Question
You are to design and implement a GUI application that will calculate the price of a pizza,
based upon the size, style of crust, and selection of toppings.
The price is calculated
according to the following rules:
• A plain small pizza is $6, medium is $8, large is $10, and a partysize
is $12.
• Thick crust is $1.00 more than thin crust, regardless of size.
• Additional toppings are $0.75, $1.25, $1.75, and $2.25 each for small, medium,
large, and partysize
pizzas, respectively.
I recommend using radio buttons for the choice of size and crust, and check boxes for the
selection of toppings. There should be at least six different toppings available.
Program:
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
import java.awt.event.*;
public class PizzaCalculator extends JFrame implements ActionListener {
JPanel westPanel = new JPanel();
JPanel eastPanel = new JPanel();
JPanel centerPanel = new JPanel();
JPanel northPanel = new JPanel();
JPanel southPanel = new JPanel();
// pizza size options
JRadioButton Small = new JRadioButton("Small");
JRadioButton Medium = new JRadioButton("Medium");
JRadioButton Large = new JRadioButton("Large");
JRadioButton Party = new JRadioButton("Party");
// pizza crust choices
JRadioButton Thin = new JRadioButton("Thin");
JRadioButton Thick = new JRadioButton("Thick");
// pizza topping selections
JCheckBox Cheese = new JCheckBox("Cheese");
JCheckBox Pepperoni = new JCheckBox("Pepperoni");
JCheckBox Sausage = new JCheckBox("Sausage");
JCheckBox Ham = new JCheckBox("Ham");
JCheckBox Pinapple = new JCheckBox("Pinapple");
JCheckBox BlackOlives = new JCheckBox("Black Olives");
// calculate, clear, and total buttons
JButton Calculate = new JButton("Calculate");
JButton Clear = new JButton("Clear");
JLabel Total = new JLabel("Total: ");
JTextField TotalResult = new JTextField(8);
// variables used to calculate total
int TopQty = 0;
double Size = 0;
double TopCost = 0;
double CrustCost = 0;
double TotalCost = 0;
public PizzaCalculator() {
// layout north portion of frame
northPanel.setLayout(new GridLayout(2, 3));
northPanel.setBorder(new TitledBorder("Pizza Size and Crust Type:"));
// register listeners with buttons
Small.addActionListener(this);
Medium.addActionListener(this);
Large.addActionListener(this);
Party.addActionListener(this);
Calculate.addActionListener(this);
ButtonGroup pizzaSize = new ButtonGroup();
pizzaSize.add(Small);
pizzaSize.add(Medium);
pizzaSize.add(Large);
pizzaSize.add(Party);
ButtonGroup pizzaCrust = new ButtonGroup();
pizzaCrust.add(Thin);
pizzaCrust.add(Thick);
// add buttons to north panel
northPanel.add(new JTextField("Pizza Total Calculator"));
northPanel.add(Small);
northPanel.add(Medium);
northPanel.add(Large);
northPanel.add(Party);
northPanel.add(Thin);
northPanel.add(Thick);
centerPanel.setLayout(new GridLayout(5, 5));
centerPanel.setBorder(new TitledBorder("Toppings:"));
centerPanel.add(Cheese);
centerPanel.add(Pepperoni);
centerPanel.add(Sausage);
centerPanel.add(Ham);
centerPanel.add(Pinapple);
centerPanel.add(BlackOlives);
southPanel.add(Calculate);
southPanel.add(Clear);
southPanel.add(Total);
southPanel.add(TotalResult);
// add all portions of panel
setLayout(new BorderLayout(5, 5));
add(northPanel, BorderLayout.NORTH);
add(centerPanel, BorderLayout.CENTER);
add(southPanel, BorderLayout.SOUTH);
}
// handle action event for each pizza option
public void actionPerformed(ActionEvent e) {
if (e.getSource() == Small)
setSizeS();
