Default cell editor extending problem

hello again,
special thanks to camikr, who has helped me a lot in my problems.
now I will like to know should I implement the default cell editor interface or extend the available class to solve my previous problem of validating table cells?
which methods should I concentrate on? I will certainly work on is cell editable but kindly suggest me if I want to prevent the tab key from moving the focus to next cell without satisfying certain conditions, what events or methods should I concentrate. if I want the tab key to be blocked what action should I take?
thanks
Krishnakant.

if I want to prevent the tab key from moving the focus to next cell
without satisfying certain conditions, what events or methods should I concentrateYou where given a working example of this in your last posting:
http://forum.java.sun.com/thread.jspa?threadID=642364&messageID=3786315
The example only overrides two methods. Only one of the methods has validation logic. So I would think it would be obvious which method to concentrate on.

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How do you set a default cell editor for a web dynpro ALV table?

if I want to prevent the tab key from moving the focus to next cell
without satisfying certain conditions, what events or methods should I concentrateYou where given a working example of this in your last posting:
http://forum.java.sun.com/thread.jspa?threadID=642364&messageID=3786315
The example only overrides two methods. Only one of the methods has validation logic. So I would think it would be obvious which method to concentrate on.

JComboBox cell editor *Listener problem

Hi all,
I've setup a TreeTable with a JComboBox as a CellEditor for the second column.
Everything works just fine, except for event handling on a column with a JComboBox as cell editor.
In my case, the second column of the TreeTable represents the state of the activities. This state can be changed either programmatically or by user input. That is, my application can automatically change the state for some reason, or the user can select a new state for a particular activity with the mouse.
What I need to achieve is to capture events generated only from the user.
I've tried different solutions, adding ActionListener or ItemListener to the CellEditor, but they all capture events generated by the application in addition to those generated by the user of the application.
Can someone please give me some advice in this matter?
Xserty

What I need to achieve is to capture events generated only from the user.If you called the JComboBox's dataModel.setSelectedItem method yourself, no event will be fired!Unfortunately, I'm not able to update the dataModel (directly) myself.
I'm currently using the Creating TreeTables: Part 3; here's how it kinda works: my JTreeTable extends JTable. The JTreeTable has a model: TreeTableModel extends DefaultTreeModel implements InterfaceJTreeTableModel. In this model there are two methods implemented as following:
public Object getValueAt(Object pParentNode, int pColumn) {
MutableActivityNode activityNode = (MutableActivityNode) pParentNode;
try {
    switch (pColumn) {
      case 0 :
        return activityNode.getName();
      case 1 :
        return activityNode.getState();
      case 2 :
        return new Boolean(activityNode.isMonitored());
      default :
        // do something
} catch (SecurityException se) {
    // do something
return null;
public void setValueAt(Object pValue, Object pNode, int pColumn) {
MutableActivityNode activityNode = (MutableActivityNode) pNode;
try {
    switch (pColumn) {
      case 1 :
        activityNode.setState((String) pValue);
        break;
      case 2 :
        activityNode.setIsMonitored(((Boolean) pValue).booleanValue());
        break;
      default :
        // do something
} catch (SecurityException se) {
    // do something
}Once I create my JTreeTable (with a model), I set the editor of the second column of my JTreeTable to a JComboBoxCellEditor.
As you may have noticed, all the information are stored in the node of the TreeTableModel and the information is displayed and set by the two methods above.
Thank you anyways for the advice :))
Have you any idea on how I could solve the problem in this case?
Xserty

JTable custom cell editor focus problem

Hi I have created a JTable (using Java 1.4.2) and have three cell Editors, one is a JFormattedTextField, one is a JComboBox and one is a custom cell editor.
When I press tab I can select the cell with the JFormattedTextField and when I start typing the JFormattedTextField accepts my input and it is displayed in the cell. This is the type of behaviour I would like but it does not seem to work for my other 2 cell editors:
When I tab to the JComboBox cell I can see that the cell is selected but typing or using the arrow keys does not allow me to select a new value in the JComboBox. (I have also tried typing space or enter to activate the JComboBox whilst the cell is selected.) The only ways to select a new value at the moment is to first click on the cell with the mouse and then use the keyboard to select a new value. It is like the actual JComboBox is not receiving the focus? Does anyone know how to solve this problem?
I also seem to have the same problem with my custom cell editor. My custom editor is a JPanel which contains JFormattedTextField again I can tab to the cell and see that it is selected but to activate the JFormattedTextField I have to actually select it with the mouse.
I have been stuck on this for some time so if any one has any suggestions they would be much appreciated !

