DefaulTableModel row headers

hi All,
URGENT REQUIREMENT PLEASE HELP ME
I have a table of type DefaultTableModel .The table has rowheaders and columnheaders which are dynamically generated from the DB.
On action i want to add/remove a rowheader which should be update the rowheaders in the UI without affecting the table.
Thanks in advance
FullofJAva

I have a JTable of DefaultTableModel and this table is having rowheaders and columnheaders and they will be created dynamically using the data from DB and i have a checkbox and on selection of the checkbox iam deleting 2rows from the table but i am not able to remove the rowheaders??? So in this regard i need some help

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Add JTable Row Headers At The End Of The Rows(At Right)?

hi all
i got this example for adding JTable Row Headers,but it adds the headers at the left(beginning of the row)
and i want to add the headers at the end of the row(at right),any ideas how to do that?
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.AbstractListModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
* @version 1.0 11/09/98
class RowHeaderRenderer extends JLabel implements ListCellRenderer {
RowHeaderRenderer(JTable table) {
    JTableHeader header = table.getTableHeader();
    setOpaque(true);
    setBorder(UIManager.getBorder("TableHeader.cellBorder"));
    setHorizontalAlignment(CENTER);
    setForeground(header.getForeground());
    setBackground(header.getBackground());
    setFont(header.getFont());
public Component getListCellRendererComponent(JList list, Object value,
      int index, boolean isSelected, boolean cellHasFocus) {
    setText((value == null) ? "" : value.toString());
    return this;
class RowHeaderExample extends JFrame {
public RowHeaderExample() {
    super("Row Header Example");
    setSize(370, 150);
    ListModel lm = new AbstractListModel() {
      String headers[] = { "Row1", "Row2", "Row3", "Row4"};
      public int getSize() {
        return headers.length;
      public Object getElementAt(int index) {
        return headers[index];
    DefaultTableModel dm = new DefaultTableModel(lm.getSize(), 4);
    JTable table = new JTable(dm);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    table.setRowHeight(18);
    JList rowHeader = new JList(lm);
    rowHeader.setFixedCellWidth(50);
    rowHeader.setFixedCellHeight(18);
    rowHeader.setCellRenderer(new RowHeaderRenderer(table));
    JScrollPane scroll = new JScrollPane(table);
    scroll.setRowHeaderView(rowHeader);
    getContentPane().add(scroll, BorderLayout.CENTER);
public static void main(String[] args) {
    RowHeaderExample frame = new RowHeaderExample();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
    frame.setVisible(true);
}

fixed by:
list.setBackground(table.getTableHeader().getBackground());here's the full code:
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.ComponentOrientation;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListCellRenderer;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
* @version 1.0 11/09/98
class RowHeaderRenderer extends JLabel implements ListCellRenderer {
JTable table;
RowHeaderRenderer(JTable table) {
    this.table = table;
    JTableHeader header = table.getTableHeader();
    setOpaque(true);
    setBorder(UIManager.getBorder("TableHeader.cellBorder"));
    setHorizontalAlignment(CENTER);
    setForeground(header.getForeground());
    setBackground(header.getBackground());
    setFont(header.getFont());
public Component getListCellRendererComponent(JList list, Object value,
      int index, boolean isSelected, boolean cellHasFocus) {
    list.setBackground(table.getTableHeader().getBackground());
    setText((value == null) ? "" : value.toString());
    return this;
class RowHeaderExample extends JFrame {
public RowHeaderExample() {
    super("Row Header Example");
    setSize(370, 150);
    setLocationRelativeTo(null);
    DefaultListModel lstModel = new DefaultListModel();
    lstModel.addElement("Row 1");
    lstModel.addElement("Row 2");
    lstModel.addElement("Row 3");
    lstModel.addElement("Row 4");
    DefaultTableModel dm = new DefaultTableModel(lstModel.getSize(), 4);
    JTable table = new JTable(dm);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    table.setRowHeight(18);
    JList rowHeader = new JList(lstModel);
    rowHeader.setFixedCellWidth(50);
    rowHeader.setFixedCellHeight(18);
    rowHeader.setCellRenderer(new RowHeaderRenderer(table));
    JScrollPane scroll = new JScrollPane(table);
    scroll.setRowHeaderView(rowHeader);
    table.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
    scroll.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
    getContentPane().add(scroll, BorderLayout.CENTER);
public static void main(String[] args) {
    RowHeaderExample frame = new RowHeaderExample();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
    frame.setVisible(true);
}

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Message Edited by Eugen Graf on 09-25-2008 04:52 AM
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Button.png ‏7 KB

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