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how to read from text file to labels

so i have program that need save to file and then read from it, i already have read from text file that works but i cant get read from the file working, i had it static before but teacher does not like it and make me to change it to read from file. i never used gui before and the only stuff what he show us in gui is how to place a button and text field.
private DefaultListModel<String> populateFlights() { // populate avalible flights to the list
DefaultListModel<String> list = new DefaultListModel<String>();
ArrayList<Flight> FlightList = MainMenu.getAirlineMgr().getFlightList();
// loop to get flight list
for (int i = 0; i < FlightList.size(); i++) {
list.addElement(FlightList.get(i).getFlightNumber());
}
return list;
}
private void PopulateAvailableSeats(Flight flight, JComboBox<String> cb) {
Seat lSeat;
cb.removeAllItems();
for (int i = 0; i < flight.getSeats().size(); i++) {
lSeat = flight.getSeats().get(i);
if (lSeat.getSeatstatus() == Seat.Status.AVAILABLE) {
cb.addItem(lSeat.getSeatNo());
}
}
}
private Double CalculateTotalCost(Flight flight, int discount, Boolean suitCase) {
Double total;
total = flight.getCost() - ((discount * flight.getCost()) / 100); // discount
if (suitCase) { // if statement to add suitcase if applyed
total = total + 50;
}
return total;
}
private void ConfirmBooking(Flight flight, Passenger passenger, String seatNumber, Boolean suitCase) {
Double totalCost = CalculateTotalCost(flight, passenger.getDiscount(), suitCase);
Seat lSeat = flight.getSeatByNumber(seatNumber);
// Assign the Passenger to Seat and change StatusSeat to RESERVED/booked
passenger.setSeatNo(lSeat.getSeatNo());
lSeat.setPassenger(passenger);
lSeat.setSeatstatus(Seat.Status.RESERVED);
// Create a booking
Book booking = new Book(passenger);
booking.setFlightToBook(flight);
booking.setSeat(lSeat);
booking.setSuitCase(suitCase);
booking.setTotalCost(totalCost);
// Assign booking to the passenger
passenger.setReservation(booking);
// Displays save dialog
try {
booking.SaveTicket();
} catch (IOException ioe) {
JOptionPane.showMessageDialog(null, "File Error");
}
}
private Boolean ValidateBooking(Flight flight) {
return (flight.getFlightStatus() == Flight.Status.AVAILABLE)
|| (flight.getFlightStatus() == Flight.Status.CHECKING);
}
public BookPanel() {
setBackground(new Color(176, 224, 230));
setLayout(null);
JLabel label = new JLabel("Departure Date:");
label.setBounds(10, 58, 112, 14);
add(label);
JLabel lblSelectAFlight = new JLabel("Select a flight:");
lblSelectAFlight.setFont(new Font("Tahoma", Font.BOLD, 11));
lblSelectAFlight.setBounds(10, 306, 121, 14);
add(lblSelectAFlight);
JLabel label_2 = new JLabel("Departure Airport:");
label_2.setBounds(10, 9, 112, 14);
add(label_2);
JLabel label_3 = new JLabel("Arrival Airport:");
label_3.setBounds(218, 9, 112, 14);
add(label_3);
JLabel label_4 = new JLabel("Arrival Date:");
label_4.setBounds(218, 58, 112, 14);
add(label_4);
JLabel lblFlightStatus1 = new JLabel("Flight Status:");
lblFlightStatus1.setBounds(10, 108, 99, 14);
add(lblFlightStatus1);
JLabel lbDepartureAirport = new JLabel("");
lbDepartureAirport.setForeground(Color.GREEN);
lbDepartureAirport.setBackground(Color.ORANGE);
lbDepartureAirport.setBounds(10, 33, 121, 14);
add(lbDepartureAirport);
JLabel lbDepartureDate = new JLabel("");
lbDepartureDate.setForeground(Color.GREEN);
lbDepartureDate.setBackground(Color.ORANGE);
lbDepartureDate.setBounds(10, 83, 183, 14);
add(lbDepartureDate);
JLabel lbArrivalAirport = new JLabel("");
lbArrivalAirport.setForeground(Color.MAGENTA);
lbArrivalAirport.setBackground(Color.ORANGE);
lbArrivalAirport.setBounds(218, 34, 121, 13);
add(lbArrivalAirport);
JLabel lbArrivalDate = new JLabel("");
lbArrivalDate.setForeground(Color.MAGENTA);
lbArrivalDate.setBackground(Color.ORANGE);
lbArrivalDate.setBounds(218, 83, 183, 14);
add(lbArrivalDate);
JLabel lblFlightStatus = new JLabel("");
lblFlightStatus
.setFont(lblFlightStatus.getFont().deriveFont(lblFlightStatus.getFont().getStyle() | Font.BOLD, 13f));
lblFlightStatus.setForeground(Color.BLACK);
lblFlightStatus.setBackground(Color.ORANGE);
lblFlightStatus.setBounds(10, 133, 99, 23);
add(lblFlightStatus);
JLabel lblPassengerInfo = new JLabel("Passenger info:");
lblPassengerInfo.setFont(new Font("Tahoma", Font.BOLD, 11));
lblPassengerInfo.setBounds(10, 167, 99, 14);
add(lblPassengerInfo);
JLabel lblName = new JLabel("Name:");
lblName.setBounds(10, 192, 69, 14);
add(lblName);
JLabel lbPassengerName = new JLabel("");
lbPassengerName.setFont(new Font("Tahoma", Font.BOLD, 12));
lbPassengerName.setBackground(Color.WHITE);
lbPassengerName.setBounds(99, 192, 187, 14);
add(lbPassengerName);
JLabel lbSureName = new JLabel("");
lbSureName.setFont(new Font("Tahoma", Font.BOLD, 12));
