Joe\'s Auto shop performs the following service\'s: Oil change - $26.00 Lube job

Question

Joe's Auto shop performs the following service's:
Oil change - $26.00
Lube job - $18.00
Radiator Flush - $30.00
Transmission flush - $80.00
Inspection - $15.00
Muffler Replacement - $100.00
Tire Rotation - $20.00

Joe also performs other non routine services and charges for parts and for labor ($20.00 an hour). Create a GUI application that displays the total for a customer's visit to Joe's. I have the following code but have hit a road bump in getting it to function any help would be great.



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

import javax.swing.event.*;
import java.text.DecimalFormat;

@SuppressWarnings("serial")
public class JoesAutoShop extends JFrame implements ItemListener, ActionListener
{
private JPanel boxPanel;
private JPanel hourPanel;
private JPanel totalPanel;
private JCheckBox OilChange;
private double OIL = 26.00;
private JCheckBox LubeJob;
private double LUBE = 18.00;
private JCheckBox Radiator;
private double RAD = 30.00;
private JCheckBox Transmission;
private double TRANS = 80.00;
private JCheckBox Inspection;
private double INSP = 15.00;
private JCheckBox Muffler;
private double MUF = 100.00;
private JCheckBox TireRot;
private double TIRE = 20.00;
private JTextField numHours;
private JLabel total;
private JButton Calculate;

DecimalFormat dollar = new DecimalFormat("$0.00");

public JoesAutoShop()
{
setSize(300,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("Joes Auto Shop");

numHours = new JTextField(10);
numHours.addActionListener(this);

Calculate = new JButton("Calculate");
Calculate.addActionListener(this);

OilChange = new JCheckBox("Oil Change: $26.00");
OilChange.addItemListener(this);

LubeJob = new JCheckBox("Lube Jobe: $18.00");
LubeJob.addItemListener(this);

Radiator = new JCheckBox("Radiator flush: $30.00");
Radiator.addItemListener(this);

Transmission = new JCheckBox("Transmission flush: $80.00");
Transmission.addItemListener(this);

Inspection = new JCheckBox("Inspection: $15.00");
Inspection.addItemListener(this);

Muffler = new JCheckBox("Muffler replacement: $100.00");
Muffler.addItemListener(this);

TireRot = new JCheckBox("Tire rotation: $20.00");
TireRot.addItemListener(this);


JTextField numHours = new JTextField(10);


boxPanel.add(OilChange);
boxPanel.add(LubeJob);
boxPanel.add(Radiator);
boxPanel.add(Transmission);
boxPanel.add(Inspection);
boxPanel.add(Muffler);
boxPanel.add(TireRot);

add(boxPanel);
add(hourPanel);
add(totalPanel);
setVisible(true);

}
public double getBoxCost()
{
double boxCost = 0;
if (OilChange.isSelected())
boxCost += OIL;
if (LubeJob.isSelected())
boxCost += LUBE;
if (Radiator.isSelected())
boxCost += RAD;
if (Transmission.isSelected())
boxCost += TRANS;
if (Inspection.isSelected())
boxCost += INSP;
if (Muffler.isSelected())
boxCost += MUF;
if (TireRot.isSelected())
boxCost += TIRE;

return boxCost;
}

public double getHoursCost()
{

String input;
double hoursTotal = 0;

input = numHours.getText();
hoursTotal += (Double.parseDouble(input) * 20);

return hoursTotal;

}

public void TotalCost()
{
String TotalCost;
TotalCost = Double.toString(getBoxCost() + getHoursCost());
total.setText(TotalCost);
}

public void itemStateChanged(ItemEvent e)
{

}

public void actionPerformed(ActionEvent e)
{

}


public static void main(String[] Args)
{
JoesAutoShop s1 = new JoesAutoShop();
}

}

Explanation / Answer

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

import javax.swing.event.*;
import java.text.DecimalFormat;

