Adiing row header to J Table

Question

i want to add my row header dynamically when i am add a row by pressing the add button it is possible..
and thr problem iam facing in this program is that the row header is there but along with row header a label like shade visible upto the end of frame.
Any help over these
And this is my code
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
]import javax.swing.table.*;
public class RowHeaderExample extends JFrame {JTable table;  
public RowHeaderExample()
{        super( "Row Header Example" );    
   setSize( 300, 150 );    
   ListModel listModel = new AbstractListModel() {   
        String headers[] = {"","","","","","" };        
   public int getSize() { return headers.length; }    
       public Object getElementAt(int index) { return headers[index];
     DefaultTableModel defaultModel =            new DefaultTableModel(listModel.getSize(),10);  
      table = new JTable( defaultModel );   
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);    
   // Create single component to add to scrollpane  
final JList rowHeader = new JList(listModel);    
   rowHeader.setFixedCellWidth(40);    
   rowHeader.setFixedCellHeight(table.getRowHeight());      
rowHeader.setCellRenderer(new RowHeaderRenderer(table));   
    JScrollPane scroll = new JScrollPane( table ); 
      scroll.setRowHeaderView(rowHeader);
// Adds row-list left of the table      
getContentPane().add(scroll, BorderLayout.CENTER);   
   rowHeader.addMouseListener(new MouseAdapter() {     
     public void mouseClicked(MouseEvent e) {     
     System.out.println("click Here 1");          
int index = rowHeader.locationToIndex(e.getPoint());
table.setRowSelectionInterval(index,index);          
table.requestFocus();     
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); 

Answer 1

actually i dont quite understand your problem, dont know whether this one solve your problem, i guess may be the problem come from your renderer
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class RowHeaderExample
    extends JFrame {
  JTable table;
  public RowHeaderExample() {
    super("Row Header Example");
    setSize(300, 150);
    ListModel listModel = new AbstractListModel() {
      String headers[] = {
          "Row 1", "Row 2", "Row 3", "Row 4", "Row 5", "Row 6"};
      public int getSize() {
        return headers.length;
      public Object getElementAt(int index) {
        return headers[index];
    DefaultTableModel defaultModel = new DefaultTableModel(listModel.getSize(),
        10);
    table = new JTable(defaultModel);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    // Create single component to add to scrollpane
    final JList rowHeader = new JList(listModel);
    rowHeader.setFixedCellWidth(40);
    rowHeader.setFixedCellHeight(table.getRowHeight());
    rowHeader.setCellRenderer(new RowHeaderRenderer(table));
    JScrollPane scroll = new JScrollPane(table);
    scroll.setRowHeaderView(rowHeader);
    // Adds row-list left of the table
    getContentPane().add(scroll, BorderLayout.CENTER);
    rowHeader.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        System.out.println("click Here 1");
        int index = rowHeader.locationToIndex(e.getPoint());
        table.setRowSelectionInterval(index, index);
        table.requestFocus();
  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);
  class RowHeaderRenderer extends JButton implements ListCellRenderer{
    JTable table;
    public RowHeaderRenderer(JTable table){
      this.table = table;
      setFont(new Font("Dialog",0,11));
      setMargin(new Insets(0,0,0,0));
    public Component getListCellRendererComponent(JList list, Object value,int index, boolean isSelected, boolean hasFocus){
      list.setBackground(getBackground());
      this.setText(value.toString());
      return this;
    public Component getListCellRendererComponent(JList list, Object value, boolean isSelected, boolean hasFocus){
      list.setBackground(getBackground());
      this.setText(value.toString());
      return this;
}