JTable can't display column names and scroll bar in JDialog !!

Question

Dear All ,
My flow of program is JFrame call JDialog.
dialogCopy = new dialogCopyBay(frame, "Bay Name Define", true, Integer.parseInt(txtSourceBay.getText()) ,proVsl ,300 ,300);
dialogCopy.setBounds(0, 0, 300, 300);
dialogCopy.setVisible(true);        Then,I set the datasource of JTable is from a TableModel.
It's wild that JTable can diplay the data without column names and scroll bar.
I have no idea what's going wrong.Cause I follow the Sun Tutorial to code.
Here with the code of my JDialog.
Thanks & Best Regards
package com.whl.panel;
import com.whl.vslEditor.vslDefine;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Frame;
import javax.swing.JDialog;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
public class dialogCopyBay extends JDialog {
    vslDefine glbVslDefine;
    int lvCnt = -1;
    JTable tableCopyBay;
    int bgnX = 0;
    int bgnY = 30;
    int tableWidth = 100;
    int tableHeight = 100;
    public dialogCopyBay(Frame frame, String title, boolean modal, int sourceBay,
            vslDefine pVslDefine, int ttlWidth, int ttlHeight) {
        super(frame, title, true);
        Container contentPane = getContentPane();
        System.out.println("dialogCopyBay Constructor");
        glbVslDefine = null;
        glbVslDefine = pVslDefine;
        copyBayModel copyBay = new copyBayModel((glbVslDefine.getVslBayStructure().length - 1),sourceBay);
        tableCopyBay = new JTable(copyBay);
        tableCopyBay.setPreferredScrollableViewportSize(new Dimension(tableWidth, tableHeight));
        JScrollPane scrollPane = new JScrollPane(tableCopyBay);
        scrollPane.setViewportView(tableCopyBay) ;
        tableCopyBay.setFillsViewportHeight(true);
        tableCopyBay.setBounds(bgnX, bgnY, tableWidth, tableHeight);
        tableCopyBay.setBounds(10, 10, 100, 200) ;
        contentPane.setLayout(null);
        contentPane.add(scrollPane);
        contentPane.add(tableCopyBay);
    class copyBayModel extends AbstractTableModel {
        String[] columnNames;
        Object[][] dataTarget;
        public copyBayModel(int rowNum ,int pSourceBay) {
            columnNames = new String[]{"Choose", "Bay Name"};
            dataTarget = new Object[rowNum][2];
            for (int i = 0; i <= glbVslDefine.getVslBayStructure().length - 1; i++) {
                if (pSourceBay != glbVslDefine.getVslBayStructure().getBayName() &&
glbVslDefine.getVslBayStructure()[i].getIsSuperStructure() == 'N') {
lvCnt = lvCnt + 1;
dataTarget[lvCnt][0] = false;
dataTarget[lvCnt][1] = glbVslDefine.getVslBayStructure()[i].getBayName();
System.out.println("lvCnt=" + lvCnt + ",BayName=" + glbVslDefine.getVslBayStructure()[i].getBayName());
public int getRowCount() {
return dataTarget.length;
public int getColumnCount() {
return columnNames.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int rowIndex, int columnIndex) {
return dataTarget[rowIndex][columnIndex];
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
public boolean isCellEditable(int row, int col) {
if (col == 1) {
// Bay Name Not Allow To modify
return false;
} else {
return true;
public void setValueAt(Object value, int row, int col) {
dataTarget[row][col] = value;
fireTableCellUpdated(row, col);

Answer 1

Dear DB ,
I am not sure what you mean.
Currently,I don't undestand which code is error.
And I also saw some example is add JTable and JScrollPane in JDialog.
Like Below examle in Sun tutorial
public class ListDialog extends JDialog implements MouseListener, MouseMotionListener{
    private static ListDialog dialog;
    private static String value = "";
    private JList list;
    public static void initialize(Component comp,
            String[] possibleValues,
            String title,
            String labelText) {
        Frame frame = JOptionPane.getFrameForComponent(comp);
        dialog = new ListDialog(frame, possibleValues,
                title, labelText);
     * Show the initialized dialog. The first argument should
     * be null if you want the dialog to come up in the center
     * of the screen. Otherwise, the argument should be the
     * component on top of which the dialog should appear.
    public static String showDialog(Component comp, String initialValue) {
        if (dialog != null) {
            dialog.setValue(initialValue);
            dialog.setLocationRelativeTo(comp);
            dialog.setVisible(true);
        } else {
            System.err.println("ListDialog requires you to call initialize " + "before calling showDialog.");
        return value;
    private void setValue(String newValue) {
        value = newValue;
        list.setSelectedValue(value, true);
    private ListDialog(Frame frame, Object[] data, String title,
            String labelText) {
        super(frame, title, true);
//buttons
        JButton cancelButton = new JButton("Cancel");
        final JButton setButton = new JButton("Set");
        cancelButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                ListDialog.dialog.setVisible(false);
        setButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                ListDialog.value = (String) (list.getSelectedValue());
                ListDialog.dialog.setVisible(false);
        getRootPane().setDefaultButton(setButton);
//main part of the dialog
        list = new JList(data);
        list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        list.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                if (e.getClickCount() == 2) {
                    setButton.doClick();
        JScrollPane listScroller = new JScrollPane(list);
        listScroller.setPreferredSize(new Dimension(250, 80));
//XXX: Must do the following, too, or else the scroller thinks
//XXX: it's taller than it is:
        listScroller.setMinimumSize(new Dimension(250, 80));
        listScroller.setAlignmentX(LEFT_ALIGNMENT);
//Create a container so that we can add a title around
//the scroll pane. Can't add a title directly to the
//scroll pane because its background would be white.
//Lay out the label and scroll pane from top to button.
        JPanel listPane = new JPanel();
        listPane.setLayout(new BoxLayout(listPane, BoxLayout.Y_AXIS));
        JLabel label = new JLabel(labelText);
        label.setLabelFor(list);
        listPane.add(label);
        listPane.add(Box.createRigidArea(new Dimension(0, 5)));
        listPane.add(listScroller);
        listPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
//Lay out the buttons from left to right.
        JPanel buttonPane = new JPanel();
        buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.X_AXIS));
        buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
        buttonPane.add(Box.createHorizontalGlue());
        buttonPane.add(cancelButton);
        buttonPane.add(Box.createRigidArea(new Dimension(10, 0)));
        buttonPane.add(setButton);
//Put everything together, using the content pane's BorderLayout.
        Container contentPane = getContentPane();
        contentPane.add(listPane, BorderLayout.CENTER);
        contentPane.add(buttonPane, BorderLayout.SOUTH);
        pack();
    public void mouseClicked(MouseEvent e) {
        System.out.println("Mouse Click");
    public void mousePressed(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    public void mouseReleased(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    public void mouseEntered(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    public void mouseExited(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    public void mouseDragged(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
    public void mouseMoved(MouseEvent e) {
        throw new UnsupportedOperationException("Not supported yet.");
     * This is here so that you can view ListDialog even if you
     * haven't written the code to include it in a program.
}