLabel;
	private JLabel itemNumberLabel;
	private JLabel unitsInStockLabel;
	private JLabel bookPriceLabel;
	private JLabel inventoryValueLabel;
	private JLabel bookAuthorLabel;
	private JLabel restockingFeeLabel;
 
	private JPanel display;
	private JPanel content;
	private JTextArea textArea;
	private JLabel label;
 
	// Declare an array of classes
 
	private Book2 myBook[];
 
	// method to sort inventory by book title
	public Book2[] sortBookInventory()
    	{
        	for(int i = 0; i < myBook.length; i++) 
		{
            	String bookTitle1 = myBook[i].getBookTitle();
            	int min = i;
            	String bookTitle = bookTitle1;
            		for(int j = i+1; j < myBook.length; j++) 
			{
                	String bookTitle2 = myBook[j].getBookTitle();
                		if(bookTitle2.compareTo(bookTitle) < 0) 
				{
                    		min = j;
                    		bookTitle = bookTitle2;
                		}
            		}
            	if(!bookTitle.equals(bookTitle1)) 
		{
                	Book2 temp = myBook[i];
                	myBook[i] = myBook[min];
                	myBook[min] = temp;
           	}
        	}
        		return myBook;
	} // end method sortBookInventory
 
	// constructor
	public Inventory_Program6a()
	{		
		double totalInventoryValue = 0.0;
 
		// Specify how many items are in the array
		// instantiate Book2 object
		myBook = new Book2[5];
		myBook[0] = new Book2("The Key Triology", 1, 25, 7.99, "Nora Roberts");
		myBook[1] = new Book2("The Shinning", 2, 15, 5.99, "Stephen King");
		myBook[2] = new Book2("Wild Acre", 3, 7, 4.99, "Phillipa Gregory");
		myBook[3] = new Book2("Dark Paradise", 4, 2, 12.99, "Tami Hoag");
		myBook[4] = new Book2("Dollhouse Murders", 5, 18, 2.95, "Betty Ren Wright");
 
		// call method sort book inventory for display
		sortBookInventory();
 
		for (int i = 0; i<5; i++)
		{
 
			// display the book title
			System.out.println("The book title is: " + myBook[i].getBookTitle());
 
			// display the item number
			System.out.println("The item number is: " + myBook[i].getItemNumber());
 
			// display the number of units in stock
			System.out.println("The number of units in stock is: " + myBook[i].getBookUnits());
 
			// display the price per book
			System.out.printf("The price of the book is: $%.2f\n", myBook[i].getBookPrice());
 
			// display the value of the inventory
			System.out.printf("The value of the inventory is: $%.2f\n", myBook[i].inventoryValue());
 
			// display the book author
			System.out.println("The book author is: " + myBook[i].getBookAuthor());
 
			// display the restocking fee
			System.out.println("Restock Fee: " + myBook[i].inventoryValue() * 0.05);
 
			// calculate total inventory value with restocking fee added
			totalInventoryValue += (myBook[i].inventoryValue() * 1.05);
 
			// insert blank line
			System.out.println();
 
		} // end for
 
		// display the total value of the inventory with the restocking fee
		System.out.printf("The total value of the book inventory including the restocking fee is: $%5.2f.\n", totalInventoryValue);
 
		// display the total value of the inventory excluding the restocking fee
		System.out.println("The total value of the book inventory is: " + totalInventoryValue());
 
		//JLabel constructor for logo
		Icon logo = new ImageIcon("C:/book.jpg");
		label = new JLabel(logo);
		label.setToolTipText("Joyce's Logo");
 
		// create textArea
		textArea = new JTextArea(myBook[3]+"\n");
 
		// Create content panel, set layout
		content = new JPanel();
		content.setLayout(new FlowLayout());
		content.setLayout(new GridLayout(3,4));
 
		// create JPanel for array items
		display = new JPanel();
		display.setLayout(new FlowLayout());
		display.setLayout(new GridLayout(7,1));
 
		arrayCount = displayBooks;
 
		// set window (JFrame) characteristics
		setLayout(new BorderLayout());
		getContentPane().add(new JScrollPane(display), BorderLayout.CENTER);
		getContentPane().add(content, BorderLayout.SOUTH);
		getContentPane().add(label, BorderLayout.NORTH);
		pack();
		setTitle("Book Inventory Program");
		setSize(400, 400); // set frame size
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLocationRelativeTo(null);
 
