JTable Ceckbox Editor Change

Hi there,
i have a JTable and want to show some columns for boolean data with icons instead of the standard checkbox. So I wrote a CellRenderer-Class and applied it to the columns. That worked fine, an icon was displayed. But when I want to edit the cell, a textbox-editor comes and there are a lot of compiled-code-errors.
Then I thought it over. The Standard Renderer an the standard Editor for boolean Data is the Checkbox. And the Checkbox can be constructed with an Icon.
So now I think, that I dont need a CellRenderer, but that I could manipulate the checkbox Properties to have Icons displayed. I am not sure now, but possibly I should write my own extension of checkbox.
So: How can I access the standard checkbox properties, to apply an icon to the cells?
Or: How can I make the JTable using my extended Checkbox instead of the standardcheckbox?
Any ideas?
- Frankie

You need to make your own editor. You can get the base code from DefaultTableCellEditor.
In your editor class, instantiate a check box as a model for the editor and configure it the way you want it to appear. You will need a switch-type statement in getTableCellEditorComponent to assign a different icon to your editor -
if(row == 0 && column == 1)
checkbox.setIcon(iconX)
else if(row ==2 && column == 2)
checkbos.setIcon(icony)
and return the checkbox as your editor component
Return the checkbox at the

Similar Messages

PLEASE HELP-JTable cell editor-change one cell, changes all cells of column

for example i have 3 rows 4 columns, column 3 and 4 are dates. now if i change the date to a new value (eg for of column 3)
for any row, and then i click on any other cell. All cell values ie all rows for that column are changed to that new value.
ie it changed column 3 for all rows 1, 2 and 3 to that new value which i changed in only one cell of that column.
PLEASE HELP me , tell me what change i make to the code to fix it ....
this is my cell renderer for date
class DateCellRenderer extends JbcDateTimeChooser implements TableCellRenderer {
protected Border m_noFocusBorder;
public DateCellRenderer() {
    super();
    setStylePattern(JbcDateTimeChooser.MEDIUM);
    m_noFocusBorder = new EmptyBorder(1, 2, 1, 2);
    setOpaque(true);
    setBorder(m_noFocusBorder);
public Component getTableCellRendererComponent(JTable table,
   Object value, boolean isSelected, boolean hasFocus,
   int row, int column)
if(value instanceof Date) {
      Date b = (Date)value;
      setDate(b);
    setFont(table.getFont());
    setBorder(hasFocus ? UIManager.getBorder(
      "Table.focusCellHighlightBorder") : m_noFocusBorder);
    return this;
}I have this custom cell editor date
class DateCellEditor extends AbstractCellEditor implements TableCellEditor {
protected JbcDateTimeChooser editor;
public DateCellEditor() {
    super();
    editor = new JbcDateTimeChooser();
    editor.setStylePattern(JbcDateTimeChooser.MEDIUM);
public Object getCellEditorValue() {
    return editor.getDate();
public Component getTableCellEditorComponent(JTable table,
   Object value, boolean isSelected, int row, int column)
    if(value instanceof Date) {
      editor.setDate((Date)value);
    return editor;
}and this is how i defined in jtable
    lnnTableModel = new CellSiteLNNTableModel();
    lnnTable.setModel(lnnTableModel);
    lnnTableModel.addColumn("ABC");
    lnnTableModel.addColumn("DEF");
    lnnTableModel.addColumn("Date From");
    lnnTableModel.addColumn("Date To");
    for(int k = 0; k < lnnTableModel.getColumnCount(); k++) {
      TableColumn col = lnnTable.getColumn(lnnTableModel.getColumnName(k));
      TableCellRenderer renderer;
        DefaultTableCellRenderer textRenderer = new DefaultTableCellRenderer();
        renderer = textRenderer;
      TableCellEditor editor;
      JTextField textColumn = new JTextField();
      if((k == CellSiteLNN.DATE_FROM) || (k == CellSiteLNN.DATE_TO)) {
        editor = new DateCellEditor(); // this is the cell editor
     renderer = new DateCellRenderer(); // this is the assigned cell renderer
      } else {
        editor = new DefaultCellEditor(textColumn);
      col.setCellRenderer(renderer);
      col.setCellEditor(editor);
    }

