Good Day. I would like to ask some about my project.
This is my PizzaBaseGUI.java
import java.awt.*;
import java.awt.GridLayout;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JCheckBox;
import javax.swing.JTextPane;
import javax.swing.JButton;
import javax.swing.JFrame;
import java.awt.Color;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.ImageIcon;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
public class PizzaBaseGUI extends JFrame implements ActionListener, ItemListener
{
JFrame frame = new JFrame();
private JButton[] addButton;
private JButton[] buttons;
private JButton[] textAreaButton;
private JTextField priceField;
private JRadioButton[] rButtons;
private JComboBox diyInchSize;
private JComboBox preFabInchSize;
private JComboBox preFabOptions;
private JCheckBox[] toppings;
private JTextArea textArea;
private String[] pizzaInch = {"Six-Inch", "Nine-Inch", "Twelve-Inch"};
private String[] preFab = {"Hawaiian Overload", "Ham & Egg", "Beef Pepperoni", "ChogBurizo", "Pizza Supreme"};
private double preFabSizeMultiplier;
private double diySizeMultiplier;
private double toppingsTotal;
private double preFabChoice;
private Toppings toppingOption; // This class is null
private PizzaSize size; // This class is null
private PreFab preFabPizza; // This class is null
public PizzaBaseGUI()
{
this.buttons = new JButton[4];
this.buttons[0] = new JButton("Coca-Cola (Small)");
this.buttons[1] = new JButton("Lemonade (Small)");
this.buttons[2] = new JButton("Coca-Cola (Large)");
this.buttons[3] = new JButton("Lemonade (Large)");
this.buttons[0].addActionListener(this);
this.buttons[1].addActionListener(this);
this.buttons[2].addActionListener(this);
this.buttons[3].addActionListener(this);
this.addButton = new JButton[2];
this.addButton[0] = new JButton("Add to Order(PreFab)");
this.addButton[1] = new JButton("Add to Order(Do-It-Yourself)");
this.addButton[0].addActionListener(this);
this.addButton[1].addActionListener(this);
this.textAreaButton = new JButton[2];
this.textAreaButton[0] = new JButton("Generate Bill");
this.textAreaButton[1] = new JButton("Reset Order");
this.buttons[0].addActionListener(this);
this.buttons[1].addActionListener(this);
this.rButtons = new JRadioButton[4];
this.rButtons[0] = new JRadioButton("Deep Crust");
this.rButtons[1] = new JRadioButton("Crispy Base");
this.rButtons[2] = new JRadioButton("Deep Crust");
this.rButtons[3] = new JRadioButton("Crispy Base");
ButtonGroup bgroup = new ButtonGroup();
bgroup.add(this.rButtons[0]);
bgroup.add(this.rButtons[1]);
bgroup.add(this.rButtons[2]);
bgroup.add(this.rButtons[3]);
this.toppings = new JCheckBox[6];
this.toppings[0] = new JCheckBox("Ham (30.25)");
this.toppings[1] = new JCheckBox("Pepperoni (47.50)");
this.toppings[2] = new JCheckBox("Bell Pepper (18.00)");
this.toppings[3] = new JCheckBox("Ground Meat (35.75)");
this.toppings[4] = new JCheckBox("Pineapple (24.25)");
this.toppings[5] = new JCheckBox("Chorizo (27.80)");
this.toppings[0].addItemListener(this);
this.toppings[1].addItemListener(this);
this.toppings[2].addItemListener(this);
this.toppings[3].addItemListener(this);
this.toppings[4].addItemListener(this);
this.toppings[5].addItemListener(this);
this.diyInchSize = new JComboBox(pizzaInch);
this.preFabInchSize = new JComboBox(pizzaInch);
this.preFabOptions = new JComboBox(preFab);
this.diyInchSize.addItemListener(this);
this.preFabInchSize.addItemListener(this);
this.preFabOptions.addItemListener(this);
frame.setLayout(new FlowLayout(FlowLayout.LEFT));
frame.setTitle("PizzaBase Automated Ordering System");
frame.getContentPane().setBackground(new Color(228,228,228));
frame.setSize(720,640);