		// initialize components
 
		bookTitleField = new JTextField();
		bookTitleField.setEditable(false);
 
		itemNumberField = new JTextField();
		itemNumberField.setEditable(false);
 
		unitsInStockField = new JTextField();
		unitsInStockField.setEditable(false);
 
		bookPriceField = new JTextField();
		bookPriceField.setEditable(false);
 
		inventoryValueField = new JTextField();
		inventoryValueField.setEditable(false);
 
		bookAuthorField = new JTextField();
		bookAuthorField.setEditable(false);				
 
		restockingFeeField = new JTextField();
		restockingFeeField.setEditable(false);	
 
		// initialize components
		firstButton = new JButton("First");
		content.add(firstButton);
 
		previousButton = new JButton("Previous");
		content.add(previousButton);
 
		nextButton = new JButton("Next");
		content.add(nextButton);
 
		lastButton = new JButton("Last");
		content.add(lastButton);
 
		addButton = new JButton("Add");
		content.add(addButton);
 
		deleteButton = new JButton("Delete");
		content.add(deleteButton);
 
		modifyButton = new JButton("Modify");
		content.add(modifyButton);
 
		saveButton = new JButton("Save");
		content.add(saveButton);
 
		searchButton = new JButton("Search");
		content.add(searchButton);
 
		// display JLabels and JTextFields on display panel
		display.add(new JLabel("Book Title: "));
		display.add(bookTitleField);
 
		display.add(new JLabel("Item Number: "));
		display.add(itemNumberField);
 
		display.add(new JLabel("Units in Stock: "));
		display.add(unitsInStockField);
 
		display.add(new JLabel("Book Price: "));
		display.add(bookPriceField);
 
		display.add(new JLabel("Inventory Value: "));
		display.add(inventoryValueField);
 
		display.add(new JLabel("Book Author: "));
		display.add(bookAuthorField);
 
		display.add(new JLabel("Restocking Fee: "));
		display.add(restockingFeeField);
 
		// assign actionListener and actionEvent to firstButton
		firstButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
			if (event.getActionCommand()== "First")
			{
			displayBooks = 0;
			}
		setTextFields();
		} // end firstButton actionEvent
		}); // end lastButton actionListener
 
		// assign actionListener and actionEvent to previousButton
		previousButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
		if (event.getActionCommand()== "Previous")
		displayBooks--;
		if (displayBooks < 0)
		{
		displayBooks = 0;
			if (displayBooks == 0)
			{
			displayBooks = displayBooks = myBook.length-1;
			}
		}
		setTextFields();
		} // end previousButton actionEvent
		}); // end previousBUtton actionListener
 
		// assign actionListener and actionEvent to nextButton
		nextButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
		if (event.getActionCommand()== "Next")
		displayBooks++;
		if (displayBooks >= myBook.length)
		{
		displayBooks = myBook.length-1;
			if (displayBooks == myBook.length-1)
			{
			displayBooks = 0;
			}
		}
		setTextFields();
		} // end nextButton actionEvent
		}); // end nextButton actionListener
 
		// assign actionListener and actionEvent to lastButton
		lastButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
		if (event.getActionCommand()== "Last")
		{
		displayBooks = myBook.length-1;
		}
		setTextFields();
		} // end lastButton actionEvent
		}); // end lastButton actionListener
 
 
		// assign actionListener and actionEvent to lastButton
		addButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
 
		Book2 newBookTitle = new Book2();
		newBookTitle.setBookTitle(bookTitleField.getText());
		} // end addButton actionEvent
		}); // end addButton actionListener
 
 
 
 
		// assign actionListener and actionEvent to saveButton
		saveButton.addActionListener(new ActionListener()
		{
		public void actionPerformed(ActionEvent event)
		{
		if (event.getActionCommand()== "Save")
		{
			FileOutputStream out;
			PrintStream p;
			try
			{
				String strDirectory = "c:/data";
				new File(strDirectory).mkdir();
				out = new FileOutputStream ("C:/data/inventory.dat");
				p = new PrintStream(out);
					for (int i = 0; i<= 5 - 1; i++)
					{
						p.println("Book Title: " + myBook[i].getBookTitle()+"\n");
						p.println("Item Number: " + myBook[i].getItemNumber()+"\n");
						p.println("Book Units: " + myBook[i].getBookUnits()+"\n");
						p.println("Book Price: " + myBook[i].getBookPrice()+"\n");
						p.println("Inventory Value: " + myBook[i].inventoryValue()+"\n");
						p.println("Book Restocking Fee: " + myBook[i].bookRestockingFee()+"\n");
						p.println("");
					}
				p.close();
				}
			catch (Exception e)
			{
				System.out.println("error");
			}
			}
			setTextFields();
 
		} // end lastButton actionEvent
		}); // end lastButton actionListener
 
	} // end constructor
 
	// method to calculate the value of the entire inventory
	public double totalInventoryValue()
	{ 
		double totalInventoryValue = 0.00;
 
		for ( int counter = 0; counter < myBook.length; counter++ )
 
			totalInventoryValue += myBook[counter].inventoryValue();
 
		return totalInventoryValue;
 