table model is extended from AbstractTableModel
and have these methods
do you see anything wrong here.....
public Object getValueAt(int row, int column) {
    Vector rowVector = (Vector)dataVector.elementAt(row);
    return rowVector.elementAt(column);
public void setValueAt(Object aValue, int row, int column) {
    Vector rowVector = (Vector)dataVector.elementAt(row);
    rowVector.setElementAt(aValue, column);
    // generate notification
    fireTableChanged(new TableModelEvent(this, row, row, column));
} // end method (setValueAt)

JTable Combobox editor with PrppertychangeListener

Hello,
I need a help from experts.
I have a JTable. In the java table i need to have a ComboBox editor for example on the second column. And when i am changing value in the combobox i need to to do some calculations in JTable object.
To setup a PropertyChangeListener on combo object is not what i want, because i can not make calcultions inside JTable.
I need ComboBox based editor for JTable with property change listener.
Can anybody point me to some example o sugest something?
Thanks a lot

Sollution
package kelias.table.editor;
import javax.swing.DefaultCellEditor;
import javax.swing.JTable;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.Component;
import kelias.ComboBox.MyDBComboBox;
Implements a cell editor that uses a formatted text field
to edit Integer values.
public class CarJobEditor extends DefaultCellEditor implements ItemListener
MyDBComboBox comboJobs;
//Darbo kiekis
String jobQuantity=new String();
//Lentel�
JTable tableTmp;
//Einamoji eilut�
int rowTmp;
int jobQColNumber;
int resultColIndex;
public CarJobEditor(int jobQColNumber,int resultColIndex)
super(new MyDBComboBox());
this.jobQColNumber=jobQColNumber;
this.resultColIndex=resultColIndex;
comboJobs = (MyDBComboBox) getComponent();
comboJobs.loadData(kelias.db.DBStrings.selectJobsForCombo());
comboJobs.addItemListener(this);
//Override to invoke setValue on the formatted text field.
public Component getTableCellEditorComponent(JTable table,Object value, boolean isSelected,int row, int column)
     jobQuantity=(String)table.getValueAt(row,jobQColNumber);
     this.tableTmp=table;
     this.rowTmp=row;
MyDBComboBox tmp = (MyDBComboBox)super.getTableCellEditorComponent(table, value, isSelected, row, column);
tmp.setSelectedItem(value);
return tmp;
public void itemStateChanged(ItemEvent event)
     if(event.getStateChange() == ItemEvent.SELECTED)
          if (!this.jobQuantity.equals(""))
               float price=kelias.db.DBGetData.selectJobPricePM(comboJobs.getSelectedItem());
               float quantity=Float.parseFloat((String)jobQuantity);
               float f = (float) (Math.round(price*quantity*100.0f)/100.0f);
               tableTmp.setValueAt(f,rowTmp,resultColIndex);
}

Tab transversal while using JTextArea as a JTable cell editor..

