Help!

Java Programming 5th edition chapter 12 page 871 number 19

Below the instructions for this program, I've been working on this and this is what I have so far and I need some help with it . I'm wondering in the display bill method and the itemStateChanged method if there is a way to make it an array so I dont have to type as much. I'm also wondering if instead of using setLocation, setSize if I can use like (BorderLayout.NORTH) or something like that.

Write a GUI application program, to create a menu for a pizza shop. Use check boxes, radio buttons, and a JButton to allow a customer to make selections and process their order. Use a text area to display the customer?s order and the amount due. A sample menu and a customer?s order is shown in Figure below:

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

public class PizzaShop extends JFrame implements ItemListener, ActionListener { private JCheckBox tomatoCB, greenPepperCB, blackOlivesCB, mushroomsCB, extraCheeseCB, pepperoniCB, sausageCB; private JRadioButton smallRB, mediumRB, largeRB; private JRadioButton thinCrustRB, mediumCrustRB, panRB; private ButtonGroup PizzaSize, PizzaType;

private JLabel toppingsL, sizeL, crustL; private JTextArea bill;

public void init() { //Creating the frame label setTitle("Pizza Shop");

Container c = getContentPane(); c.setLayout(null);

//Create checkBoxes for different topping options toppingsL = new JLabel("Each Topping: $1.50"); tomatoCB = new JCheckBox("Tomato"); greenPepperCB = new JCheckBox("Green Pepper"); blackOlivesCB = new JCheckBox("Black Olives"); mushroomsCB = new JCheckBox("Mushrooms"); extraCheeseCB = new JCheckBox("Extra Cheese"); pepperoniCB = new JCheckBox("Pepperoni"); sausageCB = new JCheckBox("Sausage");

//Create radioButtons for the different pizza size options sizeL = new JLabel("Pizza Size"); smallRB = new JRadioButton("Small: $6.50); mediumRB = new JRadioButton("Medium: $8.50); largeRB = new JRadioButton("Large: $10.00);

//Create radioButtons for the different pizza crust options crustL = new JLabel("Pizza Type"); thinCrustRB = new JRadioButton("Thin Crust"); mediumCrustRB = new JRadioButton("Medium Crust"); panRB = new JRadioButton("Pan");

//Set the size for different topping options toppingsL.setSize(150,30); tomatoCB.setSize(120,30); greenPepperCB.setSize(120,30); blackOlivesCB.setSize(120,30); mushroomsCB.setSize(120,30); extraCheeseCB.setSize(120,30); pepperoniCB.setSize(120,30); sausageCB.setSize(120,30);

//Set the size for the different pizza size options sizeL.setSize(120,30); smallRB.setSize(120,30); mediumRB.setSize(120,30); largeRB.setSize(120,30);

//Set the size for the different pizza crust options crustL.setSize(120,30); thinCrustRB.setSize(110,30); mediumCrustRB.setSize(110,30); panRB.setSize(110,30);

//Set the location for different topping options toppingsL.setLocation(30,70); tomatoCB.setLocation(40,100); greenPepperCB.setLocation(40,130); blackOlivesCB.setLocation(40,160); mushroomsCB.setLocation(40,190); extraCheeseCB.setLocation(40,220); pepperoniCB.setLocation(40,250); sausageCB.setLocation(40,280);

//Set the location for the different pizza size options sizeL.setLocatin(190,70); smallRB.setLocation(200,100); mediumRB.setLocation(200,140); largeRB.setLocation(200,180);

//Set the location for the different pizza crust options crustL.setLocation(360,70); thinCrustRB.setLocation(380,100); mediumCrustRB.setLocation(380,140); panRB.setLocation(380,180);

//Add the addItemListener tomatoCB.addItemListener(this); greenPepperCB.addItemListener(this); blackOlivesCB.addItemListener(this); mushroomsCB.addItemListener(this); extraCheeseCB.addItemListener(this); pepperoniCB.addItemListener(this); sausageCB.addItemListener(this);

smallRB.addItemListener(this); mediumRB.addItemListener(this); largeRB.addItemListener(this);

thinCrustRB.addItemListener(this); mediumCrustRB.addItemListener(this); panRB.addItemListener(this);

c.add(toppingsL); c.add(tomatoCB); c.add(greenPepperCB); c.add(blackOlivesCB); c.add(mushroomsCB); c.add(extraCheeseCB); c.add(pepperoniCB); c.add(sausageCB); c.add(sizeL); c.add(smallRB); c.add(mediumRB); c.add(largeRB);

c.add(crustL); c.add(thinCrustRB); c.add(mediumCrustRB); c.add(panRB);

//Create the button group PizzaSize = new ButtonGroup(); PizzaSize.add(smallRB); PizzaSize.add(mediumRB); PizzaSize.add(largeRB);

PizzaType = new ButtonGroup(); PizzaType.add(thinCrustRB); PizzaType.add(mediumCrustRB); PizzaType.add(panRB);

//Create the Process Selection button JButton button = new JButton("Process Selection"); button.setSize(200,30); button.setLocation(200,240); button.setLocation(200,240); button.addActionListener(this); } public void paint(Graphics g) { super.paint(g); g.setColor(Color.red); g.drawRect(30,100,140,240); g.drawRect(190,100,140,150); g.drawRect(355,100,150,150);

g.setFont(new Font("Arial", Font.BOLD,24); g.drawString("Welcome to Home Style Pizza Shop", 40,80); } public void itemStateChanged(ItemEvent e) { } private void displayBill() { } public void actionPerformed(ActionEvent event) { } public static void main(String[] args) { } }//end class

Pizza Shop Welcome to Home Style Pizza Shop Pizza Type Pizza Size Each Topping $1.50 Tomato O Small: $6.50 Thin Crust Green Peppper O Medium: $8.50 O Medium Crust Black Olives Mushrooms O Pan Large: $10.00 Extra Cheese Pepproni Process Selection Sausage Your order: Pizza type: thin crust Pizza Size: large Toppings: tomato, green pepper, black olives, mushrooms, Amount Due: $16.0 Pizza Shop Welcome to Home Style Pizza Shop Pizza Type Pizza Size Each Topping $1.50 Tomato O Small: $6.50 Thin Crust Green Peppper O Medium: $8.50 O Medium Crust Black Olives Mushrooms O Pan Large: $10.00 Extra Cheese Pepproni Process Selection Sausage Your order: Pizza type: thin crust Pizza Size: large Toppings: tomato, green pepper, black olives, mushrooms, Amount Due: $16.0