swimming pool calculator

i'm writing a program to calculate the measurements of a swimming pool & a hot tub. and then the user can enter information about the customer & contractor. when the code run,i just get an empty box. my code is below. any help would be greatly appreciated.

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.text.DecimalFormat;
import javax.swing.ButtonGroup;
import java.awt.FlowLayout;

public class VolCalc extends JFrame implements ActionListener
{ 
    private JTabbedPane jtabbedPane; 
    private JPanel general; 
    private JPanel pools; 
    private JPanel Contractors; 
    private JPanel Customers; 
    private JPanel tempCalc; 
    private JPanel options; 
    private JPanel hotTub; 
    private JComponent date; 

    JTextField lengthText, widthText, depthText, volumeText; 

public void CalcVolume()
{
    JPanel customers = new JPanel();
    customers = createCustomers();
    setSize(400, 250);
    setVisible(true);

    JPanel contractors = new JPanel();
    contractors = createContractors();
    setSize(400,250);
    setVisible(true);

    setTitle("Pools"); 
    setSize(300, 200); 

    JPanel topPanel = new JPanel(); 
    topPanel.setLayout( new BorderLayout() ); 
    getContentPane().add( topPanel ); 

    createGeneral(); 
    createPools(); 
    createContractors(); 
    createTempCalc(); 
    createCustomers(); 
    createOptions(); 
    createhotTub(); 

    jtabbedPane = new JTabbedPane(); 
    jtabbedPane.addTab("General", general); 
    jtabbedPane.addTab("Pools", pools); 
    jtabbedPane.addTab("Contractors", contractors); 
    jtabbedPane.addTab("Customers", customers); 
    jtabbedPane.addTab("Temp Calculator", tempCalc); 
    jtabbedPane.addTab("Options", options); 
    jtabbedPane.addTab("Hot Tubs", hotTub);

    topPanel.add(jtabbedPane, BorderLayout.CENTER); 
}

private void createOptions() 
{
}

private void createTempCalc() 
{
}

private JPanel createCustomers() 
{
    return null;
}

/*      CREATE GENERAL    */

public void createGeneral()
{ 
    general = new JPanel(); 
    general.setLayout(null); 

    JLabel dateLabel = new JLabel("Todays Date"); 
    dateLabel.setBounds(10, 15, 150, 20); 
    general.add(dateLabel); 

    JFormattedTextField date = new JFormattedTextField( 
    java.util.Calendar.getInstance().getTime()); 
    date.setEditable(false); 
    date.setBounds(150,15,150,20); 
    general.add(date); 

    JButton Exit = new JButton("Exit"); 
    Exit.setBounds(10,80,150,30); 
    Exit.addActionListener(this); 
    Exit.setBackground(Color.red); 
    general.add(Exit); 
}

/*      CREATE POOLS    */

public void createPools()
{ 
    pools = new JPanel(); 
    pools.setLayout(null); 

    JLabel lengthLabel = new JLabel( "Enter the length of swimming pool(ft):"); 
    lengthLabel.setBounds(10, 15, 260, 20); 
    pools.add(lengthLabel); 

    lengthText = new JTextField(); 
    lengthText.setBounds( 260, 15, 150, 20 ); 
    pools.add( lengthText ); 

    JLabel widthLabel = new JLabel("Enter the width of the swimming pool(ft):"); 
    widthLabel.setBounds(10, 60, 260, 20); 
    pools.add(widthLabel); 

    widthText = new JTextField(); 
    widthText.setBounds(260, 60, 150, 20); 
    pools.add(widthText); 

    JLabel depthLabel = new JLabel("Enter the average depth the swimming pool(ft):"); 
    depthLabel.setBounds(10, 100, 260, 20); 
    pools.add( depthLabel); 

    depthText = new JTextField(); 
    depthText.setBounds(260, 100, 150, 20); 
    pools.add(depthText); 