I'm working on a project that will use a JTable with a JTextArea cell editor to create a chart for classroom scheduling. Searching on Google, I found a way to use a JTextArea as a cell editor and render the cell properly. However, when editing a cell, pressing the Tab key inserts a tab, rather than leaving the cell and going to the next one, as happens with just a regular JTable. In fact, none of the keyboard shortcuts that work on a JTable work once the JTextArea cell editor is used. Does anyone know of any way to resolve this? Below is some code I'm using to create a sample GUI, just to verify that I can do this. Another question is would it be easier to use a bunch of JLabels and JTextAreas, remove the padding from those JTextAreas, and try to allow for Tab transversals between stand-alone JTextAreas, rather than JTextAreas as JTable cell editors?
Thanks!
package edu.elon.table;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
public class GUI
     private JFrame frame;
     private String[] columnNames = {"Classroom", "8:00-9:10", "9:25-10:35",
          "10:50-12:00", "12:15-1:25", "1:40-2:50", "1:40-3:20 (MW)",
          "3:35-5:15 (MW)", "5:30-7:10 (MW)"};
     private Object[][] data = {columnNames,
          {"ALAM 201 (42)\nENG 110 LAB", "", "", "", "", "", "", "", ""},
          {"ALAM 202 (42)\nDP/DVD", "", "", "", "", "", "", "", ""},
          {"ALAM 203 (38)\nDP/DVD", "", "", "", "", "", "", "", ""},
          {"ALAM 205 (40)\n", "", "", "", "", "", "", "", ""},
          {"ALAM 206 (39)\nSINK, TV/VCR", "", "", "", "", "", "", "", ""},
          {"ALAM 207 (40+)\nDP/DVD", "", "", "", "", "", "", "", ""},
          {"ALAM 214 (38)\nTV/VCR", "", "", "", "", "", "", "", ""},
          {"ALAM 215 (42)\nTV/VCR", "", "", "", "", "", "", "", ""},
          {"ALAM 216 (42)\n", "", "", "", "", "", "", "", ""},
          {"ALAM 301 (40)\nTV/VCR", "", "", "", "", "", "", "", ""},
          {"ALAM 302 (38)\nDP/DVD", "", "", "", "", "", "", "", ""},
          {"ALAM 304 (35)\nFRENCH", "", "", "", "", "", "", "", ""},
          {"ALAM 314 (30)\nDP, PSY, COMPUTER ASSISTED", "", "", "", "", "", "",
          {"ALAM 315 (40)\nPC LAB, DP/DVD", "", "", "", "", "", "", "", ""}};
     private JTable table;
     public GUI()
          frame = new JFrame();
          table = new JTable(data, columnNames);
          table.setRowHeight(table.getRowHeight()*2);
          TableColumnModel cModel = table.getColumnModel();
          TextAreaRenderer renderer = new TextAreaRenderer();
          TextAreaEditor editor = new TextAreaEditor();
          for (int i = 0; i < cModel.getColumnCount(); i++)
               cModel.getColumn(i).setCellRenderer(renderer);
               cModel.getColumn(i).setCellEditor(editor);
          frame.setLayout(new GridLayout(1,0));
          frame.add(table);
          frame.pack();
          frame.setVisible(true);
public static void main (String[] args)
GUI gui = new gui();
* Written by Dr. Heinz Kabutz, found through online newsletter via Google.
class TextAreaRenderer extends JTextArea
implements TableCellRenderer {
private final DefaultTableCellRenderer adaptee =
new DefaultTableCellRenderer();
/** map from table to map of rows to map of column heights */
private final Map cellSizes = new HashMap();
public TextAreaRenderer() {
setLineWrap(true);
setWrapStyleWord(true);
public Component getTableCellRendererComponent(//
JTable table, Object obj, boolean isSelected,
boolean hasFocus, int row, int column) {
// set the colours, etc. using the standard for that platform
adaptee.getTableCellRendererComponent(table, obj,
isSelected, hasFocus, row, column);
setForeground(adaptee.getForeground());
setBackground(adaptee.getBackground());
setBorder(adaptee.getBorder());
setFont(adaptee.getFont());
setText(adaptee.getText());
// This line was very important to get it working with JDK1.4
TableColumnModel columnModel = table.getColumnModel();
setSize(columnModel.getColumn(column).getWidth(), 100000);
int height_wanted = (int) getPreferredSize().getHeight();
addSize(table, row, column, height_wanted);
height_wanted = findTotalMaximumRowSize(table, row);
if (height_wanted != table.getRowHeight(row)) {
table.setRowHeight(row, height_wanted);
return this;
private void addSize(JTable table, int row, int column,
int height) {
Map rows = (Map) cellSizes.get(table);
if (rows == null) {
cellSizes.put(table, rows = new HashMap());
Map rowheights = (Map) rows.get(new Integer(row));
if (rowheights == null) {
rows.put(new Integer(row), rowheights = new HashMap());
rowheights.put(new Integer(column), new Integer(height));
* Look through all columns and get the renderer. If it is
* also a TextAreaRenderer, we look at the maximum height in
* its hash table for this row.
private int findTotalMaximumRowSize(JTable table, int row) {
int maximum_height = 0;
Enumeration columns = table.getColumnModel().getColumns();
while (columns.hasMoreElements()) {
TableColumn tc = (TableColumn) columns.nextElement();
TableCellRenderer cellRenderer = tc.getCellRenderer();
if (cellRenderer instanceof TextAreaRenderer) {
TextAreaRenderer tar = (TextAreaRenderer) cellRenderer;
maximum_height = Math.max(maximum_height,
tar.findMaximumRowSize(table, row));
return maximum_height;
private int findMaximumRowSize(JTable table, int row) {
Map rows = (Map) cellSizes.get(table);
if (rows == null) return 0;
Map rowheights = (Map) rows.get(new Integer(row));
if (rowheights == null) return 0;
int maximum_height = 0;
for (Iterator it = rowheights.entrySet().iterator();
it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
int cellHeight = ((Integer) entry.getValue()).intValue();
maximum_height = Math.max(maximum_height, cellHeight);
return maximum_height;
* Written by Dr. Heinz Kabutz, found through online newsletter via Google.
class TextAreaEditor extends DefaultCellEditor
public TextAreaEditor() {
     super(new JTextField());
final JTextArea textArea = new JTextArea();
textArea.setWrapStyleWord(true);
textArea.setLineWrap(true);
JScrollPane scrollPane = new JScrollPane(textArea);
scrollPane.setBorder(null);
editorComponent = scrollPane;
delegate = new DefaultCellEditor.EditorDelegate() {
public void setValue(Object value)
textArea.setText((value != null) ? value.toString() : "");
public Object getCellEditorValue()
return textArea.getText();
}