Hi I have created a JTable (using Java 1.4.2) and have three cell Editors, one is a JFormattedTextField, one is a JComboBox and one is a custom cell editor.
When I press tab I can select the cell with the JFormattedTextField and when I start typing the JFormattedTextField accepts my input and it is displayed in the cell. This is the type of behaviour I would like but it does not seem to work for my other 2 cell editors:
When I tab to the JComboBox cell I can see that the cell is selected but typing or using the arrow keys does not allow me to select a new value in the JComboBox. (I have also tried typing space or enter to activate the JComboBox whilst the cell is selected.) The only ways to select a new value at the moment is to first click on the cell with the mouse and then use the keyboard to select a new value. It is like the actual JComboBox is not receiving the focus? Does anyone know how to solve this problem?
I also seem to have the same problem with my custom cell editor. My custom editor is a JPanel which contains JFormattedTextField again I can tab to the cell and see that it is selected but to activate the JFormattedTextField I have to actually select it with the mouse.
I have been stuck on this for some time so if any one has any suggestions they would be much appreciated !

Problem sorting JTable with custom cell editor

Greetings,
I have created a JTable with a JComboBox as the cell editor for the first column. However, I couldn't simply set the default cell editor for the column to be a JComboBox, since the values within the list were different for each row. So instead, I implemented a custom cell editor that is basically just a hashtable of cell editors that allows you to have a different editor for each row in the table (based on the ideas in the EachRowEditor I've seen in some FAQs - see the code below). I also used a custom table model that is essentially like the JDBCAdapter in the Java examples that populates the table with a query to a database.
The problem comes when I try to sort the table using the TableSorter and TableMap classes recommended in the Java Tutorials on JTables. All of the static (uneditable) columns in the JTable sort fine, but the custom cell editor column doesn't sort at all. I think that the problem is that the hashtable storing the cell editors never gets re-ordered, but I can't see a simple way to do that (how to know the old row index verses the new row index after a sort). I think that I could implement this manually, if I knew the old/new indexes...
Here's the code I use to create the JTable:
// Create the Table Model
modelCRM = new ContactTableModel();
// Create the Table Sorter
sorterCRM = new TableSorter(modelCRM);
// Create the table
tblCRM = new JTable(sorterCRM);
// Add the event listener for the sorter
sorterCRM.addMouseListenerToHeaderInTable(tblCRM);
Then, I populate the column for the custom cell editor like this:
// Add the combo box for editing company
TableColumn matchColumn = getTable().getColumn("Match");
RowCellEditor rowEditor = new RowCellEditor();
// loop through and build the combobox for each row
for (int i = 0; i < getTable().getRowCount(); i++) {
JComboBox cb = new JComboBox();
cb.addItem("New");
//... code to populate the combo box (removed for clarity)
rowEditor.add(i,new DefaultCellEditor(cb, i))); //TF
} // end for
matchColumn.setCellEditor(rowEditor);
Any ideas how to do this, or is there a better way to either sort the JTable or use a combobox with different values for each row? Please let me know if more code would help make this clearer...
Thanks,
Ted
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
public class RowCellEditor implements TableCellEditor
protected Hashtable editors;
protected TableCellEditor editor, defaultEditor;
public RowCellEditor()
editors = new Hashtable();
defaultEditor = new DefaultCellEditor(new JTextField());
public void add(int row, TableCellEditor editor)
editors.put(new Integer(row), editor);
public Component getTableCellEditorComponent(JTable table,
Object value,
boolean isSelected,
int row,
int column)
editor = (TableCellEditor) editors.get(new Integer(row));
if (editor == null)
editor = defaultEditor;
return editor.getTableCellEditorComponent(table,
value,
isSelected,
row,
column);
public Object getCellEditorValue() {
return editor.getCellEditorValue();
public boolean stopCellEditing() {
return editor.stopCellEditing();
public void cancelCellEditing() {
editor.cancelCellEditing();
public boolean isCellEditable(EventObject anEvent) {
return true; //TF
//return editor.isCellEditable(anEvent);
public void addCellEditorListener(CellEditorListener l) {
editor.addCellEditorListener(l);
public void removeCellEditorListener(CellEditorListener l) {
editor.removeCellEditorListener(l);
public boolean shouldSelectCell(EventObject anEvent) {
return editor.shouldSelectCell(anEvent);
-------------------

