Edit a JTable cell by clicking at it once - is it possible?

If I want to edit a cell in a JTable, I have to doubleclick on it. Is it possible to set the JTable cells to be in edit mode by just clicking at the cells once?

Did you search the forums?? How about something like "jtable-edit-single-click".

Similar Messages

Edit a JTable cell, click save button, value isn't stored in JTable

I'm editing a JTable cell, just using default editor provided by JTable
I click a save button elsewhere in my GUI
The value typed into the cell so far isn't stored in the TableModel yet and so doesn't get saved.
How can I make sure the value gets stored in the JTable in the above scenario when the JButton is pressed but before saving.
Preferably I'd like the code with the JButton not to have to know about the JTable at all.
Cheers,
D

I the forums 100s of times.Many thanks. If they had a decent search on this forum I might have found it as I did try.
Come to think of it - Sun have completely fcukd up this forum.

Returning index of selected comp... jComboBox that is editing a jTable cell

so, i'm using an array to populate the choices of a combobox
    public String[] progCodes = new String[]{"Standard","Restricted","Combined","Special"};which i'm using to edit a cell in a jtable
baseCatTable.getColumnModel().getColumn(4).setCellEditor(new DefaultCellEditor(new JComboBox(progCodes)));and when i get the value
System.out.println(baseCatTable.getValueAt(0, 4))i'd like to return the index of the selected item in the combo box instead of the text:
Standard
any suggestions?
Edited by: hansbig on Jan 24, 2008 5:04 PM