    JLabel volumeLabel = new JLabel("The pool volume is:(ft ^3"); 
    volumeLabel.setBounds(10, 200, 260, 20); 
    pools.add(volumeLabel); 

    volumeText = new JTextField(); 
    volumeText.setBounds(260, 200, 150, 20); 
    volumeText.setEditable(false); 
    pools.add(volumeText); 

    JButton calcVolume = new JButton("Calculate Volume"); 
    calcVolume.setBounds(150,250,150,30); 
    calcVolume.addActionListener(this); 

    pools.add(calcVolume); 

    JButton Exit = new JButton("Exit"); 
    Exit.setBounds(350,250,80,30); 
    Exit.addActionListener(this); 
    Exit.setBackground(Color.white); 
    pools.add(Exit); 
}

/*      CREATE HOT TUB    */

public void createhotTub() 
{ 
    hotTub = new JPanel(); 
    hotTub.setLayout(null); 

    final JTextArea labelTubStatus = new JTextArea(6,30); 
    final JTextArea textFieldTubResult = new JTextArea(6,30); 
    final JTextArea textFieldTubWidth = new JTextArea(6,30); 

    JLabel lengthLabel = new JLabel("Enter the length of swimming pool(ft):"); 
    lengthLabel.setBounds(10, 15, 260, 20); 
    hotTub.add( lengthLabel ); 

    lengthText = new JTextField(); 
    lengthText.setBounds(260, 15, 150, 20); 
    hotTub.add(lengthText); 

    JLabel widthLabel = new JLabel("Enter the width of the swimming pool(ft):"); 
    widthLabel.setBounds(10, 60, 260, 20); 
    hotTub.add( widthLabel ); 

    widthText = new JTextField(); 
    widthText.setBounds(260, 60, 150, 20); 
    hotTub.add(widthText); 

    JLabel depthLabel = new JLabel("Enter the average depth the swimming pool(ft):"); 
    depthLabel.setBounds(10, 100, 260, 20); 
    hotTub.add( depthLabel ); 

    depthText = new JTextField(); 
    depthText.setBounds(260, 100, 150, 20); 
    hotTub.add( depthText ); 

    JLabel volumeLabel = new JLabel("The pool volume is:(ft ^3"); 
    volumeLabel.setBounds(10, 200, 260, 20); 
    hotTub.add(volumeLabel); 

    volumeText = new JTextField(); 
    volumeText.setBounds(260, 200, 150, 20); 
    volumeText.setEditable(false); 
    hotTub.add(volumeText); 

    final JRadioButton rdbtnRoundTub = new JRadioButton("RoundTub"); 
    rdbtnRoundTub.addActionListener(new ActionListener()
    { 

public void actionPerformed(ActionEvent arg0)
{ 
    textFieldTubWidth.setEditable(false); 
} 
}
);
    rdbtnRoundTub.setSelected(true); 
    rdbtnRoundTub.setBounds(79, 7, 109, 23); 
    hotTub.add(rdbtnRoundTub); 

    JRadioButton rdbtnOvalTub = new JRadioButton("Oval Tub"); 
    rdbtnOvalTub.addActionListener(new ActionListener() 
    {

public void actionPerformed(ActionEvent arg0) 
{ 
    textFieldTubWidth.setEditable(true); 
} 
}); 
    rdbtnOvalTub.setBounds(201, 7, 109, 23); 
    hotTub.add(rdbtnOvalTub); 

    ButtonGroup radioBtnGroup = new ButtonGroup(); 
    radioBtnGroup.add(rdbtnRoundTub); 
    radioBtnGroup.add(rdbtnOvalTub); 