lbSureName.setBackground(Color.WHITE);
lbSureName.setBounds(99, 212, 187, 14);
add(lbSureName);
JLabel lblSureName = new JLabel("Sure Name:");
lblSureName.setBounds(10, 212, 73, 14);
add(lblSureName);
JLabel lblDiscount1 = new JLabel("Discount:");
lblDiscount1.setBounds(342, 182, 59, 14);
add(lblDiscount1);
JLabel lblDiscount = new JLabel("");
lblDiscount.setFont(new Font("Tahoma", Font.BOLD, 12));
lblDiscount.setBounds(342, 212, 59, 14);
add(lblDiscount);
JLabel lblCost = new JLabel("Cost:");
lblCost.setBounds(342, 133, 37, 14);
add(lblCost);
JSeparator separator = new JSeparator();
separator.setBounds(449, 144, 1, 2);
add(separator);
JSeparator separator_1 = new JSeparator();
separator_1.setOrientation(SwingConstants.VERTICAL);
separator_1.setBounds(412, 9, 13, 393);
add(separator_1);
JLabel lblType = new JLabel("Type:");
lblType.setBounds(10, 233, 73, 14);
add(lblType);
JLabel lbType = new JLabel("");
lbType.setFont(new Font("Tahoma", Font.BOLD, 12));
lbType.setBounds(103, 233, 187, 14);
add(lbType);
JComboBox<String> cbSeats = new JComboBox<String>();
cbSeats.setBounds(289, 313, 112, 20);
add(cbSeats);
JLabel lblAvailableSeats = new JLabel("Available seats:");
lblAvailableSeats.setBounds(196, 316, 112, 14);
add(lblAvailableSeats);
JLabel lbCost = new JLabel("");
lbCost.setFont(new Font("Tahoma", Font.BOLD, 12));
lbCost.setBounds(342, 157, 59, 14);
add(lbCost);
JLabel lblTotalCost1 = new JLabel("Total Cost:");
lblTotalCost1.setBounds(342, 233, 69, 14);
add(lblTotalCost1);
JLabel lblTotalCost = new JLabel("");
lblTotalCost.setFont(new Font("Tahoma", Font.BOLD, 14));
lblTotalCost.setBounds(328, 258, 73, 23);
add(lblTotalCost);
// Action for CheckBox
JCheckBox chckbxNewCheckBox = new JCheckBox("Suite case (+$50)");
chckbxNewCheckBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
lblTotalCost.setText(Double.toString(
CalculateTotalCost(flightSelected, passenger.getDiscount(), chckbxNewCheckBox.isSelected()))
+ "$");
}
});
chckbxNewCheckBox.setBounds(180, 272, 142, 23);
add(chckbxNewCheckBox);
// Action for button cancel
JButton button = new JButton("Cancel");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
MainMenu.hideBook();
}
});
button.setBounds(10, 379, 89, 23);
add(button);
// Action for button confirm
JButton btnPay = new JButton("Confirm");
btnPay.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
if (ValidateBooking(flightSelected)) {
ConfirmBooking(flightSelected, passenger, cbSeats.getSelectedItem().toString(),
chckbxNewCheckBox.isSelected());
// JOptionPane.showMessageDialog(null,
// directory.getAbsolutePath()));
MainMenu.hideBook();
} else {
JOptionPane.showMessageDialog(null, "The flight is not available");
}
}
});
btnPay.setBounds(312, 379, 89, 23);
add(btnPay);
// passenger info
passenger = MainMenu.getAirlineMgr().getPassenger();
if (passenger != null) {
lbPassengerName.setText(passenger.getFname());
lbSureName.setText(passenger.getSname());
lblDiscount.setText(Integer.toString(passenger.getDiscount()) + "%");
if (passenger.getClass() == Business.class) {
lbType.setText("BUSINESS");
} else {
if (passenger.getClass() == Ordinary.class) {
lbType.setText("ORDINARY");
} else {
if (passenger.getClass() == Island.class) {
lbType.setText("ISLAND");
}
}
}
}
// flight info
JList list = new JList(populateFlights());
list.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent arg0) {
flightSelected = MainMenu.getAirlineMgr().getFlightByNumber(list.getSelectedValue().toString());
lbDepartureAirport.setText(flightSelected.getDepartureAirport());
lbArrivalAirport.setText(flightSelected.getArrivalAirport());
lbDepartureDate.setText(flightSelected.getDepartureDate().toString());
lbArrivalDate.setText(flightSelected.getArrivalDate().toString());
lbCost.setText(Double.toString(flightSelected.getCost()) + "£");
PopulateAvailableSeats(flightSelected, cbSeats);
lblTotalCost.setText(Double.toString(
CalculateTotalCost(flightSelected, passenger.getDiscount(), chckbxNewCheckBox.isSelected()))
+ "£");
// if statement for STATUS
if (flightSelected.getFlightStatus() == Flight.Status.AVAILABLE) {
lblFlightStatus.setText("AVAILABLE");
} else {
if (flightSelected.getFlightStatus() == Flight.Status.BOARDING) {
lblFlightStatus.setText("BOARDING");
} else {
if (flightSelected.getFlightStatus() == Flight.Status.CHECKING) {
lblFlightStatus.setText("CHECKING");
} else {
if (flightSelected.getFlightStatus() == Flight.Status.CLOSED) {
lblFlightStatus.setText("CLOSED");
}
}
}
}
}
});
list.setBorder(new LineBorder(new Color(0, 0, 0), 1, true));
list.setBounds(104, 314, 89, 88);
add(list);
JLabel lblBookAFlight = new JLabel("Book a Flight");
lblBookAFlight.setFont(new Font("Tele-Marines", Font.PLAIN, 12));
lblBookAFlight.setBounds(140, 142, 81, 14);
add(lblBookAFlight);
}
}
oh yeah if this help here is save to the file code:pic of save to file