sorry, but i'm using an IDE and it generates a lot of fluffy code.
* ProblemView.java
package problem;
import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
* The application's main frame.
public class ProblemView extends FrameView {
    public ProblemView(SingleFrameApplication app) {
        super(app);
        initComponents();
        edit = new JComboBox(words);
        // status bar initialization - message timeout, idle icon and busy animation, etc
        ResourceMap resourceMap = getResourceMap();
        int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
        messageTimer = new Timer(messageTimeout, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
        messageTimer.setRepeats(false);
        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
            busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
        busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
                statusAnimationLabel.setIcon(busyIcons[busyIconIndex]);
        idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
        statusAnimationLabel.setIcon(idleIcon);
        progressBar.setVisible(false);
        // connecting action tasks to status bar via TaskMonitor
        TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
        taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
            public void propertyChange(java.beans.PropertyChangeEvent evt) {
                String propertyName = evt.getPropertyName();
                if ("started".equals(propertyName)) {
                    if (!busyIconTimer.isRunning()) {
                        statusAnimationLabel.setIcon(busyIcons[0]);
                        busyIconIndex = 0;
                        busyIconTimer.start();
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(true);
                } else if ("done".equals(propertyName)) {
                    busyIconTimer.stop();
                    statusAnimationLabel.setIcon(idleIcon);
                    progressBar.setVisible(false);
                    progressBar.setValue(0);
                } else if ("message".equals(propertyName)) {
                    String text = (String)(evt.getNewValue());
                    statusMessageLabel.setText((text == null) ? "" : text);
                    messageTimer.restart();
                } else if ("progress".equals(propertyName)) {
                    int value = (Integer)(evt.getNewValue());
                    progressBar.setVisible(true);
                    progressBar.setIndeterminate(false);
                    progressBar.setValue(value);
    @Action
    public void showAboutBox() {
        if (aboutBox == null) {
            JFrame mainFrame = ProblemApp.getApplication().getMainFrame();
            aboutBox = new ProblemAboutBox(mainFrame);
            aboutBox.setLocationRelativeTo(mainFrame);
        ProblemApp.getApplication().show(aboutBox);
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        mainPanel = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();
        menuBar = new javax.swing.JMenuBar();
        javax.swing.JMenu fileMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
        javax.swing.JMenu helpMenu = new javax.swing.JMenu();
        javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
        statusPanel = new javax.swing.JPanel();
        javax.swing.JSeparator statusPanelSeparator = new javax.swing.JSeparator();
        statusMessageLabel = new javax.swing.JLabel();
        statusAnimationLabel = new javax.swing.JLabel();
        progressBar = new javax.swing.JProgressBar();
        mainPanel.setName("mainPanel"); // NOI18N
        jScrollPane1.setName("jScrollPane1"); // NOI18N
        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null}
            new String [] {
                "Title 1"
        jTable1.setColumnSelectionAllowed(true);
        jTable1.setName("jTable1"); // NOI18N
        jScrollPane1.setViewportView(jTable1);
        jTable1.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jTable1.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(edit));
        org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(problem.ProblemApp.class).getContext().getResourceMap(ProblemView.class);
        jButton1.setText(resourceMap.getString("jButton1.text")); // NOI18N
        jButton1.setName("jButton1"); // NOI18N
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
        mainPanel.setLayout(mainPanelLayout);
        mainPanelLayout.setHorizontalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 166, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(mainPanelLayout.createSequentialGroup()
                        .addGap(46, 46, 46)
                        .addComponent(jButton1)))
                .addContainerGap(12, Short.MAX_VALUE))
        mainPanelLayout.setVerticalGroup(
            mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(mainPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addContainerGap(18, Short.MAX_VALUE))
        menuBar.setName("menuBar"); // NOI18N
        fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
        fileMenu.setName("fileMenu"); // NOI18N
        javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(problem.ProblemApp.class).getContext().getActionMap(ProblemView.class, this);
        exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
        exitMenuItem.setName("exitMenuItem"); // NOI18N
        fileMenu.add(exitMenuItem);
        menuBar.add(fileMenu);
        helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
        helpMenu.setName("helpMenu"); // NOI18N
        aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
        aboutMenuItem.setName("aboutMenuItem"); // NOI18N
        helpMenu.add(aboutMenuItem);
        menuBar.add(helpMenu);
        statusPanel.setName("statusPanel"); // NOI18N
        statusPanelSeparator.setName("statusPanelSeparator"); // NOI18N
        statusMessageLabel.setName("statusMessageLabel"); // NOI18N
        statusAnimationLabel.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        statusAnimationLabel.setName("statusAnimationLabel"); // NOI18N
        progressBar.setName("progressBar"); // NOI18N
        javax.swing.GroupLayout statusPanelLayout = new javax.swing.GroupLayout(statusPanel);
        statusPanel.setLayout(statusPanelLayout);
        statusPanelLayout.setHorizontalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(statusPanelSeparator, javax.swing.GroupLayout.DEFAULT_SIZE, 188, Short.MAX_VALUE)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(statusMessageLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 14, Short.MAX_VALUE)
                .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(statusAnimationLabel)
                .addContainerGap())
        statusPanelLayout.setVerticalGroup(
            statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(statusPanelLayout.createSequentialGroup()
                .addComponent(statusPanelSeparator, javax.swing.GroupLayout.PREFERRED_SIZE, 2, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(statusPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(statusMessageLabel)
                    .addComponent(statusAnimationLabel)
                    .addComponent(progressBar, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(3, 3, 3))
        setComponent(mainPanel);
        setMenuBar(menuBar);
        setStatusBar(statusPanel);
    }// </editor-fold>
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        System.out.println(jTable1.getValueAt(0, 0));
        System.out.println(edit.getSelectedIndex());
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    private javax.swing.JPanel mainPanel;
    private javax.swing.JMenuBar menuBar;
    private javax.swing.JProgressBar progressBar;
    private javax.swing.JLabel statusAnimationLabel;
    private javax.swing.JLabel statusMessageLabel;
    private javax.swing.JPanel statusPanel;
    // End of variables declaration
    public String[] words = new String[]{"one","two"};
    public JComboBox edit;
    private final Timer messageTimer;
    private final Timer busyIconTimer;
    private final Icon idleIcon;
    private final Icon[] busyIcons = new Icon[15];
    private int busyIconIndex = 0;
    private JDialog aboutBox;
* ProblemApp.java
package problem;
import org.jdesktop.application.Application;
import org.jdesktop.application.SingleFrameApplication;
* The main class of the application.
public class ProblemApp extends SingleFrameApplication {
     * At startup create and show the main frame of the application.
    @Override protected void startup() {
        show(new ProblemView(this));
     * This method is to initialize the specified window by injecting resources.
     * Windows shown in our application come fully initialized from the GUI
     * builder, so this additional configuration is not needed.
    @Override protected void configureWindow(java.awt.Window root) {
     * A convenient static getter for the application instance.
     * @return the instance of ProblemApp
    public static ProblemApp getApplication() {
        return Application.getInstance(ProblemApp.class);
     * Main method launching the application.
    public static void main(String[] args) {
        launch(ProblemApp.class, args);
}i'm getting:
init:
deps-jar:
Compiling 1 source file to C:\Documents and Settings\1\My Documents\NetBeansProjects\problem\build\classes
compile:
run:
Jan 24, 2008 7:58:36 PM org.jdesktop.application.Application$1 run
SEVERE: Application class problem.ProblemApp failed to launch
java.lang.NullPointerException
at javax.swing.DefaultCellEditor.<init>(DefaultCellEditor.java:117)
at problem.ProblemView.initComponents(ProblemView.java:136)
at problem.ProblemView.<init>(ProblemView.java:29)
at problem.ProblemApp.startup(ProblemApp.java:19)
at org.jdesktop.application.Application$1.run(Application.java:171)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Exception in thread "AWT-EventQueue-0" java.lang.Error: Application class problem.ProblemApp failed to launch
at org.jdesktop.application.Application$1.run(Application.java:177)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Caused by: java.lang.NullPointerException
at javax.swing.DefaultCellEditor.<init>(DefaultCellEditor.java:117)
at problem.ProblemView.initComponents(ProblemView.java:136)
at problem.ProblemView.<init>(ProblemView.java:29)
at problem.ProblemApp.startup(ProblemApp.java:19)
at org.jdesktop.application.Application$1.run(Application.java:171)
... 8 more
BUILD SUCCESSFUL (total time: 2 seconds)
also, I made a zip file of the project and put it up here:
http://www.geocities.com/hansbigtree/problem.zip
thanks.

