How make a jCheckBox editable in a table with personal TableModel?

Question

Hi, first of all sorry about my English, ;)
I made my own Table Model with this simple characteristics:
- All rows isn't editables.
- Backgound colors changed.
- Get a Object[][] and Strin[] in his constructor.
- Accept booleans type and put in the cell a checkBox, checked or unchecked.
Well, most easy to explind, here's the code.
* elperlaTableModel.java
* Created on 12 de febrero de 2007, 18:24
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package elperla;
import GUI.elperla.*;
import javax.swing.*;
import java.sql.*;
import java.awt.Color;
import java.util.Vector;
import javax.swing.JTable;
import javax.swing.event.*;
import javax.swing.table.*;
public class elperlaTableModel
extends      AbstractTableModel
implements   ListSelectionListener
    public int nCols;
    public int nRows;
    public int editableColumn;
    public Object [] tittles;
    public Object [][] tabledata;
    public JViewport viewport;
    public JTable table;
    public elperlaTableModel(Object [][] tabledata, Object [] tittles) throws Exception{
        super();
        nCols           = tittles.length;
        nRows           = tabledata.length;
        editableColumn  = -1;
        this.tittles    = tittles;
        this.tabledata  = tabledata;
        /*Inicialitzaci� de objectes GUI*/
        ListSelectionModel  listSM      = null;
        viewport                        = new JViewport();
        TableSorter sorter              = new TableSorter(this);
        table                           = new JTable(sorter);
        sorter.setTableHeader(table.getTableHeader());
        listSM                          = table.getSelectionModel();
        viewport.add(table);
        /*Canviem l'aparen�a de la taula*/
        table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        Color colorBack = new Color(255, 255, 255);
        Color colorSelBack = new Color(255,153,51);
        table.setBackground(colorBack);
        table.setSelectionBackground(colorSelBack);
        listSM.addListSelectionListener(this);
    public int getRowCount(){
        return nRows;
    public int getColumnCount(){
        return nCols;
    public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    public String getColumnName(int column){
        String name = tittles[column].toString();
        if (name == null) return null;
        else return name.toString();
    public boolean isCellEditable(int row, int col){
        if (col == this.editableColumn)
            return true;
        else
            return false;
    public void setEditableColumn(int c){
        this.editableColumn = c;
    public void setTittles(String [] tittles){
        this.tittles = tittles;
    public void setData(Object [][] tabledata){
        this.tabledata = tabledata;
    public void setViewport(JViewport viewport){
        this.viewport = viewport;
    public Object getValueAt(int row, int column){
        Object o = tabledata[row][column];
        if (o == null) return null;      
        else{
            if (o.toString().equals("false"))
                return new Boolean(false);
            else if (o.toString().equals("true"))
                return new Boolean(true);
            else
                return o.toString();
    public JViewport getViewport(){
        return viewport;
    public void selectionMultiple(boolean b){
        if (b)
            table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
        else
            table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    * Delegacion del evento 'ListSelection' que tiene lugar cuando un valor es cambiado.
    * @param event - evento de 'ListSelection'.
    public void valueChanged(ListSelectionEvent event){
        ListSelectionModel lsm = (ListSelectionModel) event.getSource();
        if (!lsm.isSelectionEmpty())
                int selectedRow = lsm.getMinSelectionIndex();
    public void showInfo(String tittle){
        System.out.println("\n-------------------------------\n" + tittle + " : ");
        /*Accedim al objecte JTable que hi ha al JViewport*/
        System.out.println("showInfo: elperlaTableModel: Dentro de viewport. ");
        System.out.println(viewport.getComponent(0).getClass().toString());
        JTable table = (JTable)viewport.getComponent(0);
}Finally, my problem is this.
This Table Model works OK but when in the aplication I want to check or uncheck the cell that has the boolean data (but print with a great check box) I can't.
Previosly I made this column editable with the setEditableColumn() method of my Table Model but in the table it don't change. If the initial value is false, that cell always be false (unchecked box) or inverse.
How I can make this cell can be check and unchecked?
THANKS A LOT.
Message was edited by:
Kefalegereta
Message was edited by:
Kefalegereta

Answer 1

I made my own Table Model with this simple characteristicsWhy go to all that trouble. The DefaultTableModel will work. Just override the methods you want to change. Don't create a whole new TableModel.
The problem is that you are storing the strings "true" and "false" in your table. You should be storing Boolean.TRUE and Boolean.FALSE.
Read the Swing tutorial on using tables for a working example.