JTable cell only numerical

Hello,
it`s possible in cell of a JTabel th context only numerical or letters. Is there any function for this?
Thanks for any answer or tip!!!

JTable can use custom editors: see the tutorial, and particularly:
+ [url http://java.sun.com/docs/books/tutorial/uiswing/components/table.html]How to Use Tables
|---...
|--- [url http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#validtext]Using an Editor to Validate User-Entered Text
|---...
|--- [url http://java.sun.com/docs/books/tutorial/uiswing/components/formattedtextfield.html]How to Use Formatted Text Fields
|---...

Similar Messages

Update jtable cell via numeric keypad

Hi,
I have a problem, trying to figure out how to input numbers in a jtextfield in a jtable cell, from a group of jbuttons (rendered as a numeric keypad). I can get the cell to focus, but when I click on one of the jbuttons in the keypad, the cell loses focus and nothing is printed. I can update the cell by directly typing from the keyboard; that works fine. But I'm lost when trying to do it from the touch-screen keypad. Can anyone point me in the right direction. I assume I need to attach additional listeners somewhere.
Thanks in-advance.
Lee

I can get the cell to focus, Then the code for you button would need to be something like:
String text = (String)table.getValueAt(...);
String updated = text + button.getText();
table.setValueAt(updated, ...);

Insert only one character in a JTable cell

Hi1
Can anybody tell me how i can do in order to insert only one character in a JTable cell? For example, i'ld like that user inserts only
a and not abcd in a JTable cell... can anyone halp me?
Thanks

Have you tried
table.getColumn(0).setCellEditor(new DefaultCellEditor(new JFormattedTextField("[A-Z]")));
I haven't tried it. You might look at some of these.
http://search.java.sun.com/search/java/index.jsp?qp=&nh=10&qt=%2B%22new+defaultcelleditor%22+%2B%22new+jformattedtextfield%22&col=javaforums&x=39&y=17

How to select rows in the inner JTable rendered in an outer JTable cell

I have wrriten the following code for creating cell specific renderer - JTable rendered in a cell of a JTable.
table=new JTable(data,columnNames)
public TableCellRenderer getCellRenderer(int row, int column)
if ((row == 0) && (column == 0))
return new ColorRenderer();
else if((row == 1) && (column == 0))
return new ColorRenderer1();
else
return super.getCellRenderer(row, column);
ColorRenderer and ColorRenderer1 are two inner classes, which implement TableCellRenderer to draw inner JTable on the outer JTable cell, having 2 rows and 1 column each.
Now what is happening the above code keeps executing continously, that is the classes are being initialised continously, inner JTables are rendered (drawn) continously, and this makes the application slow after some time. It throws java.lang.OutOfMemoryException.
WHY IS IT SO??? I can't understand where's the bug..
Any advice please???
Moreover i want selections in inner tables and not on outer table, how can this be possible.
I am working on this since a long time but have not yet found a way out...

With your help i have overcome the problem of continous repeatition.
The major problem which I am facing is, in selecting rows in the inner rendered JTables.
I have added listener on outer JTable which select rows on the outer JTable, hence the complete inner JTable which being treated as a row, gets selected.
The thing is i need to select the rows of inner rendered JTables,not the outer JTable.
How to go about it??
I have even added listener to inner rendered JTables, but only first row of every table gets selected.
Please help....
Thanks in advance.