Want to edit a JTable cell programatically

I am making use of JTable in my application. I want to start editing a cell at 5th column, prompt user to enter value, as soon as he checks the JCheckbox in the first Column. I have tried in various ways but failed to solve it. Can any one provide a solution for this.

Try something like this.
Note this is untested.
You mak not need the invokeLater.
JCheckBox xb = new JCheckBox("Check Box");
xb.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent ae) {
    SwingUtilities.invokeLater(new Runnable() {
      public void run(){
        table.changeSelection(lastJTable.getSelectedRow(), 5, true, true);
        table.editCellAt(lastJTable.getSelectedRow(), 5);
        Component tec = table.getEditorComponent();
        if (tec!=null){tec.requestFocus();}
        // force filed to be selected
        try {((JTextComponent)tec).selectAll();}
        catch (Exception notTextEx) {}
});rykk

Unable to edit cells in JTable on single click of the cell.

Hi,
I am unable to edit a cell in JTable on single click of the cell. If I double click on the cell, I am able to edit it. Please help me.
Thanks
Subbu

Thanks for all replies. Now, i am able to edit the cell on single click.

Directly enter edit mode of JTable cell

Hi Everyone,
On my UI, i am showing editable JTable. When I click on table's row / cell, it selects the row. Fine.
But I want that it should directly enter edit mode of cell and the whole text is to be selected and highlighted and focussed.
Thus, user can directly type the new text.
Please suggest correct approach to handle this scenario.
Thanks in advance.
Girish Varde.

Here is my attempt at solving this problem:
** For text selection you have two choices. Remove the "xxx" from either
** editCellAt() or prepareEditor() method.
** The difference is in how mouse double clicking works
** To place a cell directly into edit mode, use the changeSelection() method.
** Be aware this will generate a TableModelEvent every time you leave a cell.
** You can also use either of the above text selection methods.
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
public class TableEditCell extends JFrame
     public TableEditCell()
          String[] columnNames = {"Number", "Letter"};
          Object[][] data = { {"1", "A"}, {"2", "B"}, {"3", "C"} };
          JTable table = new JTable(data, columnNames)
               // Place cell in edit mode when it 'gains focus'
               public void xxxchangeSelection(
                    int row, int column, boolean toggle, boolean extend)
                    super.changeSelection(row, column, toggle, extend);
                    if (editCellAt(row, column))
                         getEditorComponent().requestFocusInWindow();
               // Select the text when the cell starts editing
               // a) text will be replaced when you start typing in a cell
               // b) text will be selected when you use F2 to start editing
               // c) text will be selected when double clicking to start editing
               public boolean xxxeditCellAt(int row, int column, EventObject e)
                    boolean result = super.editCellAt(row, column, e);
                    final Component editor = getEditorComponent();
                    if (editor != null && editor instanceof JTextComponent)
                         if (e == null)
                              ((JTextComponent)editor).selectAll();
                         else
                              SwingUtilities.invokeLater(new Runnable()
                                   public void run()
                                        ((JTextComponent)editor).selectAll();
                    return result;
               // Select the text when the cell starts editing
               // a) text will be replaced when you start typing in a cell
               // b) text will be selected when you use F2 to start editing
               // c) caret is placed at end of text when double clicking to start editing
               public Component xxxprepareEditor(
                    TableCellEditor editor, int row, int column)
                    Component c = super.prepareEditor(editor, row, column);
                    if (c instanceof JTextComponent)
                         ((JTextField)c).selectAll();
                    return c;
          JScrollPane scrollPane = new JScrollPane( table );
          getContentPane().add( scrollPane );
     public static void main(String[] args)
          TableEditCell frame = new TableEditCell();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setLocationRelativeTo( null );
          frame.setVisible(true);
}

