Edit JTable Cell
Hi,ALL
I have create normal JTable.and set all cell Editable.
When I double clike a cell, I can modify the value on the cell.
However, When I use getValueAt(row, col)
it still give me the orginal value, not the modified value!
Do I lost something? Or do I need to implement something else?
any idea would be greated appreciated
It may also depend on when you're calling getValueAt. If you're doing it before the edit has committed to the table model (ie, before setValueAt has been called) then the underlying data won't yet have been updated.
It would be useful if you could supply some example code for what you're trying to do (post it in [ code ] tags please!).
Hope this helps.
Similar Messages
-
Dynamically Rendering and editing JTable cell
Hi all,
I wonder if some body can help me.
As in my application each cell in Jtable returns java Object. and what i am trying to do is based on each object returned in cell my renderer is going to change dynamically. for example if the object returned is primitive data types the renderer is defualt, if the returned object is Map, Set or List, then the Cell Renderer should show clickable button with icon on right hand side and TextField on left hand side and so on for other objects. i am able get renderer for Map, set or list, which is button on right hand side of cell and text field on left hand side displaying toString of Object. then what i want is when i click button it should show those values in popup window and if i double click it should edit the cell which i am able to do it. so how can i handle events or what i have to do to make button clickable. if any body come accross these situations or got idea. please let me know how to move further.
Thanks,
Kotesh.Hi,
Thanks for your advise and as i said i am able to get render for Map as (TextField in left hand side+Button with icon in right hand side side) of Cell. but what i need is when i click button which is on right hand, then i should be able to show popup wvindow with map values and if i double click on TextField which is on right hand side, then i should be able to edit Cell which is happening. but i am not able to get popup window when i click button on right hand side of cell. basically i am not sure how to handle events on cell and the button on right hand side?
if some one can guide me that will be great as i am in big trouble.
Thanks
Kotesh. -
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
ThanksHello,
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 -
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 -
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 -
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 advanceI 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); -
Help with editing a cell in a JTable. DESPERATE
Hi! Is there someone out there that could help with some source code for editing a cell in my JTable when I run it as an applet??
It works fine when I run it as an application.
I manage to select the row and write a number in it, but I can't get out of the cell (it seems that the program stops??). I want to enter an integer in a cell and when I click enter or with the mouse in an other cell the value that I enter should update some other cell( multiply the entered value with some fixed number and update a cell in a second coloumn)
I am really desperate now..... I have thought about using a MouseListener....
I am using a tablemodel that is from AbstractTableModel.Are you using some cell editors?
While converting inside them, you might be getting some exceptions (like parseexception)which is stopping you from proceeding further.
Are you using your own tablemodel with custom datatypes?
Hope this helps,
Ramkumar -
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 PMsorry, 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. -
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,
DI 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. -
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);
} -
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 -
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".
-
JTable cell being edited after model changed.
I have a fairly simple JTable, with a implementation of AbstractTableModel supplying the data. The cells are edited by using a JComboBox. I wrap these into a DefaultCellEditor. I have a KeyListener attached to the JTable listening for VK_DELETE, and when it finds one, instructs the model to delete the row represented by the selected row in the table.
Everything works fine until I want to delete a row from the table. My scenario is:
- I click in a cell, and the editor opens.
- I select an entry in the list. The editor closes, the result is rendered, and the wee yellow box around the cell is shown
- I hit the delete key.
- My key listener picks up the event, and informs the model to delete the row. I remove the row from the model and invoke fireTableDataChanged().
The result is that the row is deleted, but the table ends up with the cell editor deployed on the cell of the row below (which is now at the same row as the one I just deleted).
My tracing shows that the isCellEditable is called on the model after the delete. I don't know why.
Can anyone explain how to prevent this or what might be causing the table to think that the cell needs editing?
Thanks, AndrewIt will do whatever is the default. I wrap the JComboBox in a DefaultCellEditor. I can't see how the editor is involved at this point, or why the editor becomes involved after the row has been deleted.
Remember, at the time that I hit the delete key, there is no editor rendered or visible. I have the JTable displayed, a row selected, and the yellow box around one of the (editable but not currently being edited) cells. This has been achieved by editing a cell (displaying the cell editor - a combo box) and selecting an entry. The editor is removed, and the cell displayed with the (default) cell renderer for the table.
The delete action is caught by the listener on the table, the model is instructed to delete a row from its underlying data, which fires a fireTableDataChanged event.
That is all I do. After that it is all swing. The table model starts getting asked about cells being editable after I have finished deleting the row. I'll post the relevant code below if that helps.
