Need help on swapping JPanel that holds JTextField with new value.

The problem that I have is passing a bean from one class to another. I'm supposed to subtract the number of books (quantityPurchaseTextField entered by the user) with the current inventory which will show in the Inventory Details tab but unfortunately it doesn't work for me. I may need to swap the JPanel held in the Inventory class with a new one that carries the JTextField with the new value inventory. I don't know the syntax for that. Please help

/*
 * This class renders the menu bar. Each menu item has a listener to load the new and inventory pages
 */
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.Serializable;
import javax.swing.*;

public class BookOrder implements ActionListener, Serializable {
	CardLayout cardLayout = new CardLayout();
	JPanel panelHoldsCards = new JPanel();
	JPanel newOrder = new NewOrder();
	JPanel inventory = new Inventory();
	JMenuItem newMenuItem = new JMenuItem("New");
	JMenuItem editMenuItem = new JMenuItem("Edit");
	JMenuItem inventoryMenuItem = new JMenuItem("Inventory");

OrderInfo info = new OrderInfo();

BookOrder() {
		JFrame frame = new JFrame("Order Entry");
		Container contentPane = frame.getContentPane();
		JPanel panel = new JPanel();
		contentPane.add(panelHoldsCards);
		JMenuBar menuBar = new JMenuBar();
		JMenu fileMenu = new JMenu("Order");

fileMenu.add(newMenuItem);
		fileMenu.add(editMenuItem);
		fileMenu.add(inventoryMenuItem);

menuBar.add(fileMenu);
		frame.setJMenuBar(menuBar);
		panelHoldsCards.setLayout(cardLayout);
		panelHoldsCards.add(panel, "Nothing");
		newMenuItem.addActionListener(this);
		newMenuItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {

if (ae.getSource() == newMenuItem) {
					clearTextFields(newOrder);
					clearComboBoxes(newOrder);
					clearCheckBoxes(newOrder);
					clearLists(newOrder);
					clearRadioButtons(newOrder);
				}
			}
		});

editMenuItem.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
		editTextFields(newOrder);
			}
		
	});
		inventoryMenuItem.addActionListener(this);

frame.pack();
		frame.setSize(800, 1000);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	public void editTextFields(Container container) {

for (Component c : container.getComponents()) {
			if (c instanceof JTextField) {
				((JTextField) c).setText(info.getBillingStreet()); //this doesn't persist 
				
			} else if (c instanceof Container) {
				editTextFields((Container) c);
			}
		}
	}

public void clearTextFields(Container container) {

for (Component c : container.getComponents()) {
			if (c instanceof JTextField) {
				((JTextField) c).setText("");
			} else if (c instanceof Container) {
				clearTextFields((Container) c);
			}
		}
	}

public void clearComboBoxes(Container container) {
		for (Component co : container.getComponents()) {
			if (co instanceof JComboBox) {
				((JComboBox) co).setSelectedIndex(0);
			} else if (co instanceof Container) {
				clearComboBoxes((Container) co);
			}
		}
	}

public void clearCheckBoxes(Container container) {
		for (Component com : container.getComponents()) {
			if (com instanceof JCheckBox) {
				((JCheckBox) com).setSelected(false);
			} else if (com instanceof Container) {
				clearCheckBoxes((Container) com);
			}
		}
	}

public void clearLists(Container container) {
		for (Component comp : container.getComponents()) {
			if (comp instanceof JList) {
				((JList) comp).setSelectedIndex(0);
			} else if (comp instanceof Container) {
				clearLists((Container) comp);
			}
		}
	}

public void clearRadioButtons(Container container) {
		// ButtonModel a = order.group.getSelection();
		for (Component comp : container.getComponents()) {
			if (comp instanceof JRadioButton) {
				((JRadioButton) comp).setSelected(false);
			} else if (comp instanceof Container) {
				clearRadioButtons((Container) comp);
			}
		}
	}

public static void main(String[] args) throws FileNotFoundException {
		BookOrder bookOrder = new BookOrder();
	}

public void addNewPanel(String actionCommand) {
		panelHoldsCards.add(newOrder, "New");
		cardLayout.show(panelHoldsCards, "New");
	}

public void addEditPanel(String actionCommand) {
		panelHoldsCards.add(newOrder, "Edit");
		cardLayout.show(panelHoldsCards, "Edit");
	}

