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

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Message Edited by Mark Yedinak on 02-17-2010 02:32 PM
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

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Hi,
I am using JTable and facing following problem. My UI has a JTable and JButton with mnemonic set. The button populates the date into the table. Here is the sequence
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Hi,
It works in normal scenaios. I faced problem in following
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Sachin

JTable cell edits return to original values

Hi
I am making some progress with using AbstractTableModel, however I have a problem whereby any edits that I make to cells within the table are being lost when I add a new row��the original values are re-appearing.
I have searched through the forum looking for a solution but with no success thus far.
I believe that the solution lies with the fireTableDataChanged() method but thus far I have had no success. My problem (I believe) is that I cannot work out how to fire it when a user leaves the newly edited cell.
The method that adds the new rows is shown below and is called from a button on the Frame that houses the jTable. I have tried firing the method from here, hoping that all table edits will persist, but unfortunately they still disappear.
public void fillTable()
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GB

Thanks again for the replies people.
I decided to edit this message and post updated code which can be seen below. This is a result of re-reading the helpfull advice from both azukov and camickr who took the time to respond to my initial request for help. I still have to work out how to validate user input but am sure that the tableChanged method will be the key.
A simple tutorial also provided great assistance, especially helping eith the implementation of the TableModelListener. I have provided a link to the tutorial here:
http://www.javalobby.org/articles/jtable/
The coding was carried out in netbeans 5.5, libraries have not been included.
Here is my updated code......table model first:
public class MyJobItemTableModel extends AbstractTableModel
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    int c;
    ArrayList items;        //Stores the objects that provide the records
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            case 2:
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            case 0:
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                break;
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                break;
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}......and now the view (what the user sees)
public class ViewItems extends javax.swing.JPanel
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        initComponents();
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                    public void windowClosing(WindowEvent evt)
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            catch (Exception e)
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         * 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 ">
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            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
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            .add(layout.createSequentialGroup()
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How to set JTable cell editable/non-editable dynamically using NetBean?

I am using NetBean 6.5, create a database desktop application, I using the persistence entity manager to bind my JTable with database.
Now, I want to set practicular cells which are enable and disable, I tried to create my own table model and override the isEditable() method, which it seems didn't work. I guessed the problem is the persistence connection between my Table and database.
How can I solve it? Any example? I just googled the web and can't find example which use netbean combined with database. I know that a single JTable would work when creating your own model.
thx.

I know what coding i did, Yes u r right but im new to GUI programming only,
That's why i posted it to forums, I gone through the Control Flow Statements link what u have given.
U didnt get my question at all.
Again the problem im facing is the table is already displayed with 2nd column uneditable.
When some Action done on table, i need to make 2nd column editable at run time.
Thanks if u provide me the solution instead of deciding what type of programmer im.

Prevent jtable cell edit!!!!

when i double click any cell in a table it gets editable. but i dont wish to do this. i want all the cells in the table non editable. so nobody can change the cell content. anyone tell me how to do this. thank you.

Then search the forum for code that uses the isCellEditable(...) method to see examples.
Or you could even read the JTable API of all things. Then follow the link to the Swing tutorial on "How to Use Tables" which also has an example of overriding the isCellEditable(...) method. The code in the tutorial overrides the method of the TableModel. I prefer to override the method in the JTable.

How to edit jtable programmatically?

id like to know how to edit jtable cell programmatically.
thanks!

override
getTableCellEditorComponent in customized
TableCellEditor.Hi,
hmm ... if that's that, what he want to know? - I guess, he wants to know how to change values of the JTable by program.
Every JTable has an underlying TableDataModel that holds the values of the tablecells. You can retrieve this model by the getModel()-method of the JTable.
To get a value from the model use method getValueAt(row,column) of the model.
To set a value in the model use method setValueAt(object,row,column) of the model.
See the TableModel-interface-Documentation for other methods.
greetings Marsian

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have you tried to search in google of SDN before posting?