looping function and receiving bytes in java

public class InterfaceGUI implements ActionListener {
private JFrame frame;
private JPanel panelController;
private JPanel panelJack;
private JPanel panelModbus;
private JPanel panelLog;
private JPanel panelStatus;
private JPanel panelToController;
private JPanel panelToJack;
private JLabel lblIpAddController;
private JLabel lblPortController;
private JLabel lblIpAddJack;
private JLabel lblPortJack;
private JLabel lblStatusToController;
private JLabel lblStatusConnToCont;
private JLabel lblIpAddToController;
private JLabel lblIpAddConnToCont;
private JLabel lblPortToController;
private JLabel lblPortConnToCont;
private JLabel lblStatusToJack;
private JLabel lblStatusConnToJack;
private JLabel lblIpAddToJack;
private JLabel lblIpAddConnToJack;
private JLabel lblPortToJack;
private JLabel lblPortConnToJack;
private JLabel lblSlaveId;
private JLabel lblIcon;
private JButton btnConnController;
private JButton btnDiscController;
private JButton btnConnJack;
private JButton btnDiscJack;
private JButton btnConnModbus;
private JTextArea textAreaConnLog;
private JTextField textFieldIpAddController;
private JTextField textFieldPortController;
private JTextField textFieldIpAddJack;
private JTextField textFieldPortJack;
private JTextField textFieldSlaveId;
private Socket myClient;
public byte[] message = new byte[5];
private static final String modbusConn = "modbusconnect";
private static final String modbusDisc = "modbusdisconnect";
/**
* Launch the application.
*/
public static void main(String[] args){
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
InterfaceGUI window = new InterfaceGUI();
window.frame.setVisible(true);
//window.receiveMessage();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public InterfaceGUI() {
initialize();
}
public void startRunning() throws IOException{
try {
while (true){
System.out.println("receive");
InputStream inFromServer = myClient.getInputStream();
DataInputStream in = new DataInputStream(inFromServer);
in.read(message);
System.out.println(Arrays.toString(message));
}
} catch (EOFException eofexception){
System.out.println("error");
}
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 450, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
panelController = new JPanel();
panelController.setBorder(new TitledBorder(null, "Connection to Controller", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelController.setBounds(6, 6, 438, 95);
frame.getContentPane().add(panelController);
panelController.setLayout(null);
lblIpAddController = new JLabel("IP Address :");
lblIpAddController.setBounds(13, 24, 74, 16);
panelController.add(lblIpAddController);
textFieldIpAddController = new JTextField();
textFieldIpAddController.setBounds(92, 18, 174, 28);
panelController.add(textFieldIpAddController);
textFieldIpAddController.setColumns(10);
btnConnController = new JButton("Connect");
btnConnController.setBounds(278, 18, 154, 29);
panelController.add(btnConnController);
btnConnController.addActionListener(this);
lblPortController = new JLabel("Port :");
lblPortController.setBounds(54, 58, 33, 16);
panelController.add(lblPortController);
textFieldPortController = new JTextField();
textFieldPortController.setBounds(92, 52, 174, 28);
panelController.add(textFieldPortController);
textFieldPortController.setColumns(10);
btnDiscController = new JButton("Disconnect");
btnDiscController.setBounds(278, 52, 154, 29);
panelController.add(btnDiscController);
btnDiscController.addActionListener(this);
panelJack = new JPanel();
panelJack.setBorder(new TitledBorder(null, "Connection to Jack", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelJack.setBounds(6, 113, 289, 95);
frame.getContentPane().add(panelJack);
panelJack.setLayout(null);
lblIpAddJack = new JLabel("IP Address :");
lblIpAddJack.setBounds(14, 24, 74, 16);
panelJack.add(lblIpAddJack);
textFieldIpAddJack = new JTextField();
textFieldIpAddJack.setBounds(93, 18, 106, 28);
textFieldIpAddJack.setText("111.111.1.111");
panelJack.add(textFieldIpAddJack);
textFieldIpAddJack.setColumns(10);
btnConnJack = new JButton("Connect");
btnConnJack.setBounds(200, 20, 86, 29);
btnConnJack.setFont(new Font("Lucida Grande", Font.PLAIN, 11));
panelJack.add(btnConnJack);
lblPortJack = new JLabel("Port :");
lblPortJack.setBounds(55, 58, 33, 16);
panelJack.add(lblPortJack);
textFieldPortJack = new JTextField();
textFieldPortJack.setBounds(93, 52, 106, 28);
panelJack.add(textFieldPortJack);
textFieldPortJack.setColumns(10);
btnDiscJack = new JButton("Disconnect");
btnDiscJack.setBounds(200, 52, 86, 29);
btnDiscJack.setFont(new Font("Lucida Grande", Font.PLAIN, 11));
panelJack.add(btnDiscJack);
panelStatus = new JPanel();
panelStatus.setBorder(new TitledBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null), "Connection Status", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelStatus.setBounds(6, 220, 438, 126);
