Again with the JTable having a Radio Button

Question

I have an issue with a project I am working on. The client "insists" on having radio buttons in a JTable. Without going into all the philosophical discussions about this, I need an answer as to how I can make my radio buttons behave like radio buttons (i.e. be in a button group and select/deselect appropriately).
I have a working code sample for the application as well as the renderer and editor I have. Can someone help me?
Thanks in advance!
The Main application
* Main.java
* Created on July 12, 2006, 12:31 PM
package sampletest;
import java.awt.Dimension;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
public class Main extends JFrame {
    private JTable table = null;
    /** Creates a new instance of Main */
    public Main() {
        super();
        this.setPreferredSize(new Dimension(400,400));
        JPanel p = new JPanel();
        createTable();
        p.add(table);
        this.add(p);
        pack();
        this.setVisible(true);
    private void createTable() {
        table = new JTable();
        DefaultTableModel model = (DefaultTableModel)table.getModel();
        model.setColumnCount(3);
        model.setRowCount(3);
        TableColumn column = table.getColumnModel().getColumn(0);
        column.setCellRenderer(new RadioButtonRenderer());
        column.setCellEditor(new RadioButtonEditor(new JCheckBox()));        
        for(int row=0; row<3; row++) {
            for(int col=0; col<3; col++) {
                model.setValueAt(new Boolean(false), row, col);
     * @param args the command line arguments
    public static void main(String[] args) {
        Main main = new Main();
}The renderer
* RadioButtonRenderer.java
* Created on July 12, 2006, 12:38 PM
package sampletest;
import java.awt.Component;
import javax.swing.JRadioButton;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
class RadioButtonRenderer implements TableCellRenderer {
    public JRadioButton btn = new JRadioButton();
    public Component getTableCellRendererComponent(JTable table, Object
        value,boolean isSelected, boolean hasFocus, int row, int column) {
        if (value==null)
            return null;
        if(((Boolean)value).booleanValue())
            btn.setSelected(true);
        else
            btn.setSelected(false);
        if (isSelected) {
            btn.setForeground(table.getSelectionForeground());
            btn.setBackground(table.getSelectionBackground());
        } else {
            btn.setForeground(table.getForeground());
            btn.setBackground(table.getBackground());
        return btn;
}The editor
package sampletest;
* RadioButtonEditor.java
* Created on July 12, 2006, 12:31 PM
import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.ButtonGroup;
import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JRadioButton;
import javax.swing.JTable;
public class RadioButtonEditor extends DefaultCellEditor implements ItemListener {
    public JRadioButton btn = new JRadioButton();
    public RadioButtonEditor(JCheckBox checkBox) {
        super(checkBox);
    public Component getTableCellEditorComponent(JTable table, Object
        value, boolean isSelected, int row, int column) {
        if (value==null) return null;
            btn.addItemListener(this);
        if ( ( (Boolean) value).booleanValue())
            btn.setSelected(true);
        else
            btn.setSelected(false);
        return btn;
    public Object getCellEditorValue() {
        if(btn.isSelected() == true)
            return new Boolean(true);
        else
            return new Boolean(false);
    public void itemStateChanged(ItemEvent e) {
        super.fireEditingStopped();
}

Answer 1

     public class MyTableModel extends DefaultTableModel{
          public void setValueAt(Object aValue,
                int row,
                int column){
               if (column == 0){
                    if (aValue instanceof Boolean){
                         boolean val = ((Boolean)aValue).booleanValue();
                         super.setValueAt(aValue, row, column);
                         if (val){
                              for (int i=0; i<getRowCount(); i++){
                                   if (i != row){
                                        super.setValueAt(false, i, column);
               else{
                    super.setValueAt(aValue, row, column);
     }