@SuppressWarnings("serial")
public class JoesAutoShop extends JFrame implements ItemListener, ActionListener {

    private static final double OIL_CHANGE = 26.00;
    private static final double LUBE_JOB = 18.00;
    private static final double RADIATOR_FLUSH = 30.00;
    private static final double TRANSMISSION_FLUSH = 80.00;
    private static final double INSPECTION = 15.00;
    private static final double MUFFLER_REPLACEMENT = 100.00;
    private static final double TIRE_ROTATION = 20.00;
    
    private JPanel    boxPanel;
    
    private JCheckBox oilChange;
    private JCheckBox lubeJob;
    private JCheckBox radiatorFlush;
    private JCheckBox transmissionFlush;
    private JCheckBox inspection;
    private JCheckBox mufflerReplacement;
    private JCheckBox tireRotation;
    
    private JTextField totalHoursWorked;
    private JLabel    hoursLabel;
    private JButton   calculate;
    private JLabel    totalAmount;

    public JoesAutoShop() {
        setSize(300, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Joes Auto Shop");

        setLayout(new BorderLayout());
        boxPanel = new JPanel(new GridLayout(0, 1));

        totalHoursWorked = new JTextField(10);
        totalHoursWorked.setText("0");

        hoursLabel = new JLabel("Enter Hours Worked :");
        
        calculate = new JButton("Calculate");
        calculate.addActionListener(this);

        oilChange = new JCheckBox("Oil Change: $26.00");
        oilChange.setName("OIL");
        oilChange.addItemListener(this);

        lubeJob = new JCheckBox("Lube Jobe: $18.00");
        lubeJob.setName("LUBE");
        lubeJob.addItemListener(this);

        radiatorFlush = new JCheckBox("Radiator flush: $30.00");
        radiatorFlush.setName("RADIATOR");
        radiatorFlush.addItemListener(this);

        transmissionFlush = new JCheckBox("Transmission flush: $80.00");
        transmissionFlush.setName("TRANSMISSION");
        transmissionFlush.addItemListener(this);


        inspection = new JCheckBox("Inspection: $15.00");
        inspection.setName("INSPECTION");
        inspection.addItemListener(this);

        mufflerReplacement = new JCheckBox("Muffler replacement: $100.00");
        mufflerReplacement.setName("MUFFLER");
        mufflerReplacement.addItemListener(this);

        tireRotation = new JCheckBox("Tire rotation: $20.00");
        tireRotation.setName("ROTATION");
        tireRotation.addItemListener(this);

        Font displayFont = new Font("Serif", Font.BOLD, 18);
        totalAmount = new JLabel();
        totalAmount.setFont(displayFont);
        totalAmount.setText("Total Amount : $0.00");


        JTextField numHours = new JTextField(10);


        boxPanel.add(oilChange);
        boxPanel.add(lubeJob);
        boxPanel.add(radiatorFlush);
        boxPanel.add(transmissionFlush);
        boxPanel.add(inspection);
        boxPanel.add(mufflerReplacement);
        boxPanel.add(tireRotation);
        boxPanel.add(calculate);
        boxPanel.add(hoursLabel);
        boxPanel.add(totalHoursWorked);
        boxPanel.add(totalAmount);

        add(boxPanel, BorderLayout.CENTER);
        setVisible(true);

    }

    public double getBoxCost() {
        double boxCost = 0;
        if (oilChange.isSelected()) {
            boxCost += OIL_CHANGE;
        }
        if (lubeJob.isSelected()) {
            boxCost += LUBE_JOB;
        }
        if (radiatorFlush.isSelected()) {
            boxCost += RADIATOR_FLUSH;
        }
        if (transmissionFlush.isSelected()) {
            boxCost += TRANSMISSION_FLUSH;
        }
        if (inspection.isSelected()) {
            boxCost += INSPECTION;
        }
        if (mufflerReplacement.isSelected()) {
            boxCost += MUFFLER_REPLACEMENT;
        }
        if (tireRotation.isSelected()) {
            boxCost += TIRE_ROTATION;
        }

        return boxCost;
    }

    public double getHoursCost() {
    
    String input;
    double hoursTotal = 0;
    
    input = totalHoursWorked.getText();
    hoursTotal += (Integer.parseInt(input) * 20);
    System.out.println(hoursTotal);   
    return hoursTotal;
    
    }

    public void getTotalCost() {
    double total = getBoxCost() + getHoursCost();
    totalAmount.setText("Total Amount : $"+total);
    }
    public void itemStateChanged(ItemEvent e) {
        getTotalCost();
    }

    public void actionPerformed(ActionEvent e) {
          getTotalCost();
    }

    public static void main(String[] Args) {
        JoesAutoShop s1 = new JoesAutoShop();
    }
}
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

import javax.swing.event.*;
import java.text.DecimalFormat;

