Error at the begining of my code

I'm not sure what's wrong with my code. Its at the first public class VolCalc line.

[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("
");
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("
");
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);
}
}[/code]

Comments

  • Hey,
    Reason for error on class declaration line: if a class implements an interface, ActionListener, then it must implement its abstract classes, ie. actionPerformed.
    Add the following method after the variable declarations to bypass that error
    [code]public void actionPerformed(ActionEvent arg0) {
    // not sure what you want to do here
    }[/code]
    Also constructor name must match class name and not use a return variable, ie.
    [code]
    //Constructor name must match class name and not use a return variable
    // public void CalcVolume() {

    public VolCalc() {
    [/code]

    regards, se52
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