else if (e.getSource() == Medium)
setSizeM();
else if (e.getSource() == Large)
setSizeL();
else if (e.getSource() == Party)
setSizeP();
if (e.getSource() == Thin)
setCrustThin();
else if (e.getSource() == Thick)
setCrustThick();
if (e.getSource() == Cheese)
TopQty++;
else if (e.getSource() == Pepperoni)
TopQty++;
else if (e.getSource() == Sausage)
TopQty++;
else if (e.getSource() == Ham)
TopQty++;
else if (e.getSource() == Pinapple)
TopQty++;
else if (e.getSource() == BlackOlives)
TopQty++;
TopCost(TopQty);
if (e.getSource() == Calculate)
calculate(Size, TopCost, CrustCost);
}
public double setSizeS() {
return Size = 6.00;
}
public double setSizeM() {
return Size = 8.00;
}
public double setSizeL() {
return Size = 10.00;
}
public double setSizeP() {
return Size = 12.00;
}
public double setCrustThin() {
return CrustCost = 0.00;
}
public double setCrustThick() {
return CrustCost = 1.00;
}
public double TopCost(int TopQty) {
if (e.getSource() == Small)
if (TopQty == 1)
TopCost = 0.75;
else if (TopQty == 2)
TopCost = 2 * (0.75);
else if (TopQty == 3)
TopCost = 3 * (0.75);
else if (TopQty == 4)
TopCost = 4 * (0.75);
else if (TopQty == 5)
TopCost = 5 * (0.75);
else if (TopQty == 6)
TopCost = 6 * (0.75);
else if (e.getSource() == Medium)
if (TopQty == 1)
TopCost = 1.25;
else if (TopQty == 2)
TopCost = 2 * (1.25);
else if (TopQty == 3)
TopCost = 3 * (1.25);
else if (TopQty == 4)
TopCost = 4 * (1.25);
else if (TopQty == 5)
TopCost = 5 * (1.25);
else if (TopQty == 6)
TopCost = 6 * (1.25);
else if (e.getSource() == Large)
if (TopQty == 1)
TopCost = 1.75;
else if (TopQty == 2)
TopCost = 2 * (1.75);
else if (TopQty == 3)
TopCost = 3 * (1.75);
else if (TopQty == 4)
TopCost = 4 * (1.75);
else if (TopQty == 5)
TopCost = 5 * (1.75);
else if (TopQty == 6)
TopCost = 6 * (1.75);
else if (e.getSource() == Party)
if (TopQty == 1)
TopCost = 2.25;
else if (TopQty == 2)
TopCost = 2 * (2.25);
else if (TopQty == 3)
TopCost = 3 * (2.25);
else if (TopQty == 4)
TopCost = 4 * (2.25);
else if (TopQty == 5)
TopCost = 5 * (2.25);
else if (TopQty == 6)
TopCost = 6 * (2.25);
return TopCost;
}
public void calculate(double Size, double TopCost, double CrustCost) {
TotalCost = Size + TopCost + CrustCost;
TotalResult.setText(String.valueOf(TotalCost));
}
public static void main(String[] args) {
PizzaCalculator PizzaCalc = new PizzaCalculator();
// set window title
PizzaCalc.setTitle("Pizza Cost Calculator");
// set window location
PizzaCalc.setLocationRelativeTo(null);
// specify window location
PizzaCalc.setDefaultCloseOperation(JFrame.EXIT_ON_ClOSE);
// set window size
PizzaCalc.setSize(800, 250);
// display window
PizzaCalc.setVisible(true);
}
}
Error:
----jGRASP exec: javac -g PizzaCalculator.java
PizzaCalculator.java:166: error: cannot find symbol
if(e.getSource() == Small)
^
symbol: variable e
location: class PizzaCalculator
PizzaCalculator.java:179: error: cannot find symbol
else if(e.getSource() == Medium)
^
symbol: variable e
location: class PizzaCalculator
PizzaCalculator.java:192: error: cannot find symbol
else if(e.getSource() == Large)
^
symbol: variable e
location: class PizzaCalculator
PizzaCalculator.java:205: error: cannot find symbol
else if(e.getSource() == Party)
^
symbol: variable e
location: class PizzaCalculator
PizzaCalculator.java:237: error: cannot find symbol
PizzaCalc.setDefaultCloseOperation(JFrame.EXIT_ON_ClOSE );
^
symbol: variable EXIT_ON_ClOSE
location: class JFrame
errors
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
