A communication problem (sort of) between classes

Question

Hi,
Why, oh why, doesn't this work:
When I select a row in my tableClass (consist of a JTable) I want to display these values (strings) in my TextFieldGUI class (consist of just JTextFields). My code looks like this:
TableClass:
public void mouseClicked(java.awt.event.MouseEvent mouseEvent) {
    textFieldGUI = new TextFieldGUI() ;//reference to my textfield class
    gui = new mainGUI() ; //reference to my GUI class
    int tabbedIndex = gui.getSelectedIndex() ;
    int col = tableModel.getColumnCount() ;
    Vector string = new Vector() ;
    String empty = "" ;       
    for(int index = 0; index < col ; index++){
        if(table.getValueAt(row, index) == null)
            string.addElement(empty) ;
        else
            string.addElement(table.getValueAt(row, index).toString()) ;
    if(tabbedIndex == 0){
        System.out.println(string) ; //works fine
        textFieldGUI.setTextFieldValues(string) ;
}TextField class:
public void setTextFieldValues(Vector s){
    Vector string = new Vector() ;
    string = s ;
    System.out.println("TextFieldVector: " + string) ; //works fine as well
    String name = "" ;
    String dob = "" ;
    String web = "" ;
    name = string.elementAt(0).toString() ;
    dob = string.elementAt(1).toString() ;
    web = string.elementAt(2).toString() ;      
    System.out.println("NAME: " + name +
                       ", BIRTH: " + dob +
                       ", WEB: " + web) ; //values are correctly printed
    txtName.setText(name) ; //writes nothing (empty)
    txtDob.setText(dob) ; //writes nothing (empty)
    txtWeb.setText(web) ; //writes nothing (empty)
}Anyone got a hint on how I should svolve this one?
thanks
gmtongar