frame.getContentPane().add(panelStatus);
panelStatus.setLayout(null);
panelToController = new JPanel();
panelToController.setBorder(new TitledBorder(null, "Connection to Controller", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelToController.setBounds(6, 20, 208, 94);
panelStatus.add(panelToController);
panelToController.setLayout(null);
lblStatusToController = new JLabel("Status");
lblStatusToController.setBounds(41, 19, 39, 16);
panelToController.add(lblStatusToController);
lblStatusConnToCont = new JLabel("DISCONNECTED");
lblStatusConnToCont.setForeground(Color.RED);
lblStatusConnToCont.setBounds(85, 19, 117, 16);
lblStatusConnToCont.setHorizontalAlignment(SwingConstants.CENTER);
panelToController.add(lblStatusConnToCont);
lblIpAddToController = new JLabel("IP Address :");
lblIpAddToController.setBounds(6, 43, 74, 16);
panelToController.add(lblIpAddToController);
lblIpAddConnToCont = new JLabel("New label");
lblIpAddConnToCont.setBounds(113, 43, 61, 16);
lblIpAddConnToCont.setHorizontalAlignment(SwingConstants.CENTER);
panelToController.add(lblIpAddConnToCont);
lblPortToController = new JLabel("Port :");
lblPortToController.setBounds(47, 66, 33, 16);
panelToController.add(lblPortToController);
lblPortConnToCont = new JLabel("New label");
lblPortConnToCont.setBounds(113, 66, 61, 16);
lblPortConnToCont.setHorizontalAlignment(SwingConstants.CENTER);
panelToController.add(lblPortConnToCont);
panelToJack = new JPanel();
panelToJack.setBorder(new TitledBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null), "Connection to Jack", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelToJack.setBounds(218, 20, 214, 94);
panelStatus.add(panelToJack);
panelToJack.setLayout(null);
lblStatusToJack = new JLabel("Status");
lblStatusToJack.setBounds(41, 19, 39, 16);
panelToJack.add(lblStatusToJack);
lblStatusConnToJack = new JLabel("DISCONNECTED");
lblStatusConnToJack.setForeground(Color.RED);
lblStatusConnToJack.setBounds(85, 19, 123, 16);
lblStatusConnToJack.setHorizontalAlignment(SwingConstants.CENTER);
panelToJack.add(lblStatusConnToJack);
lblIpAddToJack = new JLabel("IP Address :");
lblIpAddToJack.setBounds(6, 43, 74, 16);
panelToJack.add(lblIpAddToJack);
lblIpAddConnToJack = new JLabel("New label");
lblIpAddConnToJack.setBounds(116, 43, 61, 16);
lblIpAddConnToJack.setHorizontalAlignment(SwingConstants.CENTER);
panelToJack.add(lblIpAddConnToJack);
lblPortToJack = new JLabel("Port :");
lblPortToJack.setBounds(47, 66, 33, 16);
panelToJack.add(lblPortToJack);
lblPortConnToJack = new JLabel("New label");
lblPortConnToJack.setBounds(116, 66, 61, 16);
lblPortConnToJack.setHorizontalAlignment(SwingConstants.CENTER);
panelToJack.add(lblPortConnToJack);
panelModbus = new JPanel();
panelModbus.setBorder(new TitledBorder(null, "Modbus", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelModbus.setBounds(296, 113, 148, 95);
frame.getContentPane().add(panelModbus);
panelModbus.setLayout(null);
lblSlaveId = new JLabel("ID :");
lblSlaveId.setBounds(33, 24, 22, 16);
panelModbus.add(lblSlaveId);
textFieldSlaveId = new JTextField();
textFieldSlaveId.setBounds(60, 18, 82, 28);
panelModbus.add(textFieldSlaveId);
textFieldSlaveId.setColumns(10);
lblIcon = new JLabel("icon");
lblIcon.setBounds(17, 52, 32, 35);
panelModbus.add(lblIcon);
Image imgDisconnect = new ImageIcon(this.getClass().getResource("red-unlock-icon.png")).getImage();
lblIcon.setIcon(new ImageIcon(imgDisconnect));
btnConnModbus = new JButton("Connect");
btnConnModbus.setBounds(60, 51, 82, 29);
panelModbus.add(btnConnModbus);
panelLog = new JPanel();
panelLog.setBorder(new TitledBorder(null, "Connection Log", TitledBorder.LEADING, TitledBorder.TOP, null, null));
panelLog.setBounds(6, 358, 438, 214);
frame.getContentPane().add(panelLog);
panelLog.setLayout(null);
textAreaConnLog = new JTextArea();
textAreaConnLog.setBounds(6, 19, 426, 189);
panelLog.add(textAreaConnLog);
}
#Override
public void actionPerformed(ActionEvent ae) {
// TODO Auto-generated method stub
if(ae.getSource() instanceof JButton){
if(ae.getSource() == btnConnController){
//check validity ip dan port number later on
try {
myClient = new Socket("192.168.1.104", 1234);
if(myClient.isConnected() == true){
textAreaConnLog.setText("connected to 192.168.1.104 at port 1234");
lblStatusConnToJack.setText("CONNECTED");
lblStatusConnToJack.setForeground(Color.GREEN);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
I am currently building a client program to receive broadcasted message by the server. Just want to make things clear, is it correct that the method startRunning() will keep looping itself without anyone calling it? Also, the incoming data is in the form of bytes, can i use the method .read(message) to read and store the data into message[]?

