How do I add a JCheckBox to a JTable - URGENT HELP NEEDED

Question

Hello All,
This is kicking my butt. I need to create a JTable that I can dynamically add and delete rows of data to and this table must contain a JCheckBox which I can read the value of. I've been able to find examples out there that provides the ability to have a JCheckBox in the JTable, but do not also provide the function to add / delete rows from the JTable. I need to have both funtions in my table. Can somebody out there please help me with this?
Here's a simple example that I'm working with as a test to figure this out. This example has the functionality to add rows of data.
Thanks in advance.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
     JButton btnAdd;
     BorderLayout layout;
     DefaultTableModel model;
     public static void main(String[] args)
          TableTest app = new TableTest();
          app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TableTest()
          super("Table Example");
          layout = new BorderLayout();
          Container container = getContentPane();
          container.setLayout(layout);
          btnAdd = new JButton("Add");
          btnAdd.addActionListener(this);
          model = new DefaultTableModel();
          JTable table = new JTable(model);
          // Create a couple of columns
          model.addColumn("Col1");
          model.addColumn("Col2");
          // Append a row
          model.addRow(new Object[] { "v1", "v2" });
          model.addRow(new Object[] { "v3", "v4" });
          JScrollPane scrollPane = new JScrollPane(table);
          container.add(btnAdd, BorderLayout.NORTH);
          container.add(scrollPane,BorderLayout.CENTER);
          setSize(300, 200);
          setVisible(true);
     public void actionPerformed(ActionEvent e)
          if (e.getSource() == btnAdd)
               model.addRow(new Object[]{"Test", new Boolean(true)});
}

Answer 1

I got it, I added the public Class getColumnClass to new DefaultTableModel(). Here it is for your viewing pleasure.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
     JButton btnAdd;
     BorderLayout layout;
     DefaultTableModel model;
     JTable table;
     public static void main(String[] args)
          TableTest app = new TableTest();
          app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TableTest()
          super("Table Example");
          layout = new BorderLayout();
          Container container = getContentPane();
          container.setLayout(layout);
          btnAdd = new JButton("Add");
          btnAdd.addActionListener(this);
          model = new DefaultTableModel()
               public Class getColumnClass(int col)
                    switch (col)
                         case 1 :
                              return Boolean.class;
                         default :
                              return Object.class;
          table = new JTable(model);
          // Create a couple of columns
          model.addColumn("Col1");
          model.addColumn("Col2");
          // Append a row
          model.addRow(new Object[] { "v1", new Boolean(false)});
          model.addRow(new Object[] { "v3", new Boolean(false)});
          JScrollPane scrollPane = new JScrollPane(table);
          container.add(btnAdd, BorderLayout.NORTH);
          container.add(scrollPane, BorderLayout.CENTER);
          setSize(300, 200);
          setVisible(true);
     public void actionPerformed(ActionEvent e)
          if (e.getSource() == btnAdd)
               model.addRow(new Object[] { "Karl", new Boolean(true)});