public void addInventoryPanel(String actionCommand) {
		panelHoldsCards.add(inventory, "Inventory");
		cardLayout.show(panelHoldsCards, "Inventory");
	}

public void actionPerformed(ActionEvent ae) {
		String actionCommand = ae.getActionCommand();
		if (ae.getSource() instanceof JMenuItem) {
			String nothing = "Nothing";
			if ("Nothhing".equals(actionCommand))
				cardLayout.first(panelHoldsCards);
			else if ("New".equals(actionCommand))
				addNewPanel("New");
			else if ("Edit".equals(actionCommand))
				addEditPanel("Edit");
			else if ("Inventory".equals(actionCommand))
				addInventoryPanel("Inventory");
		}
	}
}

/*
 * This class loads the Order and Edit Page. The constructor initializes all components.
 * The submit button triggers the bean to set values entered by the user//THIS DOESN'T WORK
 */

import java.awt.Component;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.Serializable;
import java.text.NumberFormat;
import java.util.ArrayList;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class NewOrder extends JPanel implements ItemListener, ActionListener, Serializable {

public JTextField billingStreetAddressTextField;
	public JTextField billingApartmentAddressTextField;
	public JTextField billingCityAddressTextField;
	public JComboBox billingStateAddressComboBox;
	public String states[] = { "Alabama", "Alaska", "American Samoa",
			"Arizona", "Arkansas", "California", "Colorado", "Connecticut",
			"Delaware", "District of Columbia", "Florida", "Georgia", "Guam",
			"Hawaii", "Idaho", "Illinois", "Indiana", "Iowa", "Kansas",
			"Kentucky", "Louisiana", "Maine", "Maryland", "Massachusetts",
			"Michigan", "Minnesota", "Mississippi", "Missouri", "Montana",
			"Nebraska", "Nevada", "New Hampshire", "New Jersey", "New Mexico",
			"New York", "North Carolina", "North Dakota",
			"Northern Marianas Islands", "Ohio", "Oklahoma", "Oregon",
			"Pennsylvania", "Puerto Rico", "Rhode Island", "South Carolina",
			"South Dakota", "Tennessee", "Texas", "Utah", "Vermont",
			"Virginia", "Virgin Islands", "Washington", "West Virginia",
			"Wisconsin", "Wyoming" };

ActionListener stateListener = new StateSelected();

public int stateBillingAddressIndex;
	public int stateShippingAddressIndex;

public JTextField billingCountryAddressTextField;
	public JTextField shippingStreetAddressTextField;
	public JTextField shippingApartmentAddressTextField;
	public JTextField shippingCityAddressTextField;
	public JComboBox shippingStateAddressComboBox;
	public JTextField shippingCountryAddressTextField;

public JList booksList;
	ArrayList<String> list = new ArrayList<String>();
	public final String books[] = {
			"Who needs an IT book when there is internet", "Expensive IT book",
			"Outdated IT book", "Heavy IT Book" };
	String displayBooks;

public JTextField quantityPurchaseTextField;
	public JFormattedTextField orderTotalTextField;

public JCheckBox addressCheckBox;

public JRadioButton[] paymentMethod;

public JPasswordField creditCardTextField;
	public JPasswordField payPalTextField;
	public JLabel creditCardLabel;
	public JLabel payPalLabel;

public JButton submit;

ButtonGroup group = new ButtonGroup();

Inventory inventory = new Inventory();
	OrderInfo info = new OrderInfo();

public NewOrder() {

JPanel holdPanel = new JPanel();
		JPanel componentsPanel = new JPanel();

componentsPanel.setLayout(new BoxLayout(componentsPanel,
				BoxLayout.PAGE_AXIS));

JLabel billingLabel = new JLabel("Billing Address    ");
		billingLabel.setFont(new Font("TimesRoman", Font.BOLD, 20));
		billingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(billingLabel);

JLabel streetBillingLabel = new JLabel(
				"Street Address                   ");
		streetBillingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(streetBillingLabel);

billingStreetAddressTextField = new JTextField(20);
		componentsPanel.add(billingStreetAddressTextField);