Is it correct that the method startRunning() will keep looping itself without anyone calling it?
You have to call the method startRunning() at least once so that it starts executing its code; after that the while block will continue to loop infinitly unless an exception occurs.
Also, the incoming data is in the form of bytes, can i use the method .read(message) to read and store the data into message[]?
Yes, you can. See this link for the specifications
If I might add a tip:
private boolean Continue = true;
public void setContinue(boolean b)
{
Continue = b;
}
public void startRunning() throws IOException
{
DataInputStream in;
try
{
while (Continue)
{
System.out.println("receive");
InputStream inFromServer = myClient.getInputStream();
in = new DataInputStream(inFromServer);
in.read(message);
System.out.println(Arrays.toString(message));
}
}
catch (EOFException eofexception)
{
System.out.println("error");
}
catch(Exception ex)
{
in.close();
throw ex;
}
}
Note the condition of the while-loop. This would make your code more responsive to interrupts, should you need them; streams should not be open infinitly.
Also, you ought to close the stream when an exception does occur.

JLabel does not show value from another class

I have two GUI classes. When I click a row in JTable in the first user interface, the second interface should display the corresponding values in JLabels.
But the second user interface does not show the values.
Here's my first GUI class:
public class ChequeGUI extends JFrame {
public String chqNo;
public String payName;
public double chkAmount = 10;
public Date chkDate;
JTable guiTable = new JTable();
DefaultTableModel model = new DefaultTableModel(new Object[][]{},new String[]{"Cheque Number","Payee Name","Cheque Amount","Cheque Date"});
public ChequeGUI() throws SQLException {
guiTable.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e){
//guiTable.getTableHeader().getDefaultRenderer();
int row = guiTable.getSelectedRow();
chqNo = (String) guiTable.getValueAt(row,0);
payName = (String) guiTable.getValueAt(row,1);
chkAmount = (Double) guiTable.getValueAt(row,2);
chkDate = (Date) guiTable.getValueAt(row, 3);
try {
PrintChequeGUI pcg = new PrintChequeGUI();
pcg.setTitle("Print Cheque");
pcg.setVisible(true);
System.out.println(chqNo);
System.out.println(payName);
System.out.println(chkAmount);
System.out.println(chkDate);
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
guiTable.setModel(model);
add(new JScrollPane(guiTable));
DBConnection connection = new DBConnection();
//Populate Table
ChequeDAOImpl chqdi = new ChequeDAOImpl();
chqdi.setConnection(connection);
List<Cheque> cheques = chqdi.getCheques();
for(Cheque cq : cheques){
model.addRow(new Object[]{cq.getChqNum(), cq.getName(),cq.getAmount(),cq.getDate()});
}
}
}
This is my second GUI class:
public class PrintChequeGUI extends JFrame {
private JPanel contentPane;
private JTextField txtAmount;
/**
* Create the frame.
* #throws SQLException
*/
public PrintChequeGUI() throws SQLException {
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 480, 400);
contentPane = new JPanel();
contentPane.setBackground(new Color(176, 224, 230));
contentPane.setForeground(SystemColor.inactiveCaption);
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel panel = new JPanel();
panel.setBounds(10, 11, 454, 84);
contentPane.add(panel);
JPanel panel_1 = new JPanel();
panel_1.setBackground(new Color(220, 220, 220));
panel_1.setBorder(new LineBorder(new Color(0, 0, 0), 1, true));
panel_1.setBounds(10, 106, 454, 198);
contentPane.add(panel_1);
panel_1.setLayout(null);
JLabel lblNewLabel_1 = new JLabel("Date:");
lblNewLabel_1.setBounds(327, 11, 40, 14);
panel_1.add(lblNewLabel_1);
JLabel lblDate = new JLabel();
lblDate.setBounds(368, 11, 69, 14);
panel_1.add(lblDate);
JLabel lblNewLabel_2 = new JLabel("Payee to the Order of");
lblNewLabel_2.setBounds(10, 50, 125, 14);
panel_1.add(lblNewLabel_2);
JLabel lblName = new JLabel();
lblName.setBounds(134, 50, 214, 14);
panel_1.add(lblName);
JLabel lblRs = new JLabel("Rs.");
lblRs.setBounds(351, 50, 24, 14);
panel_1.add(lblRs);
JLabel lblAmount = new JLabel();
lblAmount.setBounds(375, 50, 69, 14);
panel_1.add(lblAmount);
txtAmount = new JTextField();
txtAmount.setBounds(10, 83, 338, 20);
panel_1.add(txtAmount);
txtAmount.setColumns(10);
JLabel lblRupees = new JLabel("Rupees");
lblRupees.setBounds(351, 86, 46, 14);
panel_1.add(lblRupees);
JLabel lbl = new JLabel("Cheque Number:");
lbl.setBounds(10, 126, 100, 14);
panel_1.add(lbl);
JLabel lblChequeNum = new JLabel();
lblChequeNum.setBounds(115, 126, 46, 14);
panel_1.add(lblChequeNum);
JLabel lblSig = new JLabel("<<Sig>>");
lblSig.setBounds(321, 151, 90, 14);
panel_1.add(lblSig);
JLabel lblSigName = new JLabel("A.B.C.Test Name");
lblSigName.setBounds(311, 176, 100, 14);
panel_1.add(lblSigName);
JPanel panel_2 = new JPanel();
panel_2.setBackground(new Color(220, 220, 220));
panel_2.setBorder(new LineBorder(new Color(0, 0, 0), 1, true));
panel_2.setBounds(10, 315, 454, 40);
contentPane.add(panel_2);
panel_2.setLayout(null);
JButton btnPrint = new JButton("Print");
btnPrint.setBounds(102, 11, 89, 23);
panel_2.add(btnPrint);
JButton btnBack = new JButton("Back");
btnBack.setBounds(263, 11, 89, 23);
panel_2.add(btnBack);
ChequeGUI gui = new ChequeGUI();
lblChequeNum.setText(gui.chqNo);
lblAmount.setText(Double.toString(gui.chkAmount));
lblName.setText(gui.payName);
lblDate.setText(String.valueOf(gui.chkDate));
}
}

This can be solved in many ways:
1.