Start or stop edit jtable cell editing

Hello,
I got a problem with the jtable DefaultModel isCellEditable.
If I set the IsCellEditable to false, I would not be able to enable the cell selection as and when I want it.
What I have in mind is the add a mouselister so that if the user select a row using fast left mouse click like the procedure shown below
private class MouseClickHandler extends MouseAdapter {
public void mouseClicked(MouseEvent event) {
int no_mouseclick = 0;
no_mouseclick = event.getClickCount();
if (no_mouseclick >= 2) {
int cur_row = 0;
cur_row = table.getSelectedRow();
// table.setColumnSelectionAllowed(true);
// table.setRowSelectionAllowed(true);
for (int i=0;i<table.getColumnCount();i++){
table.editCellAt(cur_row,i);
System.out.println("mouse row--->" + cur_row);
I could overwrite the IsCellEditable to true to enable that particular or cell contains in that row to be able to accept input and overwrite any data which in my case obtained from the Sql database a sort of like input module using tabulation . I am also thinking of using text component or combobox to display the value for user selection , but I do not know how to enable a particular cell for editing if the Jtable created is using a non-editable DefaultModel. If I set the IsCellEditable to true, every single cell would be enable for editing , and this defeat the purpose of enable user input only upon double mouseclicks.
By the way , I am interested to know how to track the data changes in the cell within the jtable so that only those have been modified are notify from the Table model and updated into the Sql table
Could anyone of you out there provide some hints please
Thanks

Hello,
Tablemodellistener could detect the changes in the data, how about the backend database updating and transactional activity that must be associated with the data changes?
What is on my mind is that , the moment there is changes in the data detected by the TableModellistener, whatever records associated with or brougt up by Jtable would be all deleted from the database and then follow by the new set of new records to be inserted into the database. The disadvantage of this method is that everytime the backend database connection and activity need to be executed the moment there is a change in the data in the jtable cell. For example the user may be just amendment to only one cell , but all the records associated need to be deleted and then inserted again.
Perhaps there are better solution to deal with Jtable and JDBC backend connection where in this case, I am using JDO to undertake the database activity like the observable modelling .
Could someone provide the hint please
Thank

Problem using an editable JComboBox as JTable cell editor

Hi,
i have a problem using an editable JComboBox as cell editor in a JTable.
When i edit the combo and then I press the TAB or ENTER key then all works fine and the value in the TableModel is updated with the edited one, but if i leave the cell with the mouse then the value is not passed to the TableModel. Why ? Is there a way to solve this problem ?
Regards
sergio sette

if (v1.4) [url
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JTa
le.html#setSurrendersFocusOnKeystroke(boolean)]go
hereelse [url
http://forum.java.sun.com/thread.jsp?forum=57&thread=43
440]go here
Thank you. I've also found this one (the first reply): http://forum.java.sun.com/thread.jsp?forum=57&thread=124361 Works fine for me.
Regards
sergio sette

