Jtable Cell Editor
Hi,
I have developed my own JTable and I am quit capable of changing the contents shown in the table.
However, I have one problem : when I edit a cell by standing on it, the numbers I key in will be appended to the existing value. It will not override the value.
For exemple : the cell shows value 121.50. When I try to change it in 221.6, it will append 221.6 after 121.5. Of course, with the backspace I can correct, but it is not very user friendly.
Can anyone help me how to modify the program please?
Hi,
a good approach to that may be to select the hole contents of the JTextField in the moment it gains focus, but to provide this you have to replace the default celleditors - if they are JTextFields - by your one ones, that will react to the focusGained-event in that way. This must be done in each column, where JTextFields are used as celleditors.
greetings Marsian
P.S.: this approach enables the user to correct the value in it as well, if he wants to, instead of allways override it.
Similar Messages
-
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,
PhillipLooks 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. -
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 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 classThanks 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 setteif (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 -
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 cell editor not working
Hello there,
I am new to Java programming,
I am trying to create a check box in a table cell which the user should able manipulate when the JTable is showing, the renderer is working fine but the editor is not , the overriden method getTableCellEditorComponent never gets a call, getTableCellRendererComponent does get a call and renderer works fine.
any ideas whats wrong here ?? or what could be wrong which makes getTableCellEditorComponent not get called ?
my renderere and editor code is like this
package com.itrsgroup.swing.componentmanager.dockablemanager;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.EventObject;
import javax.swing.AbstractCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
* A cell renderer and a cell editor for rendering and editing the filters active state.
public class ActiveCheckBoxRendererEditor extends AbstractCellEditor
implements TableCellEditor, TableCellRenderer, ItemListener
private Font font = new Font("Verdana", Font.BOLD, 11 );
private JCheckBox editor = new JCheckBox("Inactive");
private JCheckBox renderer = new JCheckBox("Inactive");
private String strSelectedText;
private String strNotSelectedText;
private Color colourActive = new Color(51,153,51);
private Color colourInActive = Color.RED;
/** Constructor. */
public ActiveCheckBoxRendererEditor()
this( "Selected", "Not Selected" );
* Constructor.
* @param strSelText - the text to render when selected.
* @param strNotSelText - the text to render when not selected.
public ActiveCheckBoxRendererEditor(String strSelText, String strNotSelText)
strSelectedText = strSelText;
strNotSelectedText = strNotSelText;
renderer = new JCheckBox( strNotSelectedText );
renderer.setHorizontalTextPosition( SwingConstants.CENTER );
renderer.setVerticalTextPosition( SwingConstants.TOP);
renderer.setHorizontalAlignment( SwingConstants.CENTER );
renderer.setVerticalAlignment( SwingConstants.CENTER );
renderer.setFont( font );
editor = new JCheckBox( strNotSelectedText );
editor.setBackground( UIManager.getColor("Table.selectionBackground") );
editor.setHorizontalTextPosition( SwingConstants.CENTER );
editor.setVerticalTextPosition( SwingConstants.TOP );
editor.setHorizontalAlignment( SwingConstants.CENTER );
editor.setVerticalAlignment( SwingConstants.CENTER );
editor.setFont( font );
editor.addItemListener( this );
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
return editor;
@Override
public boolean isCellEditable(EventObject arg0)
// TODO Auto-generated method stub
return true;
@Override
public Object getCellEditorValue()
return editor.isSelected();
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
Boolean bool = (Boolean) value;
renderer.setSelected( bool );
renderer.setText( bool ? strSelectedText : strNotSelectedText);
renderer.setForeground( bool ? colourActive : colourInActive );
if( isSelected )
renderer.setBackground( table.getSelectionBackground() );
else
renderer.setBackground( table.getBackground() );
return renderer;
@Override
public void itemStateChanged(ItemEvent e)
boolean isSelected = e.getStateChange() == ItemEvent.SELECTED;
editor.setText( isSelected ? strSelectedText : strNotSelectedText);
stopCellEditing();
and this is how I install it on my JTable
ActiveCheckBoxRendererEditor cbc = new ActiveCheckBoxRendererEditor("Active", "Inactive");
TableColumn
activeColumn = this.getColumnModel().getColumn( 3 );
activeColumn.setCellEditor( cbc);
activeColumn.setCellRenderer( cbc );
activeColumn.setPreferredWidth( 80 );
activeColumn.setMaxWidth( 200 );
activeColumn.setMinWidth( 80 );thanks
AhmedIs the column editable?
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour. -
How to make JPanel as JTable Cell Editor (Urgent help needed)
Hi!
I want to make JPanel (with a JTextField, 3 JLabels and 1 JTextArea) as cell editor for one column. Can somebody help me on this?
Does anybody have any sample code? I will greatly appreciate ur help.
Thanks,
SnehalOkie. In "How to use JTables" page found in the JAVA website (there is a link from the JTable section of the JAVA API documentation), there is a sample code for a sample color chooser. What this does is, adds a button with its action listener set to pop up a color chooser window. In this, rendering is still through a JLabel.