Stopping cell editing in a JTable using a JComboBox editor w/ AutoComplete

Hi there! Me again with more questions!
I'm trying to figure out the finer parts of JTable navigation and editing controls. It's getting a bit confusing. The main problem I'm trying to solve is how to make a JTable using a combo box editor stop editing by hitting the 'enter' key in the same fashion as a JTextField editor. This is no regular DefaultCellEditor though -- it's one that uses the SwingX AutoCompleteDecorator. I have an SSCCE that demonstrates the issue:
import java.awt.Component;
import java.awt.EventQueue;
import javax.swing.AbstractCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableModel;
import org.jdesktop.swingx.autocomplete.AutoCompleteDecorator;
public class AutoCompleteCellEditorTest extends JFrame {
public AutoCompleteCellEditorTest() {
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private class ComboCellEditor extends AbstractCellEditor implements TableCellEditor {
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public static void main(String[] args) {
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}Problem 1: Starting to 'type' into the AutoCompleteDecorate combo box doesn't cause it to start editing. You have to hit F2, it would appear. I've also noticed this behaviour with other JComboBox editors. Ideally that would be fixed too. Not sure how to do this one.
Problem 2: After editing has started (say, with the F2 key), you may start typing. If you type one of A, B, C, or D, the item appears. That's all good. Then you try to 'complete' the edit by hitting the 'enter' key... and nothing happens. The 'tab' key works, but it puts you to the next cell. I would like to make the 'enter' key stop editing, and stay in the current cell.
I found some stuff online suggesting you take the input map of the table and set the Enter key so that it does the same thing as tab. Even though that's not exactly what I desired (I wanted the same cell to be active), it didn't work anyway.
I also tried setting a property on the JComboBox that says that it's a table cell editor combo box (just like the DefaultCellEditor), but that didn't work either. I think the reason that fails is because the AutoCompleteDecorator sets isEditable to true, and that seems to stop the enter key from doing anything.
After tracing endless paths through processKeyBindings calls, I'm not sure I'm any closer to a solution. I feel like this should be a fairly straightforward thing but I'm having a fair amount of difficulty with it.
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Hi Jeanette,
Thanks for your advice. I looked again at the DefaultCellEditor. You are correct that I am not firing messages for fireEditingStopped() and fireEditingCancelled(). Initially I had copied the behaviour from DefaultCellEditor but had trimmed it out. I assumed that since I was extending AbstractCellEditor and it has them implemented correctly that I was OK. But I guess that's not the case! The problem I'm having with implementing the Enter key stopping the editing is that:
1) The DefaultCellEditor stops cell editing on any actionPerformed. Based on my tests, actionPerformed gets called whenever a single key gets pressed. I don't want to end the editing on the AutoCompleteDecorated box immediately -- I'd like to wait until the user is happy with his or her selection and has hit 'Enter' before ending cell editing. Thus, ending cell editing within the actionPerformed listener on the JComboBox (or JXComboBox, as I've made it now) will not work. As soon as you type a single key, if it is valid, the editing ends immediately.
2) I tried to add a key listener to the combo box to pick up on the 'Enter' key and end the editing there. However, it appears that the combo box does not receive the key strokes. I guess they're going to the AutoCompleteDecorator and being consumed there so the combo box does not receive them. If I could pick up on the 'Enter' key there, then that would work too.
I did more reading about input maps and action maps last night. Although informative, I'm not sure how far it got me with this problem because if the text field in the AutoCompleteDecorator takes the keystroke, I'm not sure how I'm going to find out about it in the combo box.
By the way, when you said 'They are fixed... in a recent version of SwingX', does that mean 1.6.2? That's what I'm using.
Thanks!
P.S. - Maybe I should create a new question for this? I wanted to mark your answer as helpful but I already closed the thread by marking the answer to the first part as correct. Sorry!
Edited by: aardvarkk on Jan 27, 2011 7:41 AM - Added SwingX versioning question.

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
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baseCatTable.getColumnModel().getColumn(4).setCellEditor(new DefaultCellEditor(new JComboBox(progCodes)));and when i get the value
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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) {
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            public void actionPerformed(ActionEvent e) {
                statusMessageLabel.setText("");
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        int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
        for (int i = 0; i < busyIcons.length; i++) {
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                        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.

Default behaviour of the Escape key while editing a cell in JTable??

Hi all,
i have a Jtable which get its data from an own model object which extends DefaultTableModel.
If i overwrite the isCellEditable(row, col) method within the tablemodel object and set a specific column to editable, then i notice while editing a cell in that column that the default behaviour of the Escape key is that independet from what you have entered before in to the cell the editing stops and the cell gets the value it had before editing.
This is the case for me even if i apply a custom editor to a column (one that extends DefaultCellEditor). It is just a JTextField that limits the number of digits a user can enter. Everything works fine. If the user edits the cell and presses ENTER or the "down arrow key" i can check what he has entered with the help of the getCellEditorValue() method. But if the user hits the ESC key after editing a cell this method is not invoked!!!
My question is :
is there any way to detect that the user cancels editing with the ESC-key.
this is very important for me because if the user goes editing the cell i lock the related record in the database, if i cannot detect this it is locked till the application terminates.
Thanks for any help in advance

I try override the JTable editingCanceled() ==> does not work.
I try the addCellEditorListener( CellEditorListener l ) ==> does not work.
Finally, I try the addKeyListener ==> it works.
Here is a quick demo. program:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class Test {
public static void main(String[] args){
JFrame f = new JFrame();
String[] colName = {"a", "b"};
String[][] rowData = {{"1", "2"}, {"3", "4"}};
JTable table = new JTable(rowData, colName);
JTextField t = new JTextField(10);
t.setBackground(Color.red);
t.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
// do what ever you want ex. un-lock table
System.out.println("ESCAPE");
DefaultCellEditor editor = new DefaultCellEditor(t);
TableColumnModel colModel = table.getColumnModel();
for (int i = colModel.getColumnCount()-1; i >= 0; i--) {
colModel.getColumn(i).setCellEditor(editor);
f.setContentPane(new JScrollPane(table));
f.pack();
f.setVisible(true);

Start or stop edit jtable cell editing

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