    JButton btnCalculateVlmn = new JButton("Calculate Volume"); 
    btnCalculateVlmn.setMnemonic('C'); 

    btnCalculateVlmn.addActionListener(new ActionListener()
    {

public void actionPerformed(ActionEvent arg0)
{ 
    double width = 0, length = 0, depth = 0, volume = 0; 
    try
    { 
         if(rdbtnRoundTub.isSelected())
         { 
           volume = Math.PI * Math.pow(length / 2.0, 2) * depth;
         } 
              else
              { 
                volume = Math.PI * Math.pow(length * width, 2) * depth;
              } 
                DecimalFormat formatter = new DecimalFormat("#,###,###.###"); 
                volumeText.setText(""+formatter.format(volume)); 
    } 

    catch(NumberFormatException e) 
{ 
    labelTubStatus.setText("Fill out all fields!!"); 
} 
} 
}); 
    btnCalculateVlmn.setBounds(47, 115, 141, 23); 
    hotTub.add(btnCalculateVlmn); 

}

public JPanel createContractors()
{ 

/*        CONTRACTOR         */

    JTextField contName; 
    JTextField contCity; 
    JTextField contState; 
    JTextField contZip; 
    JTextField contPhone; 
    JTextField contAdd;

    final JTextArea contArea = new JTextArea(6, 30); 
    final JTextArea contMessage;

    JTextArea contAddMessage; 
    JButton addContractor = new JButton("Add Contractor"); 

    addContractor.setMnemonic('a'); 

    JPanel contPanel = new JPanel(); 
    contArea.setText("Select Add Contractor to add contractor. Select Refresh to refresh this pane."); 
    contArea.setLineWrap(true); 
    contArea.setWrapStyleWord(true); 
    JButton contRefButton = new JButton("Refresh"); 
    contMessage = new JTextArea(2, 30); 
    contMessage.setLineWrap(true); 
    contMessage.setWrapStyleWord(true); 

    addContractor.addActionListener(new ActionListener() 
{ 

public void actionPerformed(ActionEvent e) 
     {
        new Contractor("Contractor"); 
     }
});

    contPanel.add(contArea); 
    contPanel.add(addContractor); 
    contPanel.add(contRefButton); 
    contPanel.add(contMessage); 
    contRefButton.setMnemonic('R'); 
    contRefButton.addActionListener(new ActionListener() 
   {

public void actionPerformed(ActionEvent e) 
   { 
        contMessage.setText("");

        try
        { 
            File contOpen = new File("contractor.txt"); 
            FileReader contAreaIn = new FileReader(contOpen); 
            contArea.read(contAreaIn, contOpen.toString()); 
            contMessage.setText("The file exists and can be read from."); 
        }

      catch (IOException e3)
      { 
        contMessage.setText("The file could not be read. " + e3.getMessage()); 
      } 
    } 
}); 

    return contPanel; 
} 

class Contractor extends JFrame implements ActionListener 
{ 
    private String[] states = {"AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", 
          "FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", 
          "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", 
          "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", 
          "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY"};

    private JComboBox StateList = new JComboBox(states); 
    private JTextField NameText = new JTextField(25); 
    private JTextField AddressText = new JTextField(25); 
    private JTextField CityText = new JTextField(25); 
    private JTextField ZipText = new JTextField(9); 
    private JTextField PhoneText = new JTextField(10); 
    private JTextField PopMessageText = new JTextField(30); 
    private static final long serialVersionUID = 1L; 

    private AddContButtonHandler addContHandler = new AddContButtonHandler(); 

public Contractor(String who) 
{ 
    popUpWindow(who); 
} 

public void popUpWindow(final String who) 
{
    final JFrame popWindow;

    popWindow = new JFrame(who); 
    popWindow.setSize(425, 350); 
    popWindow.setLocation(100, 100); 
    popWindow.setVisible(true); 
    setDefaultCloseOperation(EXIT_ON_CLOSE); 

    Container c = new Container(); 
    popWindow.add(c); 
    c.setLayout(new FlowLayout()); 