This example would be of good help to you. Plus, this example gives me a feeling that what u ask is possible. -
HI,
Here trying to populate the ImageIcon using JLabel in Jtable cell. For that I used DefaultCellRenderer. For implement the mouseListener to label I used the DefaultCellEditor. I am facing one problem here. After editing the label I selected the second row of the table, the first row image is not displaying. Can any one help on this issue?
public class LabelCellEditor extends DefaultCellEditor {
public LabelCellEditor(final JCheckBox checkBox) {
super(checkBox);
public Component getTableCellEditorComponent(final JTable table, final Object value,
final boolean isSelected, final int row, final int column) {
Color background = null;
background = ColorManager.SELECTED_ROW_BGCOLOR;
labelVal = (JLabel) value;
labelVal.setOpaque(true);
labelVal.setFont(FontManager.TABLE_DATA_FONT);
labelVal.setBackground(background);
labelPanel = new JPanel();
labelPanel.setOpaque(true);
labelPanel.setBackground(background);
labelPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
labelPanel.setBorder(new EmptyBorder(5, 0, 0, 0));
labelPanel.add(labelVal);
return this.labelPanel;
public Object getCellEditorValue() {
return this.labelPanel;
public class LabelCellRenderer extends DefaultTableCellRenderer {
public LabelCellRenderer(final int alignment) {
//setHorizontalAlignment(alignment);
this.align = alignment;
public Component getTableCellRendererComponent(final JTable table, final Object value,
final boolean isSelected, final boolean hasFocus, final int row, final int column) {
if (value != null) {
if (value instanceof JLabel) {
labelVal = (JLabel) value;
labelVal.setOpaque(true);
labelVal.setFont(FontManager.TABLE_DATA_FONT);
labelVal.setBackground(background);
labelVal.setHorizontalAlignment(this.align);
labelVal.setBorder(new EmptyBorder(0, LRPADD, 0, LRPADD));
JPanel panel = new JPanel();
panel.setOpaque(true);
panel.setBackground(background);
panel.setLayout(new FlowLayout(FlowLayout.LEFT));
panel.setBorder(new EmptyBorder(5, 0, 0, 0));
panel.add(labelVal);
return panel;
return this;
}With more than 30 postings you should know by now how to use the "Code" tags when posting code so the code reatains its original formatting and is therefore more readable.
There is no need to create a custom editor, here is a simple example. -
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) -
I am really stuck with JCheckBox using it as a JTable cell editor...
i need to focus next table cell, when user press a key on JcheckBox used in JTable as a cell editor.
Especially i need to bind "ENTER" key with this action. I tried to addKeyListener do checkbox, tried to add action into input maps of jatble, and also to input map of checkbox. But really nothing works. Please help....
Mathew, HSIGPand yes your code works well with any key, but when i want to assign something to "ENTER", it doesnt work. F.ex. if i assign something to "A" key
like>
InputMap m=table.getInputMap(WHEN_ANCETSTOR...);
m.put(KeyStroke.get("A"),m.get(KeyStroke.get("TAB"));
it works fine, and when i press "a" key it work as a "tab" key in table.
But when i am doing same with "enter" instead of "a" it doesnt work.
btw. there is action "actionselectNextCollumn..." assigned by default to enter
why?? -
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 -
Help!!! JTable cell editor problem...
I am having a problem with table cell editors.
The problem is that when I click on another component
in the frame (out side of the JTable) the cell editors's
stopCellEditing() is not called so I get a JTable with a cell
editor in editing mode.
Any help?
Thanks a lotIt is difficult to tell what happens with FocusEvents when you are actually editing a cell and the editor is "up". I am experiencing different difficulties with the same root issue. I think the problem here is that the Java Focus Manager is consuming the focus event without propagating the event to any of the JTable components (CellEditor or JTable). I am not sure if this is exactly the case but I haven't been able to trap focus events in the Editors, Renderers or JTable anywhere. If the editor is not "up" then event handling seems to be fairly normal but when you are actually editing a cell it becomes tricky.
However, this is a problem I fixed by placing a FocusGained event handler on the other (non JTable) component and then manually stopping editing on the JTable. In other words in the JFrame (or whatever component you are using) I added a FocusListener to the non JTable component and inside of FocusGanied() I execute:
public void focusGained(FocusEvent e){
table.getCellEditor().stopEditing();
table.removeEditor();
You could, of course, use cancelEditing() as well. You'll probably want to wrap the code with some robustness as follows to ensure that you don't get trapped by wierdness.
public void focusGained(FocusEvent e){
if (table.isEditing() && table.getCellEditor() != null){
table.getCellEditor().stopEditing();
table.removeEditor();
This is probably not the only way to solve the problem but it was the way that worked when I encountered that issue. -
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. -
I have a JTable which is displaying 3 columns
One is a ID columns, second is name and third is seniority
Now in seniority there can only be 6 values so I am using a combo box to get the input from the user
However, In ID and Name column I dont understand what to use as a cell editor
In ID I want the input to be only from 0 to 99
while in Name it has to be a name and should not contain numbers....(optional)
please help me out...
thnxIt is difficult to tell what happens with FocusEvents when you are actually editing a cell and the editor is "up". I am experiencing different difficulties with the same root issue. I think the problem here is that the Java Focus Manager is consuming the focus event without propagating the event to any of the JTable components (CellEditor or JTable). I am not sure if this is exactly the case but I haven't been able to trap focus events in the Editors, Renderers or JTable anywhere. If the editor is not "up" then event handling seems to be fairly normal but when you are actually editing a cell it becomes tricky.
However, this is a problem I fixed by placing a FocusGained event handler on the other (non JTable) component and then manually stopping editing on the JTable. In other words in the JFrame (or whatever component you are using) I added a FocusListener to the non JTable component and inside of FocusGanied() I execute:
public void focusGained(FocusEvent e){
table.getCellEditor().stopEditing();
table.removeEditor();
You could, of course, use cancelEditing() as well. You'll probably want to wrap the code with some robustness as follows to ensure that you don't get trapped by wierdness.
public void focusGained(FocusEvent e){
if (table.isEditing() && table.getCellEditor() != null){
table.getCellEditor().stopEditing();
table.removeEditor();
This is probably not the only way to solve the problem but it was the way that worked when I encountered that issue.
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