Well, I found a solution in another post
(see http://forum.java.sun.com/thread.jsp?forum=57&thread=175984&message=953833#955064 for more details).
Basically, I use the table sorter to translate the row index for the hashtable of my custom cell editors. I did this by adding this method to the sorter:
// This method is used to get the correct row for the custom cell
// editor (after the table has been sorted)
public int translateRow(int sortedRowIndex)
checkModel();
return indexes[sortedRowIndex];
} // end translateRow()
Then, when I create the custom cell editor, I pass in a reference to the sorter so that when the getTableCellEditorComponent() method is called I can translate the row to the newly sorted row before returning the editor from the hashtable.

JTable & custom cell editor

Hello everyone,
what is the correct way of writing a custom cell editor for a JTable? I followed the example in the Java tutorial ([How to use tables|http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#editor]), but the result is a bit weird. The code I have is the following:
    private class NumericCellEditor extends AbstractCellEditor implements TableCellEditor {
        NumericFTField field = new NumericFTField(threeDecimalsFormat, 3, null, 1);
        public Component getTableCellEditorComponent(JTable table, Object value,
                boolean isSelected, int row, int col) {
            field.setValue(value);
            return field;
        public Object getCellEditorValue() {
            return field.getValue();
        @Override
        public boolean stopCellEditing() {
            if (((NumericFTField)field).verifyDouble()) {
                field.setBorder(new EmptyBorder(0, 0, 0, 0));
                fireEditingStopped();
                return true;
            } else {
                field.setBorder(BorderFactory.createLineBorder(Color.red));
                return false;
    }where the NumericFTField is a class derived from JFormattedTextField that only allows digits, decimal separator, minus and 'E' to be inserted, and it monitors clipboard operations. verifyDouble() is a method of the NumericFTField class that verifies whether the current input can be parsed to a double and whether it satisfies everything it should. This is then used in
((TableColumn)jTblSpecs.getColumnModel().getColumn(1)).setCellEditor(new NumericCellEditor());The NumericFTField class works great, I use it also in place of a JTextFields, so I'd say there is nothing wrong with it.
After I click in a cell (single click), it behaves a little different that the default cell editor: the cell is not highlighted, but it immediately jumps to the editing state (why???). I, indeed, can insert the allowed characters only. When I click in a cell, do some editing and press Enter, the cell's content gets validated. If it is invalid, stopCellEditing() method does its magic; if it is valid, the caret disappears and everything SEEMS okay. However, if I started typing at this point, the cell reverts to the editing state, but now I am able to enter any character I want. It truly looks like the cell editor is now some other component, not the original NumericFTField one. What is going on here?
It would be great is someone could provide a short schematic source of a custom cell editor class that would work exactly as the JTable's default one except it would only permit digits and so on. It doesn't have to be anything fancy, just a "skeleton" of the class with comments like "input verification here" etc.
I am sorry for any lack of clarity, but I am still a Java newbie.
Any help would be much appreciated.
Best regards,
vt

Hi,
I am also facing the same problem. In addition to what you have specified, my requirement is to be able to select multiple rows for deletion. But, the very first row selected using mouse is not visible as selected though its selected. The other rows are visible as selected.
If you can use any JDK version, start using JDK1.6. You will not be facing this problem. There were so many changes done for swings from JDK 1.4 to 1.6. But, I have to strictly use JDK1.4, but could not find any workaround for this problem.
It would be great if anyone can help me out in this issue to get workaround for this problem.