    JPanel one = new JPanel(); 
    JPanel two = new JPanel(); 
    JPanel three = new JPanel(); 
    JPanel four = new JPanel(); 
    JPanel five = new JPanel(); 
    JPanel six = new JPanel(); 

    one.add(new JLabel(who + "Name")); 
    one.add(NameText); 
    two.add(new JLabel("Address")); 
    two.add(AddressText); 
    three.add(new JLabel("City")); 
    three.add(CityText); 
    four.add(new JLabel("State")); 
    StateList.setSelectedIndex(0); 
    four.add(StateList); 
    four.add(new JLabel("ZIP")); 
    four.add(ZipText); 
    four.add(new JLabel("Phone"));
    four.add(PhoneText); 
    JButton addwho = new JButton("Add " + who); 
    addwho.setMnemonic('A'); 
    JButton close = new JButton("Close"); 
    close.setMnemonic('C'); 
    JButton deleteFile = new JButton("Delete File"); 
    deleteFile.setMnemonic('D'); 
    five.add(addwho); 
    five.add(close); 
    five.add(deleteFile); 
    PopMessageText.setEditable(false); 
    PopMessageText.setHorizontalAlignment(JTextField.CENTER); 

    six.add(PopMessageText); 
    c.add(one); 
    c.add(two); 
    c.add(three); 
    c.add(four); 
    c.add(five); 
    c.add(six); 

    deleteFile.setToolTipText("Delete File"); 
    addwho.setToolTipText("Add "+ who); 
    close.setToolTipText("Close"); 

    if (who == "Contractor") 
        addwho.addActionListener(addContHandler);

        close.addActionListener(new ActionListener() 
        { 

public void actionPerformed(ActionEvent e) 
{ 
    NameText.setText(""); 
    AddressText.setText(""); 
    CityText.setText(""); 
    ZipText.setText(""); 
    PhoneText.setText(""); 
    PopMessageText.setText(""); 
    popWindow.dispose(); 
} 
}); 

        deleteFile.addActionListener(new ActionListener() 
        { 

     public void actionPerformed(ActionEvent e) 
     { 
          PopMessageText.setText("");

          if (who == "Contractor") 
          { 
              File file = new File("Contractor.txt");

              boolean contFileDeleted = file.delete();

              if (contFileDeleted) 
              { 
                  PopMessageText 
                  .setText("Contractor file has been deleted"); 
              }

              else 
              { 
                  PopMessageText 
                  .setText("There was an erron in deleting file"); 
              } 
          } 
      } 
}); 
}

class AddContButtonHandler implements ActionListener 
{ 
    public void actionPerformed(ActionEvent addContHandler) 
    { 
         int StateIndex; 
         try 
         { 
             File file = new File("Contractor.txt"); 

             boolean success = file.createNewFile(); 

             if (success) 
             { 
                  PopMessageText 
                  .setText("Contractor.txt file created file added"); 
             }

             else if (file.canWrite()) 
             { 
                  PopMessageText 
                  .setText("Writing data to Contractor.txt, file added"); 
             }

             else 
             { 
                  PopMessageText.setText("Cannot create file: Contractor.txt"); 
             }

             try 
             { 
                   FileWriter fileW = new FileWriter("Contractor.txt", true); 
                   fileW.write(NameText.getText()); 
                   fileW.write(","); 
                   fileW.write(AddressText.getText()); 
                   fileW.write(","); 
                   fileW.write(CityText.getText()); 
                   fileW.write(","); 
                   StateIndex = StateList.getSelectedIndex(); 
                   fileW.write(states[StateIndex]); 
                   fileW.write(","); 
                   fileW.write(ZipText.getText()); 
                   fileW.write(","); 
                   fileW.write(PhoneText.getText()); 
                   fileW.write("\r\n"); 
                   fileW.close(); 
                   PopMessageText.setText("A new Contractor has been added!"); 

                   FileReader fileR = new FileReader("Contractor.txt"); 
                   BufferedReader buffIn = new BufferedReader(fileR); 