Using the KeyEvent manager and playing around with the JTextArea, I was able to get a JTable using JTextAreas as the cell editors that worked very close to the way the regular JTable works. You have to hit Tab twice to shift focus to another cell, or hit Tab once and then an arrow key. Also, Alt-Enter will allow you to enter a cell for editing. All of the changes were made to the TextAreaEditor class, which should now read as follows:
class TextAreaEditor extends DefaultCellEditor implements KeyListener
     private int lastKeyCode;
     public TextAreaEditor(final JTable table) {
          super(new JTextField());
          lastKeyCode = KeyEvent.CTRL_DOWN_MASK;
          final JTextArea textArea = new JTextArea();
          textArea.setWrapStyleWord(true);
          textArea.setLineWrap(true);
          textArea.addKeyListener(this);
          textArea.setFocusable(true);
          textArea.setFocusAccelerator((char) KeyEvent.VK_ENTER);
          JScrollPane scrollPane = new JScrollPane(textArea);
          scrollPane.setBorder(null);
          scrollPane.setFocusable(false);
          editorComponent = scrollPane;
          delegate = new DefaultCellEditor.EditorDelegate() {
               public void setValue(Object value) {
                    textArea.setText((value != null) ? value.toString() : "");
               public Object getCellEditorValue() {
                    return textArea.getText();
     public void keyTyped(KeyEvent ke)
          // TODO Auto-generated method stub
     public void keyPressed(KeyEvent ke)
          if (ke.getKeyCode() == KeyEvent.VK_TAB)
               ke.consume();
               KeyboardFocusManager.getCurrentKeyboardFocusManager()
                         .focusNextComponent();
               return;
          if (ke.getKeyCode() == KeyEvent.VK_TAB && ke.isShiftDown())
               ke.consume();
               KeyboardFocusManager.getCurrentKeyboardFocusManager()
                         .focusPreviousComponent();
               return;
          if ((lastKeyCode == KeyEvent.CTRL_DOWN_MASK) &&
                    (ke.getKeyCode() == KeyEvent.VK_ENTER))
               ke.consume();
               editorComponent.requestFocus();
          else
               lastKeyCode = ke.getKeyCode();
     public void keyReleased(KeyEvent ke)
          // TODO Auto-generated method stub
     }