Setting JTable cell editor

Hallo,
I have troubles setting jtable cell edtior. when i run code below, editor stays unchnaged.
Do you know where's the problem, please (except in programmer^_^) ???
import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class Test extends JFrame {
    JTable table;
    Test() {
        // Create table model
        table = new JTable();
        table.setModel(new DefaultTableModel(
            new Object[][] {
                { Boolean.TRUE, Integer.valueOf(10) },
                { "Hallo!", Boolean.FALSE },
            }, new String[] { "Col1", "Col2" }));
        // Setup frame a little
        setLayout(new BorderLayout());
        setBounds(new Rectangle(300,300,200,100));
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        add(table,BorderLayout.CENTER);
         * Two calls below have no effect:-(
         * What did i wrong?
        // set cell editor for all cells
        table.setCellEditor(new DefaultCellEditor(
                new JComboBox(new String[] { "0", "1" }) ));
        // Use checkbox for booleans
        table.setDefaultEditor(Boolean.class, new DefaultCellEditor(
                new JCheckBox() ));
        // Use combobox for strings
        table.setDefaultEditor(String.class, new DefaultCellEditor(
                new JComboBox( new String[] { "Hallo!", "Bye!" } ) ));
    public static void main(String[] arg) {
        Test test = new Test();
        test.setVisible(true);
}

Hi again,
yes it works when i set it for single column, but i'd like to use default editor, because column count is not fixed.
According to documentation: "Sets a default cell editor to be used if no editor has been set in a TableColumn. If no editing is required in a table, or a particular column in a table, uses the isCellEditable method in the TableModel interface to ensure that this JTable will not start an editor in these columns. If editor is null, removes the default editor for this column class."
So when i call
column.setCellEditor(null); in TableColumnModelListener columnAdded event. But still it's not working. See sample below (i've changed it to cell renderer coz result is clear on single view, but problem stays same)
More over problem seems to be with algoritm that decide which class to use. Object takes preference any time. W/o it npe arries.
Regards
Adam
import java.awt.*;
import javax.swing.*;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
public class Test extends JFrame {
    JTable table;
    Test() {
        // Create table model
        table = new JTable();
        table.setModel(new DefaultTableModel(
            new Object[][] {
                { Boolean.TRUE, Integer.valueOf(10) },
                { "Hallo!", Boolean.FALSE },
            }, new String[] { "Col1", "Col2" }));
        // Setup frame a little
        setLayout(new BorderLayout());
        setBounds(new Rectangle(300,300,200,100));
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        add(table,BorderLayout.CENTER);
        table.setDefaultRenderer(Object.class,new Renderer(Color.YELLOW));
        table.setDefaultRenderer(String.class,new Renderer(Color.BLUE));
        table.setDefaultRenderer(Boolean.class,new Renderer(Color.RED));
        table.setDefaultRenderer(Integer.class,new Renderer(Color.GREEN));
        // use default renderer in all columns
        table.getColumn(table.getColumnName(0)).setCellRenderer(null);
        table.getColumn(table.getColumnName(0)).setCellRenderer(null);
    public static void main(String[] arg) {
        Test test = new Test();
        test.setVisible(true);
    class Renderer extends DefaultTableCellRenderer {
        Color color;
        Renderer(Color color) { this.color = color; }
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int row, int column) {
            super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
            setBackground(color);
            setToolTipText("Class is "+value.getClass().getName());
            return this;
}Message was edited by:
a3cchan