Problem in JTable cell renderer

Hi
One problem in JTable cell. Actually I am using two tables while I am writing renderer for word raping in first table .. but it is affected in last column only remain is not being effected�. Please chaek it out what is exact I am missing�
Thanks
package com.apsiva.tryrowmerge;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.EventObject;
import java.util.Hashtable;
import java.net.*;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
class Item_Details extends JFrame {
    ApsJTable itemTable = null;
     ApsJTable imageTable = null;
     ArrayList data = new ArrayList();
     String[] columns = new String[2];
     ArrayList data1 = new ArrayList();
     String[] columns1 = new String[2];
     ItemTableModel itemTableModel = null;
     ItemTableModel itemTableModel1 = null;
     public Item_Details()
          super("Item Details");
         this.setSize(600,100);
         this.setBackground(Color.WHITE);
          this.setVisible(true);
         init();
     private void init(){
          ////////////// Get data for first Table Model ////////////////////////////
          data = getRowData();
          columns = getColData();
          System.out.println(columns[0]);
         itemTableModel = new ItemTableModel(data,columns);
         /////////////Get Data for Second Table Model //////////////////////////////
          try{
                    data1 = getRowData1();
             }catch(Exception e){}
          columns1 = getColumns1();
         itemTableModel1 = new ItemTableModel(data1,columns1);
         ///////////// Set Data In Both Table Model //////////////////////////////////
          itemTable = new ApsJTable(itemTableModel);
          imageTable = new ApsJTable(itemTableModel1);
          this.itemTable.setShowGrid(false);
          this.imageTable.setShowGrid(false);
          this.itemTable.setColumnSelectionAllowed(false);
          this.imageTable.setColumnSelectionAllowed(false);
          System.out.println(itemTable.getColumnCount());
          this.imageTable.setRowHeight(getImageHeight()+3);
          JScrollPane tableScrollPane = new JScrollPane(this.imageTable,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
          tableScrollPane.setRowHeaderView(this.itemTable);
          //itemTable.getColumnModel().getColumn(0).setMaxWidth(200);
          itemTable.getColumnModel().getColumn(0).setPreferredWidth(200);
          itemTable.getColumnModel().getColumn(1).setPreferredWidth(600);
          tableScrollPane.getRowHeader().setPreferredSize(new Dimension(800, 0));
          itemTable.getTableHeader().setResizingAllowed(false);
          itemTable.getTableHeader().setReorderingAllowed(false);
          itemTable.setColumnSelectionAllowed(false);
          //itemTable.setRowHeight(25);
          itemTable.setCellSelectionEnabled(false);
          itemTable.setFocusable(false);
          imageTable.getTableHeader().setReorderingAllowed(false);
          imageTable.setFocusable(false);
          imageTable.setCellSelectionEnabled(false);
          //tableScrollPane.setOpaque(false);
          itemTable.setAutoCreateColumnsFromModel(false);
          int columnCount = itemTable.getColumnCount();
          for(int k=0;k<columnCount;k++)
               TableCellRenderer renderer = null;
               TableCellEditor editor = null;
               renderer = new TextAreaCellRenderer();     // NEW
          //     editor = new TextAreaCellEditor();
          //     TableColumn column = new TableColumn(k,itemTable.getColumnModel().getColumn(k).getWidth(),renderer, editor);
               System.out.println(k);
               itemTable.getColumnModel().getColumn(k).setCellRenderer(renderer);
               //itemTable.getColumnModel().getColumn(k).setCellEditor(editor);
               /*itemTable.getColumnModel().getColumn(1).setCellRenderer(new TextAreaCellRenderer());
               itemTable.getColumnModel().getColumn(1).setCellEditor(new TextAreaCellEditor());*/
//               itemTable.setShowGrid(false);
               //itemTable.addColumn(column);
               //itemTable.getColumnModel().getColumn(k).setCellRenderer(new MultiLineCellRenderer());
               //itemTable.getColumnModel().getColumn(k).setCellEditor(new TextAreaCellEditor());
////////////---------------------- Here background color is being set--------------//////////////////
          this.imageTable.getParent().setBackground(Color.WHITE);
          this.itemTable.getParent().setBackground(Color.WHITE);
          tableScrollPane.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER,this.itemTable.getTableHeader());
          getContentPane().add(tableScrollPane,BorderLayout.CENTER);
          getContentPane().setVisible(true);
     public static void main(String[] str){
          com.incors.plaf.alloy.AlloyLookAndFeel.setProperty("alloy.licenseCode", "2005/05/28#[email protected]#1v2pej6#1986ew");
          try {
            javax.swing.LookAndFeel alloyLnF = new com.incors.plaf.alloy.AlloyLookAndFeel();
            javax.swing.UIManager.setLookAndFeel(alloyLnF);
          } catch (javax.swing.UnsupportedLookAndFeelException ex) {
          ex.printStackTrace();
          Item_Details ID = new Item_Details();
          ID.setVisible(true);
public ArrayList getRowData()
     ArrayList rowData=new ArrayList();
     Hashtable item = new Hashtable();
     item.put(new Long(0),new String("Item No:aaaaaaa aaaaaaaa aaaaaaaaa aaaaaa"));
     item.put(new Long(1),new String("RED-1050"));
     rowData.add(0,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Description:rt r trtrt rttrytrr tytry trytry tr tr rty thyjyhjhnhnhgg hhjhgjh"));
     item.put(new Long(1),new String("SYSTEM 18 mbh COOLING 13 mbh HEATING 230/208 v POWER AIRE "));
     rowData.add(1,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Stage:"));
     item.put(new Long(1),new String("Draft"));
     rowData.add(2,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Price: "));
     item.put(new Long(1),new String("999.00"));
     rowData.add(3,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(4,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(5,item);
     item = new Hashtable();
     item.put(new Long(0),new String("Features:"));
     item.put(new Long(1),new String("SYSTEM COOLING & HEATING 12 mbh 230/208 v POWER AIRE SYSTEM1234 COOLING & HEATING 12 mbh 230/208 v POWER AIRE "));
     rowData.add(6,item);
     /*item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(5,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(6,item);
     item.put(new Long(0),new String("Family Sequence"));
     item.put(new Long(1),new String("8.00"));
     rowData.add(7,item);
     return rowData;
public String[] getColData()
     String[] colData = new String[]{"Attribute","Value"};
     return colData;
public ArrayList getRowData1()throws MalformedURLException{
     ArrayList rowData = new ArrayList();
     Hashtable item = new Hashtable();
     String str = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
     URL url = new URL(str);
     ImageIcon ic = new ImageIcon(url);
     ImageIcon scaledImage = new ImageIcon(ic.getImage().getScaledInstance(getImageHeight(), -1,Image.SCALE_SMOOTH));
     item.put(new Long(0), scaledImage);
     rowData.add(0,item);
     String str1 = new String("http://biis:8080/assets/PRIMPRIM/Adj_BeacM_Small.jpg");
     URL url1 = new URL(str1);
     ImageIcon ic1 = new ImageIcon(url1);
     ImageIcon scaledImage1 = new ImageIcon(ic1.getImage().getScaledInstance(120, -1,Image.SCALE_DEFAULT));
     item.put(new Long(0),scaledImage1);
     rowData.add(1,item);
     return rowData;
public String[] getColumns1(){
     String[] colData = new String[]{"Image"};
     return colData;
public int getImageHeight(){
     ImageIcon ic = new ImageIcon("c:\\image\\ImageNotFound.gif");
     return ic.getIconHeight();
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer
     public TextAreaCellRenderer() {
          setEditable(false);
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(JTable table,
          Object value, boolean isSelected, boolean hasFocus,
          int nRow, int nCol)
          if (value instanceof String)
               setText((String)value);
          // Adjust row's height
          int width = table.getColumnModel().getColumn(nCol).getWidth();
          setSize(width, 1000);
          int rowHeight = getPreferredSize().height;
          if (table.getRowHeight(nRow) != rowHeight)
               table.setRowHeight(nRow, rowHeight);
          this.setBackground(Color.WHITE);
          return this;