Multiple JButtons inside JTable cell - Dispatch mouse clicks

Hi.
I know this subject has already some discussions on the forum, but I can't seem to find anything that solves my problem.
In my application, every JTable cell is a JPanel, that using a GridLayout, places vertically several JPanel's witch using an Overlay layout contains a JLabel and a JButton.
As you can see, its a fairly complex cell...
Unfortunately, because I use several JButtons in several locations inside a JTable cell, sometimes I can't get the mouse clicks to make through.
This is my Table custom renderer:
public class TimeTableRenderer implements TableCellRenderer {
     Border unselectedBorder = null;
     Border selectedBorder = null;
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
               boolean hasFocus, int row, int column) {
          if (value instanceof BlocoGrid) {
               if (isSelected) {
                    if (selectedBorder == null)
                         selectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getSelectionBackground());
                    ((BlocoGrid) value).setBorder(selectedBorder);
               } else {
                    if (unselectedBorder == null)
                         unselectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getBackground());
                    ((BlocoGrid) value).setBorder(unselectedBorder);
          return (Component) value;
}and this is my custom editor (so clicks can get passed on):
public class TimeTableEditor extends AbstractCellEditor implements TableCellEditor {
     private TimeTableRenderer render = null;
     public TimeTableEditor() {
          render = new TimeTableRenderer();
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int column) {
         if (value instanceof BlocoGrid) {
              if (((BlocoGrid) value).barras.size() > 0) {
                   return render.getTableCellRendererComponent(table, value, isSelected, true, row, column);
         return null;
    public Object getCellEditorValue() {
        return null;
}As you can see, both the renderer and editor return the same component that cames from the JTable model (all table values (components) only get instantiated once, so the same component is passed on to the renderer and editor).
Is this the most correct way to get clicks to the cell component?
Please check the screenshot below to see how the JButtons get placed inside the cell:
http://img141.imageshack.us/my.php?image=calendarxo9.jpg
If you need more info, please say so.
Thanks.

My mistake... It worked fine. The cell span code was malfunctioning. Thanks anyway.

Non-editable JTable cells?

Is there any way to make all the cells in a JTable non-editable? In the API I see the isEditable method, but no setEditable method. Any suggestions?

You have to set it in the TableModel.
TableModel model = new AbstractTableModel()
public int getRowCount()
return 10;
public int getColumnCount()
return 5;
public Object getValueAt(int row, int column)
return "( "+row+","+column+" )";
public boolean isCellEditable(int row,int column)
return false;
The one given above is a sample to show you how to set a cell non-editable on the cell. You have to customize it for your table model.
Thanks,
Kalyan

JTable Cell grays out when I click the cell below (JList editor & renderer)

Click on any cell, then click on the cell immediately below.. and the first cell u clicked on goes gray... After repaints and stuff, it stills stays gray
* TimetableCellGui.java
* Created on April 12, 2007, 7:21 PM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package timetable.gui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.util.ArrayList;
import java.util.EventObject;
import javax.swing.DefaultListModel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
* @author jay
public class TimetableCellGui extends JList implements TableCellRenderer, TableCellEditor {
     * Creates a new instance of TimetableCellGui
    public TimetableCellGui() {
        this.setFont(new Font("Nice",Font.PLAIN,10));
        this.setForeground(new Color(150,150,250));
    private static String courseFilter = "";
    private static String roomFilter = "";
    private static boolean filterCourse = false;
    private static boolean filterRoom = false;
    public static String getCourseFilter() {
        return courseFilter;
    public static String getRoomFilter() {
        return roomFilter;
    public static boolean isFilterCourse() {
        return filterCourse;
    public static boolean isFilterRoom() {
        return filterRoom;
    public static void setCourseFilter(String c) {
        courseFilter = c;
    public static void setFilterCourse(boolean f) {
        filterCourse = f;
    public static void setFilterRoom(boolean filter) {
        filterRoom = filter;
    public static void setRoomFilter(String r) {
        roomFilter = r;
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        if(value == null) {
            return null;
        } else {
            DefaultListModel model = new DefaultListModel();
            String addition = "some addition";
         model.add(addition);
            model.add(addition);
            this.setModel(model);
            return new JScrollPane(this);
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
        if(value == null) {
            return null;
        } else {
            DefaultListModel model = new DefaultListModel();
            String addition = "some addition";
         model.add(addition);
            this.setModel(model);
            return new JScrollPane(this);
    public Object getCellEditorValue() {
        return "helllo";
    public boolean isCellEditable(EventObject anEvent) {
        return true;
    public boolean shouldSelectCell(EventObject anEvent) {
        return true;
    public boolean stopCellEditing() {
        return true;
    public void cancelCellEditing() {
        super.clearSelection();
    public void addCellEditorListener(CellEditorListener l) {
    public void removeCellEditorListener(CellEditorListener l) {
}

I'm doing up a timetable. And so far, I've found that is the best way to display it. However if you can think of a better way, I'm willing to listen, but if u havn't gotten a better suggestion... Plz try and help me tweak this one to work... Because I've done quite a bit of work on this one so far

Problem in event handling of combo box in JTable cell

Hi,
I have a combo box as an editor for a column cells in JTable. I have a event listener for this combo box. When ever I click on the JTable cell whose editor is combo box,
I get the following exception,
Exception occurred during event dispatching:
java.lang.NullPointerException
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.setDispatchComponent(Unknown Source)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(Unknown Source)
     at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Can any one tell me how to over come this problem.
Thanks,
Raghu