JLabel apartmentBillingLabel = new JLabel(
				"Apartment Number            ");
		apartmentBillingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(apartmentBillingLabel);

billingApartmentAddressTextField = new JTextField(20);
		componentsPanel.add(billingApartmentAddressTextField);

JLabel cityBillingLabel = new JLabel(
				"City                                         ");
		cityBillingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(cityBillingLabel);

billingCityAddressTextField = new JTextField(20);
		componentsPanel.add(billingCityAddressTextField);

JLabel stateBillingLabel = new JLabel(
				"State                                      ");
		stateBillingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(stateBillingLabel);

billingStateAddressComboBox = new JComboBox(states);
		componentsPanel.add(billingStateAddressComboBox);
		billingStateAddressComboBox.addActionListener(stateListener);

JLabel countryBillingLabel = new JLabel(
				"Country                                 ");
		countryBillingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(countryBillingLabel);

billingCountryAddressTextField = new JTextField(20);
		componentsPanel.add(billingCountryAddressTextField);

JLabel shippingLabel = new JLabel("Shipping Address");
		shippingLabel.setFont(new Font("TimesRoman", Font.BOLD, 20));
		shippingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(shippingLabel);

addressCheckBox = new JCheckBox("Same as Billing Address?");
		addressCheckBox.addItemListener(this);
		componentsPanel.add(addressCheckBox);

JLabel shippingStreetLabel = new JLabel(
				"Street Address                   ");
		shippingStreetLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(shippingStreetLabel);

shippingStreetAddressTextField = new JTextField(20);
		componentsPanel.add(shippingStreetAddressTextField);

JLabel apartmentShippingLabel = new JLabel(
				"Apartment Number            ");
		apartmentShippingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(apartmentShippingLabel);

shippingApartmentAddressTextField = new JTextField(20);
		componentsPanel.add(shippingApartmentAddressTextField);

JLabel cityShippingLabel = new JLabel(
				"City                                         ");
		cityShippingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(cityShippingLabel);
		shippingCityAddressTextField = new JTextField(20);
		componentsPanel.add(shippingCityAddressTextField);

JLabel stateShippingLabel = new JLabel(
				"State                                      ");
		stateShippingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(stateShippingLabel);
		shippingStateAddressComboBox = new JComboBox(states);
		componentsPanel.add(shippingStateAddressComboBox);

JLabel countryShippingLabel = new JLabel(
				"Country                                 ");
		countryShippingLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(countryShippingLabel);
		shippingCountryAddressTextField = new JTextField(20);
		componentsPanel.add(shippingCountryAddressTextField);

JLabel booksToPurchaseLabel = new JLabel("Select Book to purchase");
		booksToPurchaseLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
		componentsPanel.add(booksToPurchaseLabel);
		booksList = new JList(books);
		componentsPanel.add(booksList);
		booksList
				.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
		booksList.addListSelectionListener(new ListSelectionListener() {
			public void valueChanged(ListSelectionEvent lse) {
				if (!lse.getValueIsAdjusting()) {
					Object[] booksSelectedArray = booksList.getSelectedValues();

for (int i = 0; i < booksSelectedArray.length; i++) {
						displayBooks = (String) booksSelectedArray[i];
					}
					list.add(displayBooks);
				}
			}
		});

JLabel qtyBooksLabel = new JLabel(
				"How many books would you like to purchase today?                  ");
		componentsPanel.add(qtyBooksLabel);
		quantityPurchaseTextField = new JTextField(20);
		componentsPanel.add(quantityPurchaseTextField);

JLabel totalLabel = new JLabel("Order Total");
		componentsPanel.add(totalLabel);

orderTotalTextField = new JFormattedTextField();
		componentsPanel.add(orderTotalTextField);
		orderTotalTextField.setEditable(false);

quantityPurchaseTextField.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {

try {
					Double orderTotal = (Double
							.parseDouble(quantityPurchaseTextField.getText()) * 100);
					NumberFormat formattedOrderTotal = NumberFormat
							.getInstance();
					orderTotalTextField.setText(""
							+ formattedOrderTotal.format(orderTotal));

} catch (NumberFormatException nfe) {

}
			}
		});

quantityPurchaseTextField.addFocusListener(new FocusListener() {
			public void focusGained(FocusEvent event) {

try {
					Double orderTotal = (Double
							.parseDouble(quantityPurchaseTextField.getText()) * 100);
					NumberFormat formattedOrderTotal = NumberFormat
							.getInstance();
					orderTotalTextField.setText(""
							+ formattedOrderTotal.format(orderTotal));