JTable cell editor popup

Hi All
I created a CalendarPanel, which contains a combobox for months and a spinner for year and grid of JLabels to display dates.
And, a JTable with a cell which holds a date value. I created a cell editor with JSpinner to increment or decrement date by 1, which is practically not good. So I added a button top popup the calendar and user selects the date.
Cell editor is a JPanel with a spinner and a small JButton. The click event of this button shows a Calendar (another JPanel) in which we can select the date.
The spinner in the cell editor and the Calendar are linked to each other so that if user clicks on the spinner to change the date, that change reflects in the calendar also, and vice versa.
I am able to popup the calendar on top of JTable at appropriate location (exactly below the cell) and when user selects the date it changes the value of spinner and vice versa.
With this I have two problems.
1. When user clicks on some other area of the calendar (except spinner) the calendar should automatically disappear. Right now when user double clicks on the date it disappears.
2. In the calendar panel when I click on combo box to select the month or on the spinner to change the year - table cell is losing its focus and stopping the cell editing, means no link with calendar and the cell. But this is not happening with the label click (I guess this is because JLabels have no focus)
How can I solve these 2.
Thanks in advance.

1. When user clicks on some other area of the calendar
(except spinner) the calendar should automatically
disappear. Right now when user double clicks on the
date it disappears. Add a mouse listener to the other components that updates the calendar, the setVisible(false).
2. In the calendar panel when I click on combo box to
select the month or on the spinner to change the year
- table cell is losing its focus and stopping the cell
editing, means no link with calendar and the cell. But
this is not happening with the label click (I guess
this is because JLabels have no focus)
Have your cell editor extend DefaultCellEditor. In the constructor, set the editorComponent to your new calendar component. Add a mouse listener (adapter) to the editorComponent - in mouseClicked, call stopCellEditing().

JTable Cell Editor Problems

Hi All,
I have a problem concerning the editing for my table. When I click on a column a dialog box opens up and the user picks the values he wants. But after he presses ok in the dialog box the user again has to press enter in the selected cell or click on another cell in the table for the selected cell to lose focus.I am using a textfield as the returning component in the getcomponent method for the the table cell editor. Is there a way I can force the textfield to register an enter automatically so it loses focus or is there another way?
Thanks, in advance.

this is how my code is structured:
public class MyTableCellEditor extends AbstractCellEditor implements TableCellEditor,
     ActionListener{
     private static final long serialVersionUID = 0;
     private int clickCountToStart = 2; // Default value is double click
     private JFrame editingFrame;
     // This is the component that will handle the editing of the cell value
     JTextField txtresult = new JTextField(10);
     String result = null;
     public MyTableCellEditor(JFrame jframe){
          //txtresult.addActionListener(this);
          editingFrame = jframe;
    public int getClickCountToStart(){
        return clickCountToStart;
    public int setClickCountToStart(int c){
        clickCountToStart = c;
         return clickCountToStart;
    public boolean isCellEditable(EventObject e){
        if(e instanceof MouseEvent){
             if(((MouseEvent)e).getClickCount()>=this.getClickCountToStart()){
                  return true;
        return false;
    public boolean stopCellEditing(){
         fireEditingStopped();
         return true;
    // This method is called when a cell value is edited by the user.
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int col) {
         // Make certain columns non editable
         if(table.getColumnName(col).equals("Sub Number")){
              return null;
         else if(table.getColumnName(col).equals("Transmitter#/Receiver#")){
              return null;
         if(table.getColumnName(col).equals("TOOLMODE")){
              result = toolModeModify();
             if(result==null){
                  result = value.toString();
              if(result != null){
                  txtresult.setText(result);
             else{
                  txtresult.setText(value.toString());
        else{
             result = ModifyCell();
             if(result != null){
                  txtresult.setText(result);
             else{
                  if(value != null){
                       txtresult.setText(value.toString());
         txtresult.setEditable(false);
         return txtresult;
    public void actionPerformed(ActionEvent e) {
        //stopCellEditing(); //Make the renderer reappear.
    // This method is called when editing is completed.
    // It must return the new value to be stored in the cell.
    public Object getCellEditorValue() {
         try{
             return txtresult.getText();
         }catch(NullPointerException ne){
              return null;
    private String toolModeModify(){
         Object[] possibilities = {"0", "1", "2","3"};
         String number = (String)JOptionPane.showInputDialog(
                             editingFrame,
                             "Option 0: Receiver\n"
                             + "Option 1: UDT\n"
                             + "Option 2: TRX/UDR\n" +
                             "Option 3: OFF\n",
                             "Select Mode",
                             JOptionPane.PLAIN_MESSAGE,
                             null,
                             possibilities,
                             "0");
         return number;
    private String ModifyCell(){
          String editCell = "Edit Cell Value";
          String s;
          s = JOptionPane.showInputDialog(editingFrame, editCell, null,
                    JOptionPane.PLAIN_MESSAGE);
          if(s != null){
               return s;
          else{
               return null;
}I dont know what I am doing wrong.