As I mentioned in my comment, Pass the current instance of ChequeGUI to the constructor of PrintChequeGUI and use that instance instead of creating new one in PrintChequeGUI
PrintChequeGUI pcg = new PrintChequeGUI(this);
and in PrintChequeGUI class
public PrintChequeGUI(ChequeGUI gui) throws SQLException {
(but i think its not a good approach)
2.
For Better option, Pass the selected instance of Cheque to PrintChequeGUI as constructor argument. For this you need to create a TableModel with instance of Cheque.
Sample is given below:
package com.test;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class ChequeGUI extends JFrame {
JTable guiTable = new JTable();
ChequeTableModel model;
public ChequeGUI() throws SQLException {
guiTable.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
// guiTable.getTableHeader().getDefaultRenderer();
int row = guiTable.getSelectedRow();
Cheque c = model.getChequeByRow(row);
try {
PrintChequeGUI pcg = new PrintChequeGUI(c);
pcg.setTitle("Print Cheque");
pcg.setVisible(true);
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
model = new ChequeTableModel();
guiTable.setModel(model);
add(new JScrollPane(guiTable));
model.loadData();
}
public class ChequeTableModel extends AbstractTableModel {
List<Cheque> dataModel;
String[] columns = { "Cheque Number", "Payee Name", "Cheque Amount",
"Cheque Date" };
public ChequeTableModel() {
super();
dataModel = new ArrayList<Cheque>();
}
#Override
public int getColumnCount() {
return columns.length;
}
#Override
public String getColumnName(int column) {
return columns[column];
}
#Override
public int getRowCount() {
return dataModel.size();
}
#Override
public Object getValueAt(int row, int column) {
Object value = null;
Cheque c = getChequeByRow(row);
switch (column) {
case 0:
value = c.chqNo;
break;
case 1:
value = c.payName;
break;
case 2:
value = c.chkAmount;
break;
case 3:
value = c.chkDate;
break;
default:
break;
}
return value;
}
public Cheque getChequeByRow(int row) {
if (dataModel.size() <= 0)
return null;
if (row < 0)
return null;
return dataModel.get(row);
}
public void loadData() {
/*
*
* //Uncomment this for database connection and load data from
* database; //Please note to disconnect database if not needed
*
*
* DBConnection connection = new DBConnection();
*
* // Populate Table ChequeDAOImpl chqdi = new ChequeDAOImpl();
* chqdi.setConnection(connection); List<Cheque> cheques =
* chqdi.getCheques();
*
* for (Cheque cq : cheques) { model.addRow(new Object[] {
* cq.getChqNum(), cq.getName(), cq.getAmount(), cq.getDate() }); }
*/
for (int i = 0; i < 10; i++) {
Cheque c = new Cheque();
c.chkAmount = i * 1000;
c.chqNo = String.valueOf(i);
c.chkDate = new Date(System.currentTimeMillis());
dataModel.add(c);
}
fireTableRowsInserted(0, dataModel.size());
}
}
public static void main(String[] args) throws SQLException {
ChequeGUI c = new ChequeGUI();
c.pack();
c.setVisible(true);
}
}
Second class
package com.test;
import java.awt.Color;
import java.awt.SystemColor;
import java.sql.SQLException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
public class PrintChequeGUI extends JFrame {
private JPanel contentPane;
private JTextField txtAmount;
/**
* Create the frame.