The datamodel is of class ConstraintTableModel (see below) and the column model is of class DefaultTableColumnModel
JTable table = new JTable( dataModel, columnModel );The column model is defined liike so:
columnModel = new DefaultTableColumnModel();
TableColumn labelColumn = new TableColumn(ConstraintTableModel.LABEL_COLUMN);
labelColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.LABEL_COLUMN));
labelColumn.setPreferredWidth( 5 );
labelColumn.setMaxWidth( 5 );
labelColumn.setResizable( false );
TableColumn taskColumn = new TableColumn(ConstraintTableModel.TASK_COLUMN);
taskColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.TASK_COLUMN));
TableColumn typeColumn = new TableColumn(ConstraintTableModel.TYPE_COLUMN);
typeColumn.setHeaderValue( dataModel.getColumnName(ConstraintTableModel.TYPE_COLUMN));
columnModel.addColumn( labelColumn );
columnModel.addColumn( taskColumn );
columnModel.addColumn( typeColumn );I add the key listener like so:
table.addKeyListener( new KeyAdapter()
public void keyPressed( KeyEvent e )
if( e.getKeyCode() == KeyEvent.VK_DELETE )
log.debug("Delete pressed in listener attached to table ");
JTable t = (JTable) e.getSource();
int selectedRow = t.getSelectedRow();
if( selectedRow >= 0 )
log.debug(" Removing row " + selectedRow);
((ConstraintTableModel)t.getModel()).removeRow(selectedRow);
log.debug("Finished with key press");
} );The cell editor is created like this:
JComboBox taskEditorComponent = new JComboBox( tasksModel );
taskEditorComponent.setFont( GanttChart.tableFont );
taskEditorComponent.setBackground( Color.WHITE );
DefaultCellEditor taskEditor = new DefaultCellEditor(taskEditorComponent);
taskEditor.setClickCountToStart( 1 );
table.setDefaultEditor( GanttTask.class, taskEditor );The model is coded like so:
class ConstraintTableModel extends AbstractTableModel
// Constants
public static final int LABEL_COLUMN = 0;
public static final int TASK_COLUMN = 1;
public static final int TYPE_COLUMN = 2;
private Vector columnNames;
private ArrayList dataRows;
public ConstraintTableModel()
super();
this.buildDataVector();
this.addPrimerRow();
* Every row in the table is a GanttConstraint. Therefore when deciding what to
* display in any particular column of the table, we need to determine what the
* column is, and then use the informatino in the GanttConstraint to go out to the
* lookup and get the relevant object, and value to display.
public Object getValueAt( int row, int col )
Object returnObject = "";
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
// We're rendering the task column. If there's no task id (partially filled in row)
// return blank otherwise return the master task
else if( col == ConstraintTableModel.TASK_COLUMN )
if( aConstraint.getMasterId() != null )
GanttTask masterTask = (GanttTask) real.getLookup().get( aConstraint.getMasterId() );
returnObject = masterTask;
// We're rendering the type column. If there's no type (partially filled in row)
// return blank otherwise return the constraint type
else if( col == ConstraintTableModel.TYPE_COLUMN )
if( aConstraint.getType() != null )
GanttConstraintType constraintType = (GanttConstraintType) GanttConstraintType.getConstraintTypes()
.get( aConstraint.getType()
.intValue() );
returnObject = constraintType;
return returnObject;
* When we receive this message, we are handed an object of the type specified in
* getColumnClass. We need to take this object and place the relevant information into
* the GanttConstraint row in the table model.
* Depending on whether the row being modified is an existing row or a new row, set
* the state of the constraint appropriately.
* @see javax.swing.table.TableModel#setValueAt(java.lang.Object, int, int)
public void setValueAt( Object value, int row, int col )
log.debug( "+setValueAt (row/col) " + row + "/" + col );
if ( value == null )
log.debug( " handed a null value. Returning" );
return;
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
// If we are modifying the primer row, add another primer row.
if( row == ( this.getRowCount() - 1 ) ) // Last row is always the primer
log.debug( " adding a primer row" );
this.addPrimerRow();
// We're modifying the Task data. Get the GanttTask handed to us and place it
// into the master slot in the constraint.
if( col == ConstraintTableModel.TASK_COLUMN ) // Task
log.debug( " updating the master task" );
GanttTask selectedTask = (GanttTask) value;
aConstraint.setMaster( selectedTask );
// We're modifying the Type data. Get the GanttConstraintType handed to us and place it
// into the type slot in the constraint.