                   String textData = buffIn.readLine(); 
                   buffIn.close(); 
             }

              catch (IOException e1) 
              { 
                   JOptionPane.showMessageDialog(null, e1.getMessage(), "ERROR", 2);
              } 
                   NameText.setText(""); 
                   AddressText.setText(""); 
                   CityText.setText(""); 
                   ZipText.setText(""); 
                   PhoneText.setText(""); 
         } 

         catch (IOException e1) 
         { 
         } 
} 
}

/*      CREATE CUSTOMERS    */

public JPanel createCustomers() 
{ 
    JTextField custName; 
    JTextField custCity; 
    JTextField custState; 
    JTextField custZip; 
    JTextField custPhone; 
    JTextField custAdd;

    final JTextArea custArea = new JTextArea(6, 30); 
    final JTextArea custMessage;

    JTextArea custAddMessage; 
    JButton addCustomer = new JButton("Add Customer"); 

    addCustomer.setMnemonic('a'); 

/*      CUSTOMER PANEL      */

    JPanel custPanel = new JPanel(); 
    custArea.setText("Select Add Customer to add customer. Select Refresh to refresh this pane."); 
    custArea.setForeground(Color.orange); 
    custArea.setLineWrap(true); 
    custArea.setWrapStyleWord(true); 
    JButton custRefButton = new JButton("Refresh"); 
    custMessage = new JTextArea(2, 30); 
    custMessage.setLineWrap(true); 
    custMessage.setWrapStyleWord(true); 

    addCustomer.addActionListener(new ActionListener() 
{ 

public void actionPerformed(ActionEvent e) 
{
    new Customer("Customer"); 
}
});
    custPanel.add(custArea); 
    custPanel.add(addCustomer); 

    custPanel.add(custRefButton); 
    custPanel.add(custMessage); 
    custRefButton.setMnemonic('R'); 

    custRefButton.addActionListener(new ActionListener() 
{

public void actionPerformed(ActionEvent e) 
{ 
    custMessage.setText("");

try
{ 
    File custOpen = new File("customer.txt"); 
    FileReader custAreaIn = new FileReader(custOpen); 
    custArea.read(custAreaIn, custOpen.toString()); 
    custMessage.setText("The file exists and can be read from."); 
} 
    catch (IOException e3)
    {
        custMessage.setText("The file could not be read. " + e3.getMessage()); 
    } 
} 
}); 
    return custPanel; 
} 

class Customer extends JFrame 
{ 
    private String[] states = {"AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", 
                           "FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", 
                           "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", 
                           "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", 
                           "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY"};

    private JComboBox StateList = new JComboBox(states); 
    private JTextField NameText = new JTextField(25); 
    private JTextField AddressText = new JTextField(25); 
    private JTextField CityText = new JTextField(25); 
    private JTextField ZipText = new JTextField(9); 
    private JTextField PhoneText = new JTextField(10); 
    private JTextField PopMessageText = new JTextField(30); 
    private static final long serialVersionUID = 1L; 

    private AddCustButtonHandler addCusHandler = new AddCustButtonHandler(); 

public Customer(String who) 
{ 
    popUpWindow(who); 
} 

public void popUpWindow(final String who) 
{ 

    final JFrame popWindow; 
    popWindow = new JFrame(who); 
    popWindow.setSize(425, 350); 
    popWindow.setLocation(100, 100); 
    popWindow.setVisible(true); 
    setDefaultCloseOperation(EXIT_ON_CLOSE); 

    Container c = new Container(); 

    popWindow.add(c); 

    c.setLayout(new FlowLayout()); 