	} // end method totalBookValue
 
	// method to setTextFields
	private void setTextFields()
	{
	if (displayBooks == arrayCount)
		{
			displayBooks = 0;
		}
		if (displayBooks < 0)
		{
			displayBooks = arrayCount -1;
		}
	bookTitleField.setText(myBook[displayBooks].getBookTitle()+"\n");
	itemNumberField.setText(myBook[displayBooks].getItemNumber()+"\n");
	unitsInStockField.setText(myBook[displayBooks].getBookUnits()+"\n");
	bookPriceField.setText(myBook[displayBooks].getBookPrice()+"\n");
	inventoryValueField.setText(myBook[displayBooks].inventoryValue()+"\n");
	bookAuthorField.setText(myBook[displayBooks].getBookAuthor()+"\n");
	restockingFeeField.setText(myBook[displayBooks].bookRestockingFee()+"\n");
	} // end method setTextFields
 
	// main method begins execution of Java application
	public static void main( String args [])
	{ 
		new Inventory_Program6a();
		//create JFrame
		Inventory_Program6a inventory = new Inventory_Program6a();
		inventory.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		inventory.setVisible(true);		
 
	} // end method main
 
} // end class Inventory_Program6a

public class Book2 extends Book
{
 
	// Book2 variable
	private String bookAuthor; // Author of the book
 
 
	// Book2 constructor
	public Book2(String bookTitle, int itemNumber, int bookUnits, double bookPrice, String bookAuthor)
	{
 
		// call super class constructor
		super(bookTitle, itemNumber, bookUnits, bookPrice);
 
		this.bookAuthor = bookAuthor; // initializes bookTitle for Book2
	} // end constructor
 
	// method to set the book author
	public void setBookAuthor (String bookAuthor)
	{
		this.bookAuthor = bookAuthor;
	} // end method setBookAuthor
 
	// method to retrieve the book author
	public String getBookAuthor()
	{
		return bookAuthor;
	} // end method getBookAuthor
 
	// Calculate the stock value
	// Returns the total value of books in stock, adding a 5% restocking fee
	public double inventoryValue()
	{
		return (super.inventoryValue() * 1.05);
	}
 
	// method for returning the book restocking fee
	public double bookRestockingFee()
	{
		return(super.inventoryValue() * 0.05);
	}
 
	public String toString()
	{
	return String.format("Book Title: %s\nItem Number: %d\nUnits in Stock: %d\nBook Price: $%.2f\nInventory Value: $%.2f\nBook Author: %s\nRestocking Fee: $%.2f\n", getBookTitle(), getItemNumber(), getBookUnits(), getBookPrice(), inventoryValue(), getBookAuthor(), bookRestockingFee());
	}
 
} // end class Book2

public class Book // Book has four attributes
{
 
	private String bookTitle = "";	
	private int itemNumber = 0;
	private int bookUnits = 0;
	private double bookPrice = 0.00;
 
	// Book constructor
	public Book (String bookTitle, int itemNumber, int bookUnits, double bookPrice)
	{
		this.bookTitle = bookTitle; // initializes bookTitle for Book		
		this.itemNumber = itemNumber; // initializes itemNumber for Book
		this.bookUnits = bookUnits; // initializes bookUnits for Book
		this.bookPrice = bookPrice; // initializes bookPrice for Book
	} // end constructor
 
	// method to set the book title
	public void setBookTitle (String bookTitle)
	{
		this.bookTitle = bookTitle;
	} // end method setBookTitle
 
	// method to retrieve the book title
	public String getBookTitle()
	{
		return bookTitle;
	} // end method getBookTitle
 
	// method to set the item number
	public void setItemNumber (int itemNumber)
	{
		this.itemNumber = itemNumber;
	} // end method setItemNumber
 
	// method to retrieve the item number
	public int getItemNumber()
	{
		return itemNumber;
	} // end method getItemNumber
 
	// method to set the book units
	public void setBookUnits (int bookUnits)
	{
		this.bookUnits = bookUnits;
	} // end method setBookUnits
 
	// method to retrieve the book units
	public int getBookUnits()
	{
		return bookUnits;
	} // end method getBookUnits
 
	// method to set the book price
	public void setBookPrice (double bookPrice)
	{
		this.bookPrice = bookPrice;
	} // end method setBookPrice
 
	// method to retrieve the book price
	public double getBookPrice()
	{
		return bookPrice;
	} // end method getBookPrice
 
	// method to calculate the inventory value
	public double inventoryValue()
	{
		return bookPrice * bookUnits;
	} // end method inventoryValue
 
} // end class Book