JPanel as a JTable Cell Editor

I want to use a JPanel and as a JTable Cell Editor. The JPanel consists of a JTextField and a JButton. When I bring it up as an editor all works fine until I change the text field value and click on another line causing the editor to be stopped. Then my app seems to go into a processing frenzy which effectively stop me from doing anything else (the app has trouble repainting itself as well).
I'm assuming I'm not passing an important message from the JPanel to the text field but am not sure. Has anyone had success in doing this? What am I missing?
Thanks in advance,
Phillip

Looks like I was too quick off the draw in posting this.
My problem was due to some old "expiremental" code that was processing key binding.
Once I removed the unnecessary code all worked well.

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

How to listen a JTable cell is changed?

is it have any Listener can know the JTable cell cursor change to other?
Thanks!

JTable exposes a ListSelectionModel through getSelectionModel() that you can listen to for changes in the selected row. I think you need to get the TableColumnModel to detect changes in the selected column:
table.getSelectionModel().addSelectionListener(selectionListener);
table.getColumnModel().getSelectionModel().addSelectionListener(selectionListener);selectionListener should get notified if a change is made to the selected row or column.
Hope this helps.

Jtable on cell changed event

How can i treat an Jtable on cell changed event, not on value changed

Do you mean cell selection changed? One way is to add a ListSelectionListener to both the table's and the table's ColumnModel's ListSelectionModels. Something likeListSelectionListener lsl = new ListSelectionListener() {
   public void valueChanged(ListSelectionEvent e) {
      System.out.println(e.getSource());
      ListSelectionModel lsm = (ListSelectionModel) e.getSource();
      if (!lsm.getValueIsAdjusting()) {
         System.out.println("Selection changed");
table.getSelectionModel().addListSelectionListener(lsl);
table.getColumnModel().getSelectionModel().addListSelectionListener(lsl);Note that simultaneous change of both row and column will generate two valueChanged events.
If that's not what you wanted to know, ask a better question.
[http://catb.org/~esr/faqs/smart-questions.html]
db

AutoComplete JComboBox As JTable cell editor

Hello, when I try to use AutoComplete JComboBox as my JTable cell editor, I facing the following problem
1) Exception thrown when show pop up. - Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
2) Unable to capture enter key event.
Here is my complete working code. With the same JComboBox class, I face no problem in adding it at JFrame. But when using it as JTable cell editor, I will have the mentioned problem.
Any advice? Thanks
import javax.swing.*;
import javax.swing.JTable.*;
import javax.swing.table.*;
import java.awt.event.*;
* @author yccheok
public class NewJFrame extends javax.swing.JFrame {
    /** Creates new form NewJFrame */
    public NewJFrame() {
        initComponents();
                /* Combo Box Added In JFrame. Work as expected. */
                final JComboBox comboBox = new JComboBox();
                comboBox.addItem("Snowboarding");
                comboBox.addItem("Rowing");
                comboBox.addItem("Chasing toddlers");
                comboBox.setEditable(true);
                comboBox.getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
                   public void keyReleased(KeyEvent e) {
                       if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                           System.out.println("is enter");
                           return;
                       System.out.println("typed");
                       comboBox.setSelectedIndex(0);
                       comboBox.showPopup();
                getContentPane().add(comboBox, java.awt.BorderLayout.SOUTH);
    public JTable getMyTable() {
        return new JTable() {
             Combo Box Added In JTable as cell editor. Didn't work as expected:
             1. Exception thrown when show pop up.
             2. Unable to capture enter key event.
            public TableCellEditor getCellEditor(int row, int column) {
                final JComboBox comboBox = new JComboBox();
                comboBox.addItem("Snowboarding");
                comboBox.addItem("Rowing");
                comboBox.addItem("Chasing toddlers");
                comboBox.setEditable(true);
                comboBox.getEditor().getEditorComponent().addKeyListener(new KeyAdapter() {
                   public void keyReleased(KeyEvent e) {
                       if(e.getKeyCode() == KeyEvent.VK_ENTER) {
                           System.out.println("is enter");
                           return;
                       System.out.println("typed");
                       comboBox.setSelectedIndex(0);
                       comboBox.showPopup();
                return new DefaultCellEditor(comboBox);
    /** 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() {
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = getMyTable();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null},
                {null, null, null, null}
            new String [] {
                "Title 1", "Title 2", "Title 3", "Title 4"
        jScrollPane1.setViewportView(jTable1);
        getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
        pack();
    }// </editor-fold>
     * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
    // Variables declaration - do not modify
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    // End of variables declaration
}