    JPanel one = new JPanel(); 
    JPanel two = new JPanel(); 
    JPanel three = new JPanel(); 
    JPanel four = new JPanel(); 
    JPanel five = new JPanel(); 
    JPanel six = new JPanel(); 

    one.add(new JLabel(who + " Name ")); 
    one.add(NameText); 
    two.add(new JLabel("Address ")); 
    two.add(AddressText); 
    three.add(new JLabel("City ")); 
    three.add(CityText); 
    four.add(new JLabel("State ")); 
    StateList.setSelectedIndex(0); 
    four.add(StateList); 
    four.add(new JLabel("ZIP")); 
    four.add(ZipText); 
    four.add(new JLabel("Phone")); 
    four.add(PhoneText); 
    JButton addwho = new JButton("Add " + who); 
    addwho.setMnemonic('A'); 
    JButton close = new JButton("Close"); 
    close.setMnemonic('C'); 
    JButton deleteFile = new JButton("Delete File"); 
    deleteFile.setMnemonic('D'); 
    five.add(addwho); 
    five.add(close); 
    five.add(deleteFile); 
    PopMessageText.setEditable(false); 
    PopMessageText.setHorizontalAlignment(JTextField.CENTER); 

    six.add(PopMessageText); 
    c.add(one); 
    c.add(two); 
    c.add(three); 
    c.add(four); 
    c.add(five); 
    c.add(six); 

    deleteFile.setToolTipText("Delete File"); 
    addwho.setToolTipText("Add "+ who); 
    close.setToolTipText("Close"); 

    if (who == "Customer") 
      addwho.addActionListener(addCusHandler);
      close.addActionListener(new ActionListener() 
      {

public void actionPerformed(ActionEvent e) 
{ 
    NameText.setText(""); 
    AddressText.setText(""); 
    CityText.setText(""); 
    ZipText.setText(""); 
    PhoneText.setText(""); 
    PopMessageText.setText(""); 
    popWindow.dispose(); 
} 
}); 
    deleteFile.addActionListener(new ActionListener() 
    { 

public void actionPerformed(ActionEvent e) 
{ 
    PopMessageText.setText("");

    if (who == "Customer") 
    { 
        File file = new File("Customer.txt");

        boolean cusFileDeleted = file.delete();

        if (cusFileDeleted) 
        {
            PopMessageText 
            .setText("Customer file has been deleted"); 
        }

        else 
        {
            PopMessageText 
            .setText("There was an erron in deleting file"); 
        } 
    } 
} 
}); 
}

class AddCustButtonHandler implements ActionListener 
{

public void actionPerformed(ActionEvent addCusHandler) 
{ 
    int StateIndex; 
    try 
    { 
        File file = new File("Customer.txt"); 

        boolean success = file.createNewFile(); 

        if (success) 
        { 
            PopMessageText 
            .setText("Customer.txt file created file added"); 
        }

        else if (file.canWrite()) 
        { 
            PopMessageText 
            .setText("Writing data to Customer.txt, file added"); 
        }

        else 
        {
            PopMessageText.setText("Cannot create file: Customer.txt"); 
        }

        try 
        { 
            FileWriter fileW = new FileWriter("Customer.txt", true); 
            fileW.write(NameText.getText()); 
            fileW.write(","); 
            fileW.write(AddressText.getText()); 
            fileW.write(","); 
            fileW.write(CityText.getText()); 
            fileW.write(","); 
            StateIndex = StateList.getSelectedIndex(); 
            fileW.write(states[StateIndex]); 
            fileW.write(","); 
            fileW.write(ZipText.getText()); 
            fileW.write(","); 
            fileW.write(PhoneText.getText()); 
            fileW.write("\r\n"); 
            fileW.close(); 
            PopMessageText.setText("A new Customer has been added!"); 

            FileReader fileR = new FileReader("Customer.txt"); 
            BufferedReader buffIn = new BufferedReader(fileR); 

            String textData = buffIn.readLine(); 
            buffIn.close(); 
        }

        catch (IOException e1) 
        { 
            JOptionPane.showMessageDialog(null, e1.getMessage(), "ERROR", 2);
        }