frame.setResizable(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
JPanel panel1 = new JPanel(new GridBagLayout());
//panel1.setBorder(BorderFactory.createLineBorder(Color.black));
panel1.setBackground(new Color(228,228,228));
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 20;
panel1.add(new JLabel("Crust Type"), c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 21;
panel1.add(this.rButtons[2],c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 22;
panel1.add(this.rButtons[3],c);
frame.add(panel1);
JPanel panel5 = new JPanel();
panel5.setLayout(new GridLayout(1,1));
c.gridx = 0;
c.gridy = 1;
panel1.add(new JLabel("MENU"),c);
c.gridx = 1;
c.gridy = 2;
panel1.add(new JLabel("PreFab Options"), c);
c.gridx = 1;
c.gridy = 3;
panel5.add(this.preFabOptions);
panel1.add(panel5,c);
JPanel panel9 = new JPanel();
panel9.setLayout(new GridLayout(1,1));
c.gridx = 1;
c.gridy = 4;
panel1.add(new JLabel("Pizza Size(Inches)"), c);
c.gridx = 1;
c.gridy = 5;
panel9.add(this.preFabInchSize);
panel1.add(panel9,c);
JPanel panel18 = new JPanel(new GridBagLayout());
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 6;
panel1.add(new JLabel("Crust Type"), c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 7;
panel1.add(this.rButtons[0],c);
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 8;
panel1.add(this.rButtons[1],c);
panel1.add(panel18);
JPanel panel2 = new JPanel();
panel2.setLayout(new GridLayout(1,1));
c.gridx = 1;
c.gridy = 18;
panel1.add(new JLabel("Pizza Size(Inches)"), c);
c.gridx = 1;
c.gridy = 19;
panel2.add(this.diyInchSize);
panel1.add(panel2,c);
JPanel panel6 = new JPanel();
c.gridx = 1;
c.gridy = 10;
panel1.add(new JLabel("Do-It-Yourself Options"), c);
c.gridx = 1;
c.gridy = 11;
panel1.add(new JLabel("Select Toppings:"), c);
c.gridx = 1;
c.gridy = 12;
panel1.add(this.toppings[0], c);
c.gridx = 1;
c.gridy = 13;
panel1.add(this.toppings[1], c);
c.gridx = 1;
c.gridy = 14;
panel1.add(this.toppings[2], c);
c.gridx = 1;
c.gridy = 15;
panel1.add(this.toppings[3], c);
c.gridx = 1;
c.gridy = 16;
panel1.add(this.toppings[4], c);
c.gridx = 1;
c.gridy = 17;
panel1.add(this.toppings[5], c);
panel1.add(panel6);
JPanel panel3 = new JPanel();
GridLayout layout = new GridLayout(2,2);
layout.setHgap(5);
layout.setVgap(5);
panel3.setBackground(new Color(228,228,228));
panel3.setLayout(layout);
for(int i = 0; i < this.buttons.length; i++)
{
panel3.add(this.buttons[i]);
}
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 24;
panel1.add(new JLabel("Drink Options"), c);
c.gridx = 1;
c.gridy = 25;
panel1.add(panel3,c);
JPanel panel8 = new JPanel(new GridLayout(1,1));
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 9;
panel8.add(this.addButton[0]);
panel1.add(panel8,c);
JPanel panel24 = new JPanel(new GridLayout(1,1));
c.fill = GridBagConstraints.HORIZONTAL;
c.gridx = 1;
c.gridy = 23;
panel24.add(this.addButton[1]);
panel1.add(panel24,c);
JPanel textPanel = new JPanel (new GridBagLayout());
textArea = new JTextArea();
textArea.setPreferredSize(new Dimension(150,480));
textArea.setEditable(false);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx=0;
gbc.gridy=1;
textPanel.add((textArea),gbc);
frame.add(textPanel,gbc);
JPanel panel15 = new JPanel ();
GridLayout layout2 = new GridLayout(1,2);
panel15.setBackground(new Color(228,228,228));
layout2.setHgap(135);
panel15.setLayout(layout2);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx=0;
gbc.gridy=2;
panel15.add(this.textAreaButton[0],gbc);
panel15.add(this.textAreaButton[1],gbc);
textPanel.add(panel15,gbc);
}
public void itemStateChanged(ItemEvent i)
{
preFabChoice = 0.0;
toppingsTotal = 0.0;
if(this.toppings[0].isSelected())
{
toppingsTotal += toppingOption.addHam();;
}