You need to create a custom CellEditor which will prevent these problems from occurring. The explanation behind the problem and source code for the new editor can be found at Thomas Bierhance's site http://www.orbital-computer.de/JComboBox/. The description of the problem and the workaround are at the bottom of the page.

Custom JTable cell editors and persistence

I have a JTable with an underlying data model (an extension of AbstractTableModel) that uses custom cell editors in the last column. The cell editor in that column, for a given row, depends on the value selected in another column of the same row. The cell editors include text, date, list, and tree editors (the last one in a separate dialogue). The number of rows is changeable.
I have need to persist the data for a populated table from time to time, for restoration later on. I've achieved that, such that the data model is recreated, the table appears correct, and the appropriate cell editors activated (by creating new instances of the editors' classes).
However, my problem is that the (custom) cell editors do not reflect the data in the model when editing mode is begun the first time after restoration. Eg. the text editor is always empty, the list editor shows the first item, and no node is selected in the tree editor.
If I've restored the model correctly, should the editors properly reflect the underlying data when they are set to editing mode?
I suspected not, and thus tried to explicitly 'set' the correct values immediately after each editor is recreated ... but to no avail.
Does anyone have any thoughts, or experience with something similar? I'm happy to supply code.

You can use html tags within Swing, so I think you can do the following:
* MyRenderer.java
* Created on 26 April 2007, 10:27
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package newpackage;
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.TableCellRenderer;
* @author CS781RJ
public class MyRenderer extends JLabel implements TableCellRenderer
    public MyRenderer()
        setHorizontalTextPosition(SwingConstants.RIGHT);
        setIconTextGap(3);
        setOpaque(true);
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean cellHasFocus, int row, int column)
        if (isSelected)
            setBackground(table.getSelectionBackground());
            setForeground(table.getSelectionForeground());
        else
            setBackground(table.getBackground());
            setForeground(table.getForeground());
        if (value instanceof String)
            if ((value != null) && (value.toString().length() > 0))
                System.out.println("Value: " + value.toString());
                setFont(new java.awt.Font("Tahoma", 0, 11));
                setText("<html>" + value.toString().replaceAll("\n", "<br>") + "</html>");
        return this;
}In the class that has the JTable, use the code AFTER declaring the values, columns, etc:
jTable1.getColumnModel().getColumn(0).setCellRenderer(new MyRenderer());
jTable1.setValueAt("Riz\nJavaid", 0, 0);One thing I haven't done is to resize the cell heights, make sure this is done.
Hope this helps
Riz

JTable - different editor for each cell?

I have a JTable where two columns have combo box editors. When the user makes a selection in one combo box, the other combo box's options must change, as its allowable options depend on selection in the other combo box.
So in short, I need a way of changing the combo box options for ONLY a specific cell, NOT the entire column. I currently only know how to do this for a whole column:
// first put stuff in myComboBox, and then...
myJTable.getColumnModel().getColumn().setCellEditor( new DefaultCellEditor( myComboBox ) );
Is there any way to change the values in the combo box of a specific cell, rather than the entire column?
I apologize if this is a newbish question... I am fairly new to Swing, but I didn't see anything addressing this in the documentation.
-Vern

The solution is like the one I gave you in one of
your previous postings. In that posting you wanted a
renderer for a specific cell. In this posting you
want a editor for a specific cell. The solution is
the same, only the method name changes.Okay, thanks. Sorry if it seems like I'm a slow learner. ;-)
-Vern