*
* #throws SQLException
*/
public PrintChequeGUI(Cheque cheque) throws SQLException {
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 480, 400);
contentPane = new JPanel();
contentPane.setBackground(new Color(176, 224, 230));
contentPane.setForeground(SystemColor.inactiveCaption);
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JPanel panel = new JPanel();
panel.setBounds(10, 11, 454, 84);
contentPane.add(panel);
JPanel panel_1 = new JPanel();
panel_1.setBackground(new Color(220, 220, 220));
panel_1.setBorder(new LineBorder(new Color(0, 0, 0), 1, true));
panel_1.setBounds(10, 106, 454, 198);
contentPane.add(panel_1);
panel_1.setLayout(null);
JLabel lblNewLabel_1 = new JLabel("Date:");
lblNewLabel_1.setBounds(327, 11, 40, 14);
panel_1.add(lblNewLabel_1);
JLabel lblDate = new JLabel();
lblDate.setBounds(368, 11, 69, 14);
panel_1.add(lblDate);
JLabel lblNewLabel_2 = new JLabel("Payee to the Order of");
lblNewLabel_2.setBounds(10, 50, 125, 14);
panel_1.add(lblNewLabel_2);
JLabel lblName = new JLabel();
lblName.setBounds(134, 50, 214, 14);
panel_1.add(lblName);
JLabel lblRs = new JLabel("Rs.");
lblRs.setBounds(351, 50, 24, 14);
panel_1.add(lblRs);
JLabel lblAmount = new JLabel();
lblAmount.setBounds(375, 50, 69, 14);
panel_1.add(lblAmount);
txtAmount = new JTextField();
txtAmount.setBounds(10, 83, 338, 20);
panel_1.add(txtAmount);
txtAmount.setColumns(10);
JLabel lblRupees = new JLabel("Rupees");
lblRupees.setBounds(351, 86, 46, 14);
panel_1.add(lblRupees);
JLabel lbl = new JLabel("Cheque Number:");
lbl.setBounds(10, 126, 100, 14);
panel_1.add(lbl);
JLabel lblChequeNum = new JLabel();
lblChequeNum.setBounds(115, 126, 46, 14);
panel_1.add(lblChequeNum);
JLabel lblSig = new JLabel("<<Sig>>");
lblSig.setBounds(321, 151, 90, 14);
panel_1.add(lblSig);
JLabel lblSigName = new JLabel("A.B.C.Test Name");
lblSigName.setBounds(311, 176, 100, 14);
panel_1.add(lblSigName);
JPanel panel_2 = new JPanel();
panel_2.setBackground(new Color(220, 220, 220));
panel_2.setBorder(new LineBorder(new Color(0, 0, 0), 1, true));
panel_2.setBounds(10, 315, 454, 40);
contentPane.add(panel_2);
panel_2.setLayout(null);
JButton btnPrint = new JButton("Print");
btnPrint.setBounds(102, 11, 89, 23);
panel_2.add(btnPrint);
JButton btnBack = new JButton("Back");
btnBack.setBounds(263, 11, 89, 23);
panel_2.add(btnBack);
// ChequeGUI gui = new ChequeGUI();
lblChequeNum.setText(cheque.chqNo);
lblAmount.setText(Double.toString(cheque.chkAmount));
lblName.setText(cheque.payName);
lblDate.setText(String.valueOf(cheque.chkDate));
}
}
The Cheque class you already used to get details from database

Opening a new window (JFrame) with e.getsource

I am having a problem with opening a new window. If I comment out the if(e.getsource() == btnAddBook) the action performed opens the window. As soon as I add the if statement in and try to open the window, nothing happens.
/* this is the code that adds the button and the action listner
JButton btnAddBook = new JButton("Add Book");
btnAddBook.setFont(new Font("Tahoma", Font.BOLD, 8));
btnAddBook.setBounds(10, 327, 86, 23);
btnAddBook.addActionListener(this);
getContentPane().add(btnAddBook);
*/
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if(source == btnAddBook){
ChildWindowAdd child = new ChildWindowAdd(this);
this.setVisible(true);
child.setVisible(true);
child.setSize(450,400);
child.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
}
}
class ChildWindowAdd extends JFrame implements ActionListener {
LibraryDatabase parent;
Container c;
JLabel lblTitle, lblaName, lblISBN, lblDate,lbl1,lbl5,lbl10;
JTextField txtTitle, txtaName, txtISBN, txtDate;
JButton btnSave;
JSlider sRating;
JCheckBox chkSci, chkFant, chkRomance, chkAction, chkThriller, chkHorror;
public ChildWindowAdd(LibraryDatabase parent){
this.parent = parent;
getContentPane().setLayout(null);
txtTitle = new JTextField();
txtTitle.setBounds(46, 29, 146, 20);
getContentPane().add(txtTitle);
txtTitle.setColumns(10);
JLabel lblTitle = new JLabel("Book Title");
lblTitle.setFont(new Font("Tahoma", Font.PLAIN, 14));
lblTitle.setBounds(36, 11, 72, 14);
getContentPane().add(lblTitle);
JLabel lblaName = new JLabel("Author Name");
lblaName.setFont(new Font("Tahoma", Font.PLAIN, 14));
lblaName.setBounds(36, 60, 89, 14);
getContentPane().add(lblaName);
txtaName = new JTextField();
txtaName.setBounds(46, 85, 146, 20);
getContentPane().add(txtaName);
txtaName.setColumns(10);
JLabel lblIsbnNumber = new JLabel("ISBN Number");
lblIsbnNumber.setFont(new Font("Tahoma", Font.PLAIN, 14));
lblIsbnNumber.setBounds(36, 116, 86, 14);
getContentPane().add(lblIsbnNumber);
txtISBN = new JTextField();
txtISBN .setBounds(46, 143, 146, 20);
getContentPane().add(txtISBN );
txtISBN .setColumns(10);
JLabel lblDate = new JLabel("Date Added yyyy/mm/dd");
lblDate.setFont(new Font("Tahoma", Font.PLAIN, 14));
lblDate.setBounds(36, 174, 177, 20);
getContentPane().add(lblDate);
txtDate = new JTextField();
txtDate.setBounds(46, 199, 146, 20);
getContentPane().add(txtDate);
txtDate.setColumns(10);
JPanel genreP = new JPanel();
genreP.setBounds(239, 29, 158, 194);
genreP.setBorder(new TitledBorder(null, "Genre's", TitledBorder.LEADING, TitledBorder.TOP, null, null));
getContentPane().add(genreP);
genreP.setLayout(null);