if( col == ConstraintTableModel.TYPE_COLUMN ) // Constraint type
log.debug( " updating the constraint type" );
GanttConstraintType selectedConstraintType = (GanttConstraintType) value;
aConstraint.setType( selectedConstraintType.getType() );
log.debug( "-setValueAt" );
public Class getColumnClass( int col )
Class columnClass = super.getColumnClass( col );
if( col == ConstraintTableModel.LABEL_COLUMN )
columnClass = String.class;
if( col == ConstraintTableModel.TASK_COLUMN )
columnClass = GanttTask.class;
if( col == ConstraintTableModel.TYPE_COLUMN )
columnClass = GanttConstraintType.class;
return columnClass;
// We are handing the data storage
public void setDataRows( ArrayList dataRows )
this.dataRows = dataRows;
public boolean isCellEditable( int row, int col )
log.debug( "+isCellEditable (row/col) " + row + "/" + col );
if( !real.canEdit() )
return false;
if( ( col == ConstraintTableModel.TASK_COLUMN ) ||
( col == ConstraintTableModel.TYPE_COLUMN ) )
return true;
else
return false;
// We are handing the data storage
public ArrayList getDataRows()
return this.dataRows;
public String getColumnName( int column )
return (String) this.getColumnNames().get( column );
* Clean up rows that do not have both the master task and type set. Not interested in them
public void removeDirtyRows()
log.debug( "+removeDirtyRows" );
Iterator dataIterator = this.getDataRows().iterator();
while( dataIterator.hasNext() )
GanttConstraint element = (GanttConstraint) dataIterator.next();
if( ( element.getMasterId() == null ) || ( element.getType() == null ) )
element.setTransient();
dataIterator.remove();
fireTableDataChanged();
log.debug( "-removeDirtyRows" );
public void removeRow( int row )
log.debug( "+removeRow(" + row + ")" );
if( row < this.getDataRows().size() )
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
this.getDataRows().remove( row );
if( aConstraint.isClone() )
aConstraint.setDeleted();
else
aConstraint.setTransient();
getClone().removeConstraint( aConstraint );
fireTableDataChanged();
if( this.getRowCount() == 0 )
this.addPrimerRow();
log.debug( "-removeRow" );
public void clearRow( int row )
log.debug( "+clearRow(" + row + ")" );
if( row < this.getDataRows().size() )
GanttConstraint aConstraint = (GanttConstraint) this.getDataRows().get( row );
aConstraint.setMasterId( null );
aConstraint.setType( null );
fireTableRowsUpdated( row, row );
log.debug( "-clearRow" );
public int getColumnCount()
return getColumnNames().size();
public int getRowCount()
return dataRows.size();
* The table will be filled with constraints relevant to 'clone'.
private void buildDataVector()
ArrayList data = new ArrayList( 1 );
Collection allConstraints = getClone().getStartConstraints();
allConstraints.addAll( getClone().getEndConstraints() );
Iterator constraintIter = allConstraints.iterator();
while( constraintIter.hasNext() )
GanttConstraint element = (GanttConstraint) constraintIter.next();
if( element.getType().equals( GanttConstraint.START_SPECIFIED ) ||
element.getType().equals( GanttConstraint.FINISH_FROM_DURATION ) )
continue;
else
data.add( element );
this.setDataRows( data );
private Vector getColumnNames()
if( columnNames == null )
columnNames = new Vector( 3 );
columnNames.add( " " ); // Needs space otherwise all the headers disappear
columnNames.add( "Task" );
columnNames.add( "Constraint" );
return columnNames;
private void addPrimerRow()
log.debug( "+addPrimerRow" );
// Create a constraint for the 'clone' task. Set it as transient until validation
// where we will deal with it if necessary.
GanttConstraint primer = new GanttConstraint( real.getLookup() );
primer.setObjectId( chart.getNextUniqueId() );
primer.setTransient();
primer.setSlave( getClone() );
primer.setProject( getClone().getProject() );
getClone().addConstraint( primer );
this.getDataRows().add( primer );
int lastRow = this.getRowCount() - 1;
fireTableRowsInserted( lastRow, lastRow );
log.debug( "-addPrimerRow" ); -
JTable edits wrong cell on mouseclick
I am using an editable JComboBox as my cell editor. When the user is editing a cell and clicks on another cell with the mouse, the value of the cell they were editing is inserted into the cell that they clicked on. Can anyone please help me. Thanks.
The Swing tutorial has a working example:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#combobox -
Can not show the JCheckBox in JTable cell
I want to place a JCheckBox in one JTable cell, i do as below:
i want the column "d" be a check box which indicates "true" or "false".
String[] columnNames = {"a","b","c","d"};
Object[][] rowData = {{"", "", "", Boolean.FALSE}};
tableModel = new DefaultTableModel(rowData, columnNames);
dataTable = new JTable(tableModel);
dataTable.getColumnModel().getColumn(3).setCellEditor(new DefaultCellEditor(new JCheckBox()));
But when i run it, the "d" column show the string "false" or "true", not the check box i wanted.
I do not understand it, can you help me?
Thank you very much!
coral9527Do not use DefaultTableModel, create your own table model and you should implement the method
getColumnClass to display the boolean as checkbox ...
I hope the following colde snippet helps you :
class MyModel extends AbstractTableModel {
private String[] columnNames = {"c1",
"c2"};
public Object[][] data ={{Boolean.valueOf(true),"c1d1"}};
public int getColumnCount() {
//System.out.println("Calling getColumnCount");
return columnNames.length;
public int getRowCount() {
//System.out.println("Calling row count");
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* 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();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
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