@SuppressWarnings("serial")
public class JoesAutoShop extends JFrame implements ItemListener, ActionListener {

    private static final double OIL_CHANGE = 26.00;
    private static final double LUBE_JOB = 18.00;
    private static final double RADIATOR_FLUSH = 30.00;
    private static final double TRANSMISSION_FLUSH = 80.00;
    private static final double INSPECTION = 15.00;
    private static final double MUFFLER_REPLACEMENT = 100.00;
    private static final double TIRE_ROTATION = 20.00;
    
    private JPanel    boxPanel;
    
    private JCheckBox oilChange;
    private JCheckBox lubeJob;
    private JCheckBox radiatorFlush;
    private JCheckBox transmissionFlush;
    private JCheckBox inspection;
    private JCheckBox mufflerReplacement;
    private JCheckBox tireRotation;
    
    private JTextField totalHoursWorked;
    private JLabel    hoursLabel;
    private JButton   calculate;
    private JLabel    totalAmount;

    public JoesAutoShop() {
        setSize(300, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Joes Auto Shop");

        setLayout(new BorderLayout());
        boxPanel = new JPanel(new GridLayout(0, 1));

        totalHoursWorked = new JTextField(10);
        totalHoursWorked.setText("0");

        hoursLabel = new JLabel("Enter Hours Worked :");
        
        calculate = new JButton("Calculate");
        calculate.addActionListener(this);

        oilChange = new JCheckBox("Oil Change: $26.00");
        oilChange.setName("OIL");
        oilChange.addItemListener(this);

        lubeJob = new JCheckBox("Lube Jobe: $18.00");
        lubeJob.setName("LUBE");
        lubeJob.addItemListener(this);

        radiatorFlush = new JCheckBox("Radiator flush: $30.00");
        radiatorFlush.setName("RADIATOR");
        radiatorFlush.addItemListener(this);

        transmissionFlush = new JCheckBox("Transmission flush: $80.00");
        transmissionFlush.setName("TRANSMISSION");
        transmissionFlush.addItemListener(this);


        inspection = new JCheckBox("Inspection: $15.00");
        inspection.setName("INSPECTION");
        inspection.addItemListener(this);

        mufflerReplacement = new JCheckBox("Muffler replacement: $100.00");
        mufflerReplacement.setName("MUFFLER");
        mufflerReplacement.addItemListener(this);

        tireRotation = new JCheckBox("Tire rotation: $20.00");
        tireRotation.setName("ROTATION");
        tireRotation.addItemListener(this);

        Font displayFont = new Font("Serif", Font.BOLD, 18);
        totalAmount = new JLabel();
        totalAmount.setFont(displayFont);
        totalAmount.setText("Total Amount : $0.00");


        JTextField numHours = new JTextField(10);


        boxPanel.add(oilChange);
        boxPanel.add(lubeJob);
        boxPanel.add(radiatorFlush);
        boxPanel.add(transmissionFlush);
        boxPanel.add(inspection);
        boxPanel.add(mufflerReplacement);
        boxPanel.add(tireRotation);
        boxPanel.add(calculate);
        boxPanel.add(hoursLabel);
        boxPanel.add(totalHoursWorked);
        boxPanel.add(totalAmount);

        add(boxPanel, BorderLayout.CENTER);
        setVisible(true);

    }

    public double getBoxCost() {
        double boxCost = 0;
        if (oilChange.isSelected()) {
            boxCost += OIL_CHANGE;
        }
        if (lubeJob.isSelected()) {
            boxCost += LUBE_JOB;
        }
        if (radiatorFlush.isSelected()) {
            boxCost += RADIATOR_FLUSH;
        }
        if (transmissionFlush.isSelected()) {
            boxCost += TRANSMISSION_FLUSH;
        }
        if (inspection.isSelected()) {
            boxCost += INSPECTION;
        }
        if (mufflerReplacement.isSelected()) {
            boxCost += MUFFLER_REPLACEMENT;
        }
        if (tireRotation.isSelected()) {
            boxCost += TIRE_ROTATION;
        }

        return boxCost;
    }

    public double getHoursCost() {
    
    String input;
    double hoursTotal = 0;
    
    input = totalHoursWorked.getText();
    hoursTotal += (Integer.parseInt(input) * 20);
    System.out.println(hoursTotal);   
    return hoursTotal;
    
    }

    public void getTotalCost() {
    double total = getBoxCost() + getHoursCost();
    totalAmount.setText("Total Amount : $"+total);
    }
    public void itemStateChanged(ItemEvent e) {
        getTotalCost();
    }

    public void actionPerformed(ActionEvent e) {
          getTotalCost();
    }

    public static void main(String[] Args) {
        JoesAutoShop s1 = new JoesAutoShop();
    }
}

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