Here's an example of the model I used in my JTable. I've placed 2 comboBoxes with no problems.
Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
public boolean isCellEditable(int rowIndex, int columnIndex)
// The 2nd & 3rd column or Value field is editable
if(isEditable)
if(columnIndex > 0)
return true;
return false;
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
* Retrieves number of columns
public synchronized int getColumnCount()
return NUM_COLUMNS;
* Get a column name
public String getColumnName(int col)
return columnNames[col];
* Retrieves number of records
public synchronized int getRowCount()
if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
* Clears all records
public synchronized void clear()
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.removeAllElements();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS)
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
* Loads the values into the combo box within the table for mail id
public void setUpMailColumn(JTable mapTable, ArrayList mailList)
TableColumn col = mapTable.getColumnModel().getColumn(1);
javax.swing.JComboBox comboMail = new javax.swing.JComboBox();
int s = mailList.size();
for(int i=0; i<s; i++)
comboMail.addItem(mailList.get(i));
col.setCellEditor(new DefaultCellEditor(comboMail));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for mail Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Mail Id to see a list of choices");
* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
for(int i=0; i<s; i++)
combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
}

Can JTable cell acts as JList?

I was planning to create an Event Calendar view in Monthly. Currently my jTable cell extends JTextArea. My problem is that, for example, today I got 2 events display in one cell, when a user double-click the "today" cell, an edit form will pop out, if there are 2 events in one cell, how I know which events to be edit? In this case I was thinking to use JList instaed of jTextArea. so i can choose which event to be edit. Is there any example showing how to implement jTable with jList cell? or is there any other method to overcome it?

I haven't used a JList in a JTable so far, but for a JComboBox you find a working example in the tutorial. That may give you some ideas.
What I did use is a (read only) JTable in a JTable. So if you don't achieve your goal with JList there are alternatives.
But wait for our table specialists to come along.

JTable cell + isSelected, hasFocus, highlighted ??

hi
My JTable has row and column selection disabled, when a cell is clicked, only the outline is highlighted
It seems that when i click a cell in my JTable that said cell is given focus (has its edge highlighted), and when this cell is clicked the second time it is 'selected'. However there is nothing to indicate to the user that the cell is selected, ie its state is still a single line highlighted border. A double click puts the cell in edit mode.
My questions are so:
What state is a cell in when it is internally highlighted with color ?
Why make the distinction (between focus and selection) if its only possible to get selectedRow() and not getRowWithFocus() ?
How can i have it so that a sinlge click makes a cell both selected and with focus, i know its down to changing the cell renderer, i tried 'if (hasFocus) { isSelected = true; } but that wasn't working.
Why does clearSelection not clear the cells which are internally highlighted with color ? And how can i clear those cells ?
Hope someone can help
Thanks

However there is nothing to indicate to the user that the cell is selected, ie its state is still a single line highlighted border.
Why make the distinction (between focus and selection) if its only possible to get selectedRow() and not getRowWithFocus() ?Normally a table operates in row selection mode and all cells in the selected row are highlighted except the cell that has focus, which uses the single line highlighted border.
So, in a table that uses single cell selection there are no other selected cells so you only see the focused cell with the highlighted border. If you want to highlight the focused cell you could try overriding the following method of JTable:
public Component prepareRenderer(TableCellRenderer renderer, int row, int column)
     Component c = super.prepareRenderer(renderer, row, column);
     if (isCellSelected(row, column))
          c.setBackground( getSelectionBackground());
     return c;
}

How to make Jtable cell empty onClick?

Hi All,
I have one requirement where I need to make the Jtable cell value empty on click or tab event. So, User does not have to do back space and delete whole string to edit that cell.
Any idea?
Thanks in advance.

Hi camickr,
Thanks for that reply. It did not work for me but Here is the thing.
My requirement was : Client does not want to do back space in order do edit cell value when that cell clicked.
I tried find the solution that, i can make that cell area as selected when it is clicked. my problem is solved. So, I tried to use Table select all editor.
But here is what i found ......
If I want that cell area selected, I need to do one more click(3 clicks at the same time) to select the value of that cell & I can put my new value without doing back space(stupid client requirement)
Thanks for your help

Edit a JTable cell by clicking at it once - is it possible?

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