        NameText.setText(""); 
        AddressText.setText(""); 
        CityText.setText(""); 
        ZipText.setText(""); 
        PhoneText.setText(""); 
    }

    catch (IOException e1) 
    { 
    } 

} 
} 
} 

/*      CREATE TEMPERATURE    */

public void createTempCalc()
{ 
    tempCalc = new JPanel(); 
    tempCalc.setLayout( null ); 
    JLabel tempLabel = new JLabel( "Enter temperature:" ); 
    tempLabel.setBounds( 10, 15, 260, 20 ); 
    tempCalc.add( tempLabel ); 

    JTextField temp = new JTextField(); 
    temp.setBounds( 260, 15, 150, 20 ); 
    tempCalc.add( temp ); 

    JLabel resultsLabel = new JLabel( "Calculated Temp:" ); 
    resultsLabel.setBounds( 10, 60, 260, 20 ); 
    tempCalc.add( resultsLabel ); 

    JTextField results = new JTextField(); 
    results.setBounds( 260, 60, 150, 20 ); 
    results.setEditable(false); 
    tempCalc.add( results ); 

    JButton calcVol = new JButton("Calculate Volume");
    calcVol.setBounds(100,115,150,30); 
    calcVol.addActionListener(this); 
    calcVol.setBackground(Color.yellow); 
    tempCalc.add(calcVol); 

    JButton Exit = new JButton("Exit"); 
    Exit.setBounds(250,115,80,30); 
    Exit.addActionListener(this); 
    Exit.setBackground(Color.red); 
    tempCalc.add(Exit); 
}

public void createOptions() 
{ 
    options = new JPanel(); 
    options.setLayout( null ); 
    JLabel labelOptions = new JLabel("Change Company Name:"); 
    labelOptions.setBounds( 150, 50, 150, 20 ); 
    options.add( labelOptions ); 

    JTextField newTitle = new JTextField(); 
    newTitle.setBounds( 150, 70, 150, 20 ); 
    options.add( newTitle ); 

    JButton newName = new JButton("Set New Name");
    newName.setBounds(100,115,150,30);
    newName.addActionListener(this);
    newName.setBackground(Color.yellow);
    options.add(newName);

    JButton Exit = new JButton("Exit");
    Exit.setBounds(250,115,80,30);
    Exit.addActionListener(this);
    Exit.setBackground(Color.red);
    options.add(Exit);
}

public void actionPerformed(ActionEvent event)
{ 
    JButton button = (JButton)event.getSource(); 
    String buttonLabel = button.getText();

    if ("Exit".equalsIgnoreCase(buttonLabel))
    {
        Exit_pressed(); return;
    }

        if ("Set New Name".equalsIgnoreCase(buttonLabel))
        {
            New_Name(); return; 
        }

        if ("Calculate Volume".equalsIgnoreCase(buttonLabel))
        {
            Calculate_Volume(); return; 
        }

        if ("Customers".equalsIgnoreCase(buttonLabel))
        {
            Customers(); return; 
        }

        if ("Calculate Volume".equalsIgnoreCase(buttonLabel))
        {
            Calculate_Volume(); return; 
        }

        if ("Options".equalsIgnoreCase(buttonLabel))
        {
            Options(); return; 
        }
    } 
}

private void Exit_pressed()
{ 
    System.exit(0); 
}

private void New_Name()
{ 
    System.exit(0); 
}

private void Calculate_Volume()
{
    String lengthString, widthString, depthString; 
    int length=0; 
    int width=0; 
    int depth=0; 

    lengthString = lengthText.getText(); 
    widthString = widthText.getText(); 
    depthString = depthText.getText();

    if (lengthString.length() < 1 || widthString.length() < 1 || depthString.length() < 1)
    {
        volumeText.setText("Error! Must enter in all three numbers!!"); 
        return; 
    }
       length = Integer.parseInt(lengthString ); 
       width = Integer.parseInt(widthString ); 
       depth = Integer.parseInt(depthString);

       if (length != 0 || width != 0 || depth != 0)
       {
           volumeText.setText((length * width * depth) + "" ); 
       }

       else
       {
           volumeText.setText("Error! Must Enter in all three numbers!!"); 
           return; 
       } 
   }

private void Customers()
{ 
} 
private void Options()
{
} 

public static void main(String[] args)
{ 
    JFrame frame = new VolCalc(); 
    frame.setSize(525, 350); 
    frame.setVisible(true); 
}