} catch (NumberFormatException nfe) {
				}
			}

public void focusLost(FocusEvent event) {
				focusGained(event);
			}
		});
		// JPanel radioPanel = new JPanel();
		final JRadioButton[] paymentMethod = new JRadioButton[3];
		paymentMethod[0] = new JRadioButton("Credit Card");
		paymentMethod[1] = new JRadioButton("PayPal");
		paymentMethod[2] = new JRadioButton("Invoice on Delivery");

paymentMethod[0].setActionCommand("Credit Card");
		paymentMethod[1].setActionCommand("PayPal");
		paymentMethod[2].setActionCommand("Invoice on Delivery");

paymentMethod[0].addActionListener(this);
		paymentMethod[1].addActionListener(this);
		paymentMethod[2].addActionListener(this);

for (int i = 0; i < paymentMethod.length; i++) {
			group.add(paymentMethod[i]);
			componentsPanel.add(paymentMethod[i]);
		}
		// radioPanel.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),
		// "Payment Method"));
		creditCardLabel = new JLabel("Credit Card");
		componentsPanel.add(creditCardLabel);
		creditCardTextField = new JPasswordField();
		componentsPanel.add(creditCardTextField);
		creditCardTextField.setVisible(false);
		creditCardLabel.setVisible(false);

payPalLabel = new JLabel("PayPal");
		componentsPanel.add(payPalLabel);
		payPalTextField = new JPasswordField();
		componentsPanel.add(payPalTextField);
		payPalTextField.setVisible(false);
		payPalLabel.setVisible(false);

submit = new JButton("Submit");
		componentsPanel.add(submit);
		submit.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent ae) {
				info.setBillingStreet(billingStreetAddressTextField.getText()); //This is to test the Edit menu item from the BookOrder class
				System.out.print(billingStreetAddressTextField.getText());
				info.setQuantityPurchase(quantityPurchaseTextField.getText());
				info.setCurrentInventory(Integer.parseInt(quantityPurchaseTextField.getText()));
				int n = info.getCurrentInventory();  //UPDATED VALUE
				inventory.createInventoryDetailsPanel(n);//PASSING THE UPDATED VALUE TO THE INVENTORY CLASS
			}
		});
		holdPanel.add(componentsPanel);
		add(holdPanel);		
	}
	@Override
	public void itemStateChanged(ItemEvent ie) {

String a = billingStreetAddressTextField.getText();
		String b = billingApartmentAddressTextField.getText();
		String c = billingCityAddressTextField.getText();
		String d = (String) billingStateAddressComboBox.getSelectedItem();
		String e = billingCountryAddressTextField.getText();

if (addressCheckBox.isSelected()) {
			shippingStreetAddressTextField.setText(a);
			shippingApartmentAddressTextField.setText(b);
			shippingCityAddressTextField.setText(c);
			shippingStateAddressComboBox.setSelectedItem(d);
			shippingCountryAddressTextField.setText(e);
		} else {
			shippingStreetAddressTextField.setText("");
			shippingApartmentAddressTextField.setText("");
			shippingCityAddressTextField.setText("");
			shippingStateAddressComboBox.setSelectedIndex(0);
			shippingCountryAddressTextField.setText("");
		}
	}

public void actionPerformed(ActionEvent ae) {
		ButtonModel bModel = group.getSelection();
		if (bModel.getActionCommand() == "Credit Card") {
			creditCardLabel.setVisible(true);
			creditCardTextField.setVisible(true);
			payPalLabel.setVisible(false);
			payPalTextField.setVisible(false);
		}
		if (bModel.getActionCommand() == "PayPal") {
			payPalLabel.setVisible(true);
			payPalTextField.setVisible(true);
			creditCardLabel.setVisible(false);
			creditCardTextField.setVisible(false);
		}
		if (bModel.getActionCommand() == "Invoice on Delivery") {
			payPalLabel.setVisible(false);
			payPalTextField.setVisible(false);
			creditCardLabel.setVisible(false);
			creditCardTextField.setVisible(false);
		}
	}

public class StateSelected implements ActionListener {
		public void actionPerformed(ActionEvent ae) {
			stateBillingAddressIndex = (Integer) billingStateAddressComboBox
					.getSelectedIndex();
			stateShippingAddressIndex = (Integer) shippingStateAddressComboBox
					.getSelectedIndex();
		}
	}
}

import java.awt.FlowLayout;
import javax.swing.BoxLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;

public class Inventory extends JPanel {

private JTabbedPane pane = null;
	final JTextField inventoryTextField = new JTextField();