if(this.toppings[1].isSelected())
{
toppingsTotal += toppingOption.addPepperoni();
}
if(this.toppings[2].isSelected())
{
toppingsTotal += toppingOption.addBellPepper();
}
if(this.toppings[3].isSelected())
{
toppingsTotal += toppingOption.addGroundMeat();
}
if(this.toppings[4].isSelected())
{
toppingsTotal += toppingOption.addPineapple();
}
if (this.toppings[5].isSelected())
{
toppingsTotal += toppingOption.addChorizo();
}
if (this.preFabOptions.getSelectedItem().toString().equals("Hawaiian Overload"))
{
preFabChoice += preFabPizza.addHawaiianOverload();
}
else if (this.preFabOptions.getSelectedItem().toString().equals("Ham & Egg"))
{
preFabChoice += preFabPizza.addHamEgg();
}
else if (this.preFabOptions.getSelectedItem().toString().equals("Beef Pepperoni"))
{
preFabChoice += preFabPizza.addBeefPepperoni();
}
else if (this.preFabOptions.getSelectedItem().toString().equals("ChogBurizo"))
{
preFabChoice += preFabPizza.addChogBurizo();
}
else if (this.preFabOptions.getSelectedItem().toString().equals("Pizza Supreme"))
{
preFabChoice += preFabPizza.addPizzaSupreme();
}
if (this.preFabInchSize.getSelectedItem().toString().equals("Six-Inch"))
{
preFabSizeMultiplier += size.getSixInchPrice();
}
else if (this.preFabInchSize.getSelectedItem().toString().equals("Nine-Inch"))
{
preFabSizeMultiplier += size.getNineInchPrice();
}
else if (this.preFabInchSize.getSelectedItem().toString().equals("Twelve-Inch"))
{
preFabSizeMultiplier += size.getTwelveInchPrice();
}
if (this.diyInchSize.getSelectedItem().toString().equals("Six-Inch"))
{
diySizeMultiplier += size.getSixInchPrice();
}
else if (this.diyInchSize.getSelectedItem().toString().equals("Nine-Inch"))
{
diySizeMultiplier += size.getNineInchPrice();
}
else if (this.diyInchSize.getSelectedItem().toString().equals("Twelve-Inch"))
{
diySizeMultiplier += size.getTwelveInchPrice();
}
}
public void actionPerformed(ActionEvent e)
{
Drinks drink = new Drinks();
String s = e.getActionCommand();
if(s.equals("Coca-Cola (Small)"))
{
textArea.setText("Coca-Cola (Small) = "+drink.addCocaColaSmall());
}
if(s.equals("Lemonade (Small)"))
{
textArea.setText("Lemonade (Small) = "+drink.addLemonadeSmall());
}
if(s.equals("Coca-Cola (Large)"))
{
textArea.setText("Coca-Cola (Large) = " +drink.addCocaColaLarge());
}
if(s.equals("Lemonade (Large)"))
{
textArea.setText("Lemonade (Large) = "+drink.addLemonadeLarge());
}
else if (s.equals("Add to Order(PreFab)"))
{
textArea.setText(String.valueOf(preFabChoice*preFabSizeMultiplier));
}
else if (s.equals("Add to Order(Do-It-Yourself)"))
{
textArea.setText(String.valueOf((100+toppingsTotal)*diySizeMultiplier));
}
else if (s.equals("Reset Order"))
{
textArea.setText("");
}
}
}
and this is my Toppings.java
public class Toppings extends PizzaBaseGUI
{
private double topping;
private double ham;
private double pepperoni;
private double bellPepper;
private double groundMeat;
private double pineapple;
private double chorizo;
public Toppings()
{
this.ham = 30.25;
this.pepperoni = 47.50;
this.bellPepper = 18.00;
this.groundMeat = 35.75;
this.pineapple = 24.25;
this.chorizo = 27.80;
}
public void setTopping()
{
this.topping = topping;
}
public double addHam()
{
return this.ham;
}
public double addPepperoni()
{
return this.pepperoni;
}
public double addBellPepper()
{
return this.bellPepper;
}
public double addGroundMeat()
{
return this.groundMeat;
}
public double addPineapple()
{
return this.pineapple;
}
public double addChorizo()
{
return this.chorizo;
}
}
My Interface When I check the ham option, the error occurs.
I tried to print my toppingOptions But it says null. I also tried all the suggestion from stacks that I found but its not working. Any help would be appreciated
