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Thread: Has to be a simple error, but I can't find it.

  1. #1
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    Default Has to be a simple error, but I can't find it.

    It is a pretty lengthy code. I am getting an error at this line:

    public class VolCalc extends JFrame implements ActionListener{

    Here is all of the code:

    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); 
                                          }
    }


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Has to be a simple error, but I can't find it.

    What's the error message? Could you post it? Likely what's happening is that you didn't implement the ActionPerformed method correctly (or at all).

  3. #3
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    Default Re: Has to be a simple error, but I can't find it.

    This is the error. A while back I got an error that turned out that I had some classes spelled different. One of them was "VolCac" as stated below. I have since then changed it, so I'm not sure why it shows up in the error.

    java.lang.NoClassDefFoundError: VolCac
    Caused by: java.lang.ClassNotFoundException: VolCac
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    Exception in thread "main"

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