JTable cell editor problem

Hi, I have a custom cell editor component being used on my JTable (a calendar component) and am having problems bringing the component out of edit mode when selecting another cell.
If I click on a cell it enters edit mode correctly, the I can drop a popup window out from this editor to display the calendar. If however I move to another cell this window remains active.
Could anyone explain how to come out of edit mode when moving to another cell (not necessarily selecting just moving the mouse in to another) ?
I also have a second problem in that the calendar editor doesn't set the value in to the cell when choosing a date from the component. It keeps the original value that was in the cell. I have implemented a setValueAt() method so I'm not sure why this is not fired, any ideas?? Code is below :
public class DueDateTableModel extends AbstractTableModel {
    private Vector vAllDueDates = null;
    private Connection conn = null;
    private Statement stmt = null;
    private ResultSet rsDueDates = null;
    private int iColCount;
    private String sSqlDueDates = null;
    private String[] testColNames = null;
    public DueDateTableModel(int pColCount, Vector pAllDueDates, String[] pColNames){
        iColCount = pColCount;
        vAllDueDates = pAllDueDates;
        testColNames = pColNames;
        populateTableCells();
        //setupEditors();
    public int getColumnCount() {
        return iColCount;
    public int getRowCount() {
        return vAllDueDates.size();
    public String getColumnName(int iCol) {
          return testColNames[iCol];
    public Object getValueAt(int iRow, int iCol) {
        // TODO Auto-generated method stub
        Vector v = (Vector)vAllDueDates.elementAt(iRow);
        return v.elementAt(iCol);
    public void setValueAt(Object oValue, int iRow, int iCol) {
        Vector v = (Vector)vAllDueDates.elementAt(iRow);
        v.setElementAt(oValue,iCol);
        fireTableCellUpdated(iRow,iCol);
    public boolean isCellEditable(int iRow, int iCol) {
        if(getValueAt(iRow,iCol)==null){
            return false;
        }else{
            return true;
    private class DueDateEditor extends CalendarComboBox implements TableCellEditor{
        //protected EventListenerList listenerList = new EventListenerList();
        //protected ChangeEvent changeEvent = new ChangeEvent(this);
        public DueDateEditor(){
            super();
        public void removeCellEditorListener(CellEditorListener l){
            //listenerList.remove(CellEditorListener.class, l);
        public Component getTableCellEditorComponent(JTable table, Object value
                , boolean isSelected, int row, int column){
            //Just return the input panel and not the panel that the calendar comboBox is on
            return this.inputPanel;
          public Object getCellEditorValue(){
              return this.getDate();
          public boolean isCellEditable(EventObject evt) {
            //if (evt instanceof MouseEvent) {
              // return ((MouseEvent)evt).getClickCount() >= 2;
            return true;
          public boolean shouldSelectCell(EventObject anEvent){
              return false;
          public boolean stopCellEditing(){
              //this.setDate();
              return true;
          public void cancelCellEditing(){
          public void addCellEditorListener(CellEditorListener l){
              //listenerList.add(CellEditorListener.class, l);
          /*protected void fireEditingStopped() {
              CellEditorListener listener;
              Object[] listeners = listenerList.getListenerList();
               for (int i = 0; i < listeners.length; i++) {
                     if (listeners[i] == CellEditorListener.class) {
                            listener = (CellEditorListener) listeners[i + 1];
                            listener.editingStopped(changeEvent);
    }Sorry the classes are quite basic, I'm not very familiar with custom cell editors, I have normally used default ones like combobox etc.
Regards
Alan