OrderInfo info2 = new OrderInfo();
	JPanel mainPanel = new JPanel();
	JPanel panel2;
	JPanel panel22;
	int currentInventory = 5000;
	int n;

public Inventory() {
		JPanel componentsPanel = new JPanel();
		componentsPanel.setLayout(new BoxLayout(componentsPanel,
				BoxLayout.PAGE_AXIS));
		componentsPanel.add(createInventoryPanel());
		add(mainPanel);
		mainPanel.setVisible(true);
		mainPanel.add(componentsPanel);
		add(mainPanel);
	}

public JTabbedPane createInventoryPanel() {
		pane = new JTabbedPane();
		pane.addTab("Inventory Details", createInventoryDetailsPanel(n));
		pane.addTab("Inventory Reordering", createInventoryOrderingPanel());
		return pane;
	}

JPanel createInventoryDetailsPanel(int n) {
		panel22 = new JPanel();
		mainPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
		JPanel panel1 = new JPanel();
		panel2 = new JPanel();
		panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));
		panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));
		panel1.add(new JLabel("Item", JLabel.CENTER));
		panel1.add(new JLabel(" Java How To Program : Deitel and Deitel "));
		panel2.add(new JLabel("Quantity", JLabel.CENTER));
		panel2.add(inventoryTextField);
		System.out.print("Current Inventory is " + n);
		if (n != 0) {//THIS IS WHERE I'M HAVING PROBLEMS TRYING TO PASS THE BEAN from the New Order class
					//SO THE NEW VALUE WILL SHOW IN THE TEXT FIELD FOR INVENTORY DETAILS. 
					//IT ALWAYS SHOWS 5000 NO MATTER WHAT (INITIALIZED ABOVE)
			inventoryTextField.setText(String.valueOf(n));
		} else {
			inventoryTextField.setText(String.valueOf(currentInventory));
		}
		panel22.add(panel1);
		panel22.add(panel2);
		return panel22;
	}

private JPanel createInventoryOrderingPanel() {
		JPanel panel = new JPanel();
		JTextField txt1 = new JTextField(10);
		panel.setLayout(new FlowLayout(FlowLayout.LEFT));
		JPanel panel1 = new JPanel();
		panel2 = new JPanel();
		panel1.setLayout(new BoxLayout(panel1, BoxLayout.Y_AXIS));
		panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));
		panel1.add(new JLabel("Item", JLabel.CENTER));
		panel1.add(new JLabel(" Java How To Program : Deitel and Deitel "));
		panel2.add(new JLabel("Quantity", JLabel.CENTER));
		panel2.add(txt1);
		panel.add(panel1);
		panel.add(panel2);
		return panel;
	}

}

import java.io.FileNotFoundException;
import java.io.Serializable;
import javax.swing.ButtonModel;

public class OrderInfo implements Serializable {

public String billingStreet;
	public String billingApartment;
	public String billingCity;
	public int billingState;
	public String billingCountry;
	public String shippingStreet;
	public String shippingApartment;
	public String shippingCity;
	public int shippingState;
	public String shippingCountry;
	public int bookName;
	public int quantityPurchase;
	public int currentInventory = 5000;
	public String orderTotal;
	public ButtonModel paymentMethod;
	public char[] creditCard;
	public char[] payPal;
	public int intQuantityPurchase;