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 For Decimal Input

Hi friends in my program i am using jtable, in that table two columns are decimal value. I am using defaultcelleditor for to check the user input but it does not work. so how can i check the user input, ie number or string using the cell editor. My aim is to check the user input, if the user give the wrong value, ie string input the warning message want to be displayed and the editor color also want to change. Please help me.
I refer some tutorials and get some source code and i used but it does not work. this is the code.
DecimalFormat format=new DecimalFormat("######0.00");
tableField=new JFormattedTextField();
tab_Bill.getColumnModel().getColumn(3).setCellRenderer(new DecimalRenderer(format)); tab_Bill.getColumnModel().getColumn(3).setCellEditor(new ProblemEditor(tableField));
class DecimalRenderer extends DefaultTableCellRenderer {
DecimalFormat formatter;
DecimalRenderer(String pattern) {
    this(new DecimalFormat(pattern));
DecimalRenderer(DecimalFormat formatter) {
    this.formatter = formatter;
    setHorizontalAlignment(JLabel.RIGHT);
    @Override
public void setValue(Object value) {
   /* setText((value == null) ? "" : formatter.format(((Double) value)
        .doubleValue()));*/
setText((value == null) ? "" : formatter.format(Double.parseDouble(value.toString())));
     class ProblemEditor extends DefaultCellEditor implements TableCellEditor{
   private JFormattedTextField ftf;
   public ProblemEditor(JFormattedTextField myfield) {
       super(myfield);
        @Override
   public Component getTableCellEditorComponent(JTable table,
           Object value, boolean isSelected, int row, int column) {
       ftf = (JFormattedTextField) super.getTableCellEditorComponent(table, value, isSelected, row, column);
        Double d = null;
       try
                if(value!=null)
        d=Double.parseDouble(value.toString());
        catch(Exception e)
           // JOptionPane.showMessageDialog(null,"Wrong");
           d=0.0;
       ftf.setValue(d); // remove and okay
       ftf.setCaretPosition(ftf.getText().length());
       return ftf;
}

You might find it easer to use on of the [Table Format Renderers|http://www.camick.com/java/blog.html?name=table-format-renderers].

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 Focus Change

Hi all,
Is it possible to keep track the cell focus change in JTable so that I can perform appropriate validation. For example, user use the key to move from cell (2,3) to (2,4) or use the mouse to move from (2,4) to (5,3).
I know that it is possible to use ListSelectionEvent on SelectionModel (for row change) and & ColumnModel (for change change) to do that. However, when both row & column change simultaneously, I need to do only 1 validation (in fact, the validation must have both information). My existing code gives me two separate event instead.
Any idea ? Thanks in advance.

This will be a decently hard nut to crack without making a slightly (or worse) cluttered solution.
I've been part of a framework where applications-developer has requested solutions like you currently ask for. The solution we implemented was twofold.
1) We made an centralised TableModel that people could use as-is or extend if nessecary. To this tablemodel we added a new set of events that could be consumed, or in some cases even replaced.
The events was for instance 'beforeCellChange' and contained enough data on the current value, the new value, location in model and space for replacing any of the above values. Many more events was added as time went by as well.
We made the event-listener fairly generalized and the type sent in the actual event, this allowed us to expand the events without having to change any interfaces. The drawback with this was that it forces the developer to check which type of event is happening, a bit like events happened in AWT 1.0.
With the help of this, the developers just added the nessecary listeners to the table model and they could consume, change, validate any input to a table before it was committed.
2) No good method for row-verification could really be found.
There was a few futile tries, but since data could be entered in any order, the validation raised the amount of code with a order of magnitude. It does work, by listening on selection events, but quite a few extra checks has to be resolved, as instance with rows not validated etc etc.
My recomendations, verify data carefully from events either from model or the table-editor. The result will most assurdly end in that you need to have an tablemodel on your own and also TableCellRenderer to accomplish all that you want to do.
Yours sincerely
Peter Norell

JTable Ceckbox Editor Change

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