To get better help sooner, post a SSCCE that clearly demonstrates your problem.
To post code, use the code tags -- [code]Your Code[/code]will display asYour CodeOr use the code button above the editing area and paste your code between the {code}{code} tags it generates.
luck, db

Problem in JTable with a JComboBox cell editor

Hi gurus,
Please help! I am having a problem with a JTable that has a JComboBox cell editor. When the table is first loaded, the combo box column displays correct data. But whenever I click the combo box, the selection will be set to the first item in the combo box list once the popup menu pops up even before I make any new selection. It is very annoying.
Here is how I set the cell editor:
populateComboBoxModel(); // populate the combo box model.
DefaultCellEditor cell_editor = new DefaultCellEditor(new JComboBox(
combo_model));
contrib_table.getColumnModel().getColumn(1).setCellEditor(
cell_editor);
I didn't set the cell renderer so I assume it is using the default cell renderer.
Thanks !

Not quite. The example doesn't have a different cell editor for each row of the table. I'm sure I must be missing something, bc I've found many references to the fact that this is possible to do. And I have most of it working. However, when I click on any given combobox, it automatically switches to the first value in the list, not the selected item. I've tried setting the selected item all over the code, but it has no effect on this behavior. Also, it only happens the first time I select a given cell. For example, suppose the first row has items A, B, and C, with B being the selected value. The table initially displays with B in this cell, but when I click on B, it switches to A when it brings up the list. If I select B, and move on to some other cell, and then go back and click on B again, it doesn't switch to A.
There seems to be a disconnect between the values that I display initially, and the values that I set as selected in the comboboxes. Either that, or it behaves as though I never set the selected item for the combobox at all.
Any help would be greatly appreciated.

Custom JTable cell editor problem

I have a custom JTable cell editor which is a JPanel with 2 JtextFields, One for a name, the other for a data value. My problem lies in when the the cell is selected and then the user start typing. The JTextfield outline shows up, but there is no carat. I can only edit the cell when I click the mouse in it again. I have my isCellEditable method set to only allow editing on 2 mouse clicks, but I did try it with just returning true and had the same problem. Please help.
Code:
class cellValue {
String name;
String data;
Color nameColor;
Color dataColor;
Font font;
public cellValue(String n, String d, Color nC, Color dC, Font ff){
name = n;
data = d;
nameColor = nC;
dataColor = dC;
font = ff;
} //end class
public class TextFieldCellEditor extends JPanel implements TableCellRenderer, TableCellEditor{
private EventListenerList listenerList = new EventListenerList();
private ChangeEvent event = new ChangeEvent(this);
private cellValue s;
private int e_row=0;
private int e_col=0;
private JTextField ta;
private JTextField tb;
public TextFieldCellEditor() {
setLayout(new GridBagLayout());
ta = new JTextField();
tb = new JTextField();
tb.setHorizontalAlignment(SwingConstants.RIGHT);
add(ta, new GridBagConstraints(0,0,1,1,0.6,0.0,java.awt.GridBagConstraints.WEST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
add(new JLabel(" "),new GridBagConstraints(1,0,1,1,0.1,0.0,java.awt.GridBagConstraints.WEST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
add(tb, new GridBagConstraints(2,0,1,1,0.3,0.0,java.awt.GridBagConstraints.EAST,java.awt.GridBagConstraints.BOTH,new Insets(0,1,0,0),0,0));
} //end init
public Component getTableCellRendererComponent(JTable table, Object value,boolean isSelected,
boolean hasFocus,int row, int column) {
s = (cellValue)value;
e_row = row;
e_col = column;
ta.setText(s.name);
tb.setText(s.data);
ta.setFont(s.font);
tb.setFont(s.font);
ta.setForeground(s.nameColor);
tb.setForeground(s.dataColor);
setForeground(table.getForeground());
setBackground(table.getBackground());
ta.setBackground(table.getBackground());
tb.setBackground(table.getBackground());
ta.setCaretColor(Color.WHITE);
tb.setCaretColor(Color.WHITE);
return (JComponent)(this);
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
return (getTableCellRendererComponent(table, value,isSelected, true, row, column));
public boolean isCellEditable(EventObject e) {
if (e instanceof MouseEvent) {
return ((MouseEvent)e).getClickCount() >= 2;
} return true;
// return true;
public boolean shouldSelectCell(EventObject anEvent) {
return (true);
public void cancelCellEditing() {
public boolean stopCellEditing() {
fireEditingStopped();
return (true);
public Object getCellEditorValue() {
return (ta.getText());
public void addCellEditorListener(CellEditorListener l){
try {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {requestFocus();}
} catch (Exception e) {};
listenerList.add(CellEditorListener.class, l);
public void removeCellEditorListener(CellEditorListener l) {
listenerList.remove(CellEditorListener.class, l);
protected void fireEditingStopped(){
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i -= 2)
((CellEditorListener)listeners[i+1]).editingStopped(event);
protected void fireEditingCanceled() {
Object[] listeners = listenerList.getListenerList();
for (int i = listeners.length - 2; i >= 0; i -= 2)
((CellEditorListener)listeners[i+1]).editingCanceled(event);
} //end class