/**
	 * @param billingStreet
	 * @param billingApartment
	 * @param billingCity
	 * @param billingState
	 * @param billingCountry
	 * @param shippingStreet
	 * @param shippingApartment
	 * @param shippingCity
	 * @param shippingState
	 * @param shippingCountry
	 * @param bookName
	 * @param quantityPurchase
	 * @param orderTotal
	 * @param paymentMethod
	 * @param creditCard
	 * @param payPal
	 * @throws FileNotFoundException 
	 */
	/*public OrderInfo(String billingStreet, String billingApartment,
			String billingCity, int billingState, String billingCountry,
			String shippingStreet, String shippingApartment,
			String shippingCity, int shippingState, String shippingCountry,
			int bookName, int quantityPurchase, String orderTotal,
			ButtonModel paymentMethod, char[] creditCard, char[] payPal) {
		super();
		this.billingStreet = billingStreet;
		this.billingApartment = billingApartment;
		this.billingCity = billingCity;
		this.billingState = billingState;
		this.billingCountry = billingCountry;
		this.shippingStreet = shippingStreet;
		this.shippingApartment = shippingApartment;
		this.shippingCity = shippingCity;
		this.shippingState = shippingState;
		this.shippingCountry = shippingCountry;
		this.bookName = bookName;
		this.quantityPurchase = quantityPurchase;
		this.orderTotal = orderTotal;
		this.paymentMethod = paymentMethod;
		this.creditCard = creditCard;
		this.payPal = payPal;
		//this.intQuantityPurchase = intQuantityPurchase;
	}
*/

public String getBillingStreet() {
		return billingStreet;
	}
	
	public void setBillingStreet(String billingStreet) {
		this.billingStreet = billingStreet;
		//System.out.print("form order info " + billingStreet);
	}

public String getBillingApartment() {
		return billingApartment;
	}

public void setBillingApartment(String billingApartment) {
		this.billingApartment = billingApartment;
	}

public String getBillingCity() {
		return billingCity;
	}

public void setBillingCity(String billingCity) {
		this.billingCity = billingCity;
	}

public int getBillingState() {
		return billingState;
	}

public void setBillingState(int billingState) {
		this.billingState = billingState;
	}

public String getBillingCountry() {
		return billingCountry;
	}

public void setBillingCountry(String billingCountry) {
		this.billingCountry = billingCountry;
	}

public String getShippingStreet() {
		return shippingStreet;
	}

public void setShippingStreet(String shippingStreet) {
		this.shippingStreet = shippingStreet;
	}

public String getShippingApartment() {
		return shippingApartment;
	}

public void setShippingApartment(String shippingApartment) {
		this.shippingApartment = shippingApartment;
	}

public String getShippingCity() {
		return shippingCity;
	}

public void setShippingCity(String shippingCity) {
		this.shippingCity = shippingCity;
	}

public int getShippingState() {
		return shippingState;
	}

public void setShippingState(int shippingState) {
		this.shippingState = shippingState;
	}

public String getShippingCountry() {
		return shippingCountry;
	}

public void setShippingCountry(String shippingCountry) {
		this.shippingCountry = shippingCountry;
	}

public int getBookName() {
		return bookName;
	}

public void setBookName(int bookName) {
		this.bookName = bookName;
	}

public int getQuantityPurchase() {
		return intQuantityPurchase;
	}

public void setQuantityPurchase(String quantityPurchase) {
		try {
			intQuantityPurchase = Integer.parseInt(quantityPurchase.trim());
		} catch (NumberFormatException e) {
			e.getMessage();
		}
	}

public int getCurrentInventory() {
		return currentInventory;
	}

public void setCurrentInventory(int intQuantityPurchase) {
		this.currentInventory = currentInventory - intQuantityPurchase;
	}

public String getOrderTotal() {
		return orderTotal;
	}

public void setOrderTotal(String orderTotal) {
		this.orderTotal = orderTotal;
	}

public ButtonModel getPaymentMethod() {
		return paymentMethod;
	}

public void setPaymentMethod(ButtonModel paymentMethod) {
		this.paymentMethod = paymentMethod;
	}

public char[] getCreditCard() {
		return creditCard;
	}

public void setCreditCard(char[] creditCard) {
		if (creditCard != null) {
			this.creditCard = creditCard;
		} else {
			creditCard[0] = 0;
		}
	}

public char[] getPayPal() {
		return payPal;
	}

public void setPayPal(char[] payPal) {
		if (payPal != null) {
			this.payPal = payPal;
		} else {
			payPal[0] = 0;
		}
	}

}

Welcome to the Ranch.

In future, while posting code, please UseCodeTags . I have edited your post to incorporate them. As you can see, the code is much more readable and easier to understand.
We have a forum dedicated UI forum. I will move this thread there for you.