Answer 1

Hi,
It's a bit difficult for me to provide you a fully working program, this program consist for the moment of six classes. But I'll post the table class and the TextFieldGUI class, I'm also using a tableModel, which I guess you know.
tableClass:
public class TableClass extends JPanel implements MouseListener{
    private TextFieldGUI textFieldGUI ;
    private mainGUI gui ;
    private SQLCon sqlCon ;
    private JTable table ;
    private ResultSetTableModel tableModel ;       
    private int row ;
    private JTextField n, d, w ;
    private Vector string ;
    private String empty ;
    public TableClass(){
        createSQLConnection() ;
        createTableGUI() ;
    public void createSQLConnection(){
        sqlCon = new SQLCon() ;      
        sqlCon.sqlSelectMaxBandID() ;
        sqlCon.runCheckBand() ;       
    public void createTableGUI(){
        JPanel panCenter = new JPanel() ;
        String meta = sqlCon.sqlDefaultBandValue() ;       
        try{
            tableModel = new ResultSetTableModel(meta) ;
            table = new JTable(tableModel) ;          
            table.setPreferredScrollableViewportSize(new Dimension(875,250)) ;
            table.addMouseListener(this) ;
            table.getSelectionModel().addListSelectionListener(
                new ListSelectionListener(){
                    public void valueChanged(ListSelectionEvent event){
                        if (event.getValueIsAdjusting())
                            return ;
                        row = table.getSelectedRow() ;                       
         catch(SQLException sqle){
            JOptionPane.showMessageDialog(null, sqle.getMessage(),
            "Feilmelding", JOptionPane.ERROR_MESSAGE) ;
        catch(ClassNotFoundException cnfe){
            JOptionPane.showMessageDialog(null, cnfe.getMessage(),
            "Feilmelding", JOptionPane.ERROR_MESSAGE) ;
        int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED ;
        int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED ;
        JScrollPane scrollPane = new JScrollPane(table, v, h) ;       
        panCenter.add(scrollPane) ;
        panCenter.setBorder(new MatteBorder(6,6,6,6, Color.gray)) ;
        panCenter.setBackground(Color.lightGray) ;
        add(panCenter) ;
    public void mouseClicked(java.awt.event.MouseEvent mouseEvent) {
        textFieldGUI = new TextFieldGUI() ;             
        gui = new mainGUI() ;
        int tabbedIndex = gui.getSelectedIndex() ;
        int col = tableModel.getColumnCount() ;
        string = new Vector() ;
        empty = new String() ;
        for(int index = 0; index < col ; index++){
            if(table.getValueAt(row, index) == null)
                string.addElement(empty) ;
            else
                string.addElement(table.getValueAt(row, index).toString()) ;
        if(tabbedIndex == 0){       
          textFieldGUI.setTextFieldValues(string) ;
} TextFieldGUI-class
public class TextFieldGUI extends JPanel implements ActionListener{
    private SQLCon sqlCon  ;
    private JPanel panSouth01 ;
    private JPanel panSouth02 ;
    private JPanel panSouth03 ;
    private JPanel panSouth04 ;
    private JPanel panSouth05 ;
    public JTextField txtName ;
    public JTextField txtDob ;
    public JTextField txtWeb ;
    private JButton order ;
    private DefaultComboBoxModel countryModel ;
    private JComboBox countryComboBox ;
    private String strCountry ;   
    private String name  ;
    private String dob  ;
    private String web ;
    public TextFieldGUI(){
        createSQLConnection() ;
        createTextFieldGUI() ;
        fillComboCountry() ;
    public void createSQLConnection(){
        sqlCon = new SQLCon() ;        
    public void createTextFieldGUI(){
        JPanel panText = new JPanel() ;
        panText.setBorder(new MatteBorder(6,6,6,6, Color.gray)) ;      
        panText.setBackground(Color.lightGray) ;        
        panSouth01 = new JPanel() ;
        panSouth01.setLayout(new GridLayout(2,1,5,5)) ;
        panSouth01.setBackground(Color.lightGray) ;
        JLabel lblName = new JLabel("Name") ;
        txtName = new JTextField(30) ;
        txtName.setFont(
            new Font("Serif", Font.BOLD, 14)) ;
        txtName.addActionListener(this) ;
        panSouth01.add(lblName) ;
        panSouth01.add(txtName) ;
        panText.add(panSouth01) ;
        panSouth02 = new JPanel() ;
        panSouth02.setBackground(Color.lightGray) ;
        panSouth02.setLayout(new GridLayout(2,1,5,5)) ;         
        JLabel lblDOB = new JLabel("DOB(DD-MM-YYYY)") ;
        txtDob = new JTextField(10) ;
        txtDob.setFont(
            new Font("Serif", Font.BOLD, 14)) ;
        txtDob.addActionListener(this) ;
        panSouth02.add(lblDOB) ;
        panSouth02.add(txtDob) ;
        panText.add(panSouth02) ;
        panSouth03 = new JPanel() ;
        panSouth03.setBackground(Color.lightGray) ;
        panSouth03.setLayout(new GridLayout(2,1,5,5)) ;
        JLabel lblWeb = new JLabel(" WEB-site") ;
        txtWeb = new JTextField(22) ;
        txtWeb.setFont(
            new Font("Serif", Font.BOLD, 14)) ;
        txtWeb.addActionListener(this) ;
        panSouth03.add(lblWeb) ;
        panSouth03.add(txtWeb) ;
        panText.add(panSouth03) ;
        panSouth04 = new JPanel() ;
        panSouth04.setBackground(Color.lightGray) ;
        panSouth04.setLayout(new GridLayout(2,1,5,5)) ;
        JLabel lblCountry = new JLabel("Country") ;
        countryModel = new DefaultComboBoxModel() ;
        countryComboBox = new JComboBox(countryModel) ;
        countryComboBox.setMaximumRowCount(5) ;
        countryComboBox.addActionListener(this) ;
        panSouth04.add(lblCountry) ;
        panSouth04.add(countryComboBox) ;
        panText.add(panSouth04) ;
        add(panText) ;
    public void fillComboCountry(){
        Vector countryVektor = new Vector() ;
        countryVektor.removeAllElements() ;
        countryVektor = sqlCon.sqlCountry() ;
        countryModel.removeAllElements() ;
        try{           
            for (int index = 0; index < countryVektor.size (); index++)
                countryModel.addElement(countryVektor.get (index));       
        catch(NullPointerException npe){
    public String getName(){
        if(txtName.getText() == "")
            return null ;
        else
            return txtName.getText().toUpperCase() ;
    public String getDob(){
        if(txtDob.getText() == "")
            return null ;
        else
            return txtDob.getText() ;
    public String getWeb(){
        if(txtWeb.getText() == "")
            return null ;
        else
            return txtWeb.getText() ;
    public String getCountry(){
        if(strCountry == "")
            return null ;
        else
            return strCountry ;
    public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
    //This is where the action is... or the lack of it...
    public void setTextFieldValues(Vector s){
        Vector string = new Vector() ;
        string = s ;
        System.out.println("TextFieldVector: " + string) ;
        name = string.elementAt(0).toString() ;       
        dob = string.elementAt(1).toString() ;       
        web = string.elementAt(2).toString() ;
        System.out.println("NAME: " + name +
                           ", BIRTH: " + dob +
                           ", WEB: " + web) ;
        txtName.setText(name) ;
        txtDob.setText(dob) ;       
        txtWeb.setText(web) ;
        txtName.repaint() ;
        txtDob.repaint() ;
        txtWeb.repaint() ;
}I hope this helps in helping me... And thanks so far
As you can see I'm using the ListSelectionListener as well. Perhaps in a slightly different way, if you have a better suggestion, please let me know.
gmtongar