Thanks again for the repley.
I tried removing the celleditorlistener and using the setSurrenderFocusOnKeystroke, but it did not work. The textfield is editable;
I did change:
public void addCellEditorListener(CellEditorListener l){
try {
SwingUtilities.invokeLater(
new Runnable() {
public void run() {ta.requestFocus();}
} catch (Exception e) {};
listenerList.add(CellEditorListener.class, l);
}This allows the first textfield to request focus and this seems to work. But when I highlight a cell, then start typing, the first character I type puts me into the editor, but it is lost. Example:
I type hello
and get ello in the cell. Then when I press enter the input is excepted and the selection goes to the next cell, but I cannot move the Highlight cursor at all, seems locked. The only way I can continue to the next cell is to use the mouse.
You said you had a cell editor working. Would you care to share as an example. This is killing me to get this to work properly.
Thanks again
Dave

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

Problem in table cell editor

Hai,
I inserted as a dropdownkey in table, Parent node ABc is bind to table , the child node DEf bind to coloumn dropdownbyindex. i set child node singleton as false, but its giving null pointer exception.
IXXXView.IABCNode iu=wdContext.nodeABC();
IXXXView.IDEFElement c=iu.nodeDEF().createDEFElement();
How to Solve this.
Hope Anil and Piyush will help me they already know about this problem.
regards,

Hai Bharadwaj,
happy to see you again, I think I am in wrong with creating table cell editor.
i will say my requirement please help me to do:
in the table the first coloumn is number, second one is name, third one is *** ,this coloumn contains two standard Strings male and female, the can select from dropdown index.
what i did is I created context node parent ABC
in that attributes name , age and another node DEF having attribute S.
I created a table and bind the node ABC(its not allow me to check DEF node).
i deleted table cell editor of column *** and created new editor dropdownindex. and binded texts is node DEF
DEF is set to singleton false.
Give me the suggetion.
regrds,

Problem of JComboBox as cell editor in JTable

Hi,
I use JComboBox as cell editor in JTable. If the drop-down menu of the JComboBox out of the JTable area (as the editable cell is near the bottom of the JTable), the item in JComboBox can not be selected with mouse, in this situation there is no MouseEvent to be received in JTable. But it works when I use the keyboard to choose an item in JComboBox.

Works fine for me.
If you need further help then you will need to provide [url http://www.physci.org/codes/sscce.jsp]Simple Demo Code that demonstrates the problem.

Default cell editor extending problem

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