@Override

public void actionPerformed(ActionEvent e) 
{
    // TODO Auto-generated method stub

}
}

October 18, 2012 at 5:17 PM

Here is a code that calculate pool volume:

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

public class PoolVolume {
private JFrame mainFrame;
private JButton calcButton, exitButton;
private JTextField length, width, depth, volume;
private JLabel lengthLabel, widthLabel, depthLabel, volumeLabel;
public PoolVolume() {
mainFrame = new JFrame("Swimming Pool Volume Calculator");
calcButton = new JButton("Calculate volume");
exitButton = new JButton("Exit");
length = new JTextField(5);
width = new JTextField(5);
depth = new JTextField(5);
volume = new JTextField(5);
lengthLabel = new JLabel("Enter the length of the swimming pool: ");
widthLabel = new JLabel("Enter the width of the swimming pool: ");
depthLabel = new JLabel("Enter the depth dept of the swimming pool: ");
volumeLabel = new JLabel("Swimming pool volume: ");
JPanel c=new JPanel(new GridLayout(5,2));
c.add(lengthLabel);
c.add(length);
c.add(widthLabel);
c.add(width);
c.add(depthLabel);
c.add(depth);
c.add(volumeLabel);
c.add(volume);
c.add(calcButton);
c.add(exitButton);
calcButton.setMnemonic('C');
exitButton.setMnemonic('x');
mainFrame.setSize(500,200);
mainFrame.add(c);
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}});
calcButtonHandler chandler =new calcButtonHandler();
calcButton.addActionListener(chandler);
exitButtonHandler ehandler =new exitButtonHandler();
exitButton.addActionListener(ehandler);
FocusHandler fhandler =new FocusHandler();
length.addFocusListener(fhandler);
width.addFocusListener(fhandler);
depth.addFocusListener(fhandler);
volume.addFocusListener(fhandler);
mainFrame.setVisible(true);
}
class calcButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
DecimalFormat num =new DecimalFormat(",###.##");
Double cLength, cWidth, cdepth, cVolume, Total;
String sLength, sWidth, sdepth, sVolume;
sLength =length.getText();
cLength = Double.parseDouble(sLength);
sWidth =width.getText();
cWidth = Double.parseDouble(sWidth);
sdepth =depth.getText();
cdepth = Double.parseDouble(sdepth);
if(e.getSource() == calcButton) {
Total = cLength * cWidth * cdepth;
volume.setText(num.format(Total));
try{
String value=volume.getText();
File file = new File("output.txt");
FileWriter fstream = new FileWriter(file,true);
BufferedWriter out = new BufferedWriter(fstream);
out.write("Length= "+sLength+", Width= "+sWidth+", Depth= "+sdepth+" so the volume of Swimming Pool is "+value);
out.newLine();
out.close();
}
catch(Exception ex){}
}
}
}
class exitButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent e){
System.exit(0);
}
}
class FocusHandler implements FocusListener {
public void focusGained(FocusEvent e) {
}
public void focusLost(FocusEvent e) {
}
}
public static void main(String args[]){
new PoolVolume();
}
}

October 18, 2012 at 8:26 PM

thank you.

question. the tabs i want displayed, can i just add that code in below the code you provided or add your code into what i already have?

October 18, 2012 at 9:09 PM

better question is, how do i get the code i submitted to display? what am i doing wrong?