final JCheckBox chkSci = new JCheckBox("Sci - Fi");
chkSci.setBounds(23, 22, 97, 23);
genreP.add(chkSci);
final JCheckBox chkFant = new JCheckBox("Fantasy");
chkFant.setBounds(23, 48, 97, 23);
genreP.add(chkFant);
final JCheckBox chkRomance = new JCheckBox("Romance");
chkRomance.setBounds(23, 74, 97, 23);
genreP.add(chkRomance);
final JCheckBox chkAction = new JCheckBox("Action");
chkAction.setBounds(23, 100, 97, 23);
genreP.add(chkAction);
final JCheckBox chkThriller = new JCheckBox("Thriller");
chkThriller.setBounds(23, 126, 97, 23);
genreP.add(chkThriller);
final JCheckBox chkHorror = new JCheckBox("Horror");
chkHorror.setBounds(23, 152, 97, 23);
genreP.add(chkHorror);
final JSlider sRating = new JSlider();
sRating.setBounds(118, 280, 200, 26);
getContentPane().add(sRating);
JLabel lbl1 = new JLabel("1");
lbl1.setBounds(118, 257, 7, 14);
getContentPane().add(lbl1);
JLabel lbl10 = new JLabel("10");
lbl10.setBounds(301, 257, 17, 14);
getContentPane().add(lbl10);
JLabel lbl5 = new JLabel("5");
lbl5.setBounds(214, 257, 7, 14);
getContentPane().add(lbl5);
JButton btnSave = new JButton("Save Book");
btnSave.addActionListener(this);
btnSave.setBounds(164, 317, 110, 23);
getContentPane().add(btnSave);
JLabel lblRating = new JLabel("Rate the book");
lblRating.setFont(new Font("Tahoma", Font.PLAIN, 12));
lblRating.setBounds(118, 226, 95, 20);
getContentPane().add(lblRating);
btnSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
PrintWriter fileWriter = null;
try {
fileWriter = new PrintWriter(new BufferedWriter(new FileWriter("c:\\temp\\database.dat", true)));
} catch (IOException e) {
e.printStackTrace();
}
fileWriter.println( txtTitle.getText()+" , "+txtaName.getText()+" , "+txtISBN.getText()+" , "+txtDate.getText()+" , "+String.valueOf(chkSci.isSelected())+" , "+String.valueOf(chkFant.isSelected())+" , "+String.valueOf(chkRomance.isSelected())+" , "+String.valueOf(chkAction.isSelected())+" , "+String.valueOf(chkThriller.isSelected())+" , "+String.valueOf(chkHorror.isSelected())+" , "+sRating.getValue());
fileWriter.close();
}
});
}
#Override
public void actionPerformed(ActionEvent arg0) {
parent.setVisible(true);
this.dispose();
}
public void actionPerformed1(ActionEvent e) {
// TODO Auto-generated method stub
}
}

Check on the basis of button text
((JButton)source).getText().equals("Add Book")
here is complete code
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source instanceof JButton && ((JButton) source).getText().equals("Add Book")) {
...
}
}

This worked for me. I had to match the String as the e.getsource was not working.
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
String test = ((JButton)source).getText();
if(test == "Add Book"){
ChildWindowAdd child = new ChildWindowAdd(this);
this.setVisible(true);
child.setVisible(true);
child.setSize(450,400);
child.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}

Could not find or load main class, Swing

I am having a problem with my Java GUI application. It for some reason says that it cannot find or load the main class. I have checked all the brackets and don't see a problem. I had originally copied this over from another file as I wanted to start over with some things, maybe that is the problem. Here is the code:
public class GradeAverage extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
JTextField textField;
int numAverage = 0;
double average;
Container c;
JLabel gradelbl;
class AnswerHandler implements ActionListener {
public void actionPerformed(ActionEvent e) {
numAverage++;
gradelbl.setText("" + numAverage);
}
}
public GradeAverage() {
super("Final Grades");
c = getContentPane();
JLabel lblNewLabel = new JLabel("Grade: ");
lblNewLabel.setFont(new Font("Times New Roman", Font.BOLD, 14));
lblNewLabel.setBounds(30, 50, 46, 14);
textField = new JTextField();
textField.setBounds(81, 47, 86, 20);
textField.setColumns(10);
JLabel gradeLbl = new JLabel("0");
gradeLbl.setFont(new Font("Times New Roman", Font.BOLD, 14));
gradeLbl.setBounds(91, 92, 15, 14);
JLabel gradeTextLbl = new JLabel("Grades Recorded");
gradeTextLbl.setFont(new Font("Times New Roman", Font.BOLD, 14));
gradeTextLbl.setBounds(106, 92, 123, 14);
JButton recordBtn = new JButton("Record");
AnswerHandler ah = new AnswerHandler();
recordBtn.addActionListener(ah);
recordBtn.setBounds(177, 47, 86, 20);
JButton displayAverageBtn = new JButton("New button");
displayAverageBtn.setBounds(30, 117, 233, 23);
JPanel finalGradePanel = new JPanel();
finalGradePanel.setBorder(new TitledBorder(null, "Enter Your Final Grades", TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 128)));
finalGradePanel.setBounds(10, 21, 264, 131);
JPanel avgGradePanel = new JPanel();
avgGradePanel.setFont(new Font("Times New Roman", Font.BOLD, 16));
avgGradePanel.setBounds(10, 178, 264, 61);
avgGradePanel.setBorder(new TitledBorder(null, "Average Grade", TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 128)));
c.add(avgGradePanel);c.add(finalGradePanel);c.add(displayAverageBtn);c.add(recordBtn);c.add(gradeTextLbl);c.add(gradeLbl);
}
public static void main(String[] args) {
GradeAverage app = new GradeAverage();
app.setSize(300, 300);
app.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
app.setVisible(true);
}
}