I think Problem is between these code only
for(int k=0;k<columnCount;k++)
               TableCellRenderer renderer = null;
               TableCellEditor editor = null;
               renderer = new TextAreaCellRenderer();
                                                            itemTable.getColumnModel().getColumn(k).setCellRenderer(renderer);or in this renderer
class TextAreaCellRenderer extends JTextArea implements TableCellRenderer
     public TextAreaCellRenderer() {
          setEditable(false);
          setLineWrap(true);
          setWrapStyleWord(true);
     public Component getTableCellRendererComponent(JTable table,
          Object value, boolean isSelected, boolean hasFocus,
          int nRow, int nCol)
          if (value instanceof String)
               setText((String)value);
          // Adjust row's height
          int width = table.getColumnModel().getColumn(nCol).getWidth();
          setSize(width, 1000);
          int rowHeight = getPreferredSize().height;
          if (table.getRowHeight(nRow) != rowHeight)
               table.setRowHeight(nRow, rowHeight);
          this.setBackground(Color.WHITE);
          return this;
}

Way to listen for change in JTable cell?

I am having troubles trying to catch a key event while the user is entering text inside a given JTable cell (x/y location). The JTable only seems to manage String objects in it's cells so I can't place a JTextField in there with a KeyListener on it.
Currently, I can only get control of the application once the user has left the cell they are editing.
Does anyone have an example of a JTable 'cell KeyListener' scenario? At this point I want to see if I can print 'hello world' each time I type a character within a cell. Then I'll go from there....

If you want to know when the contents of a cell have been updated you should use a TableModelListener.
If you want to know when a character is added/removed from the cell editor then you need to first understand how this works with a simple text field.
Typically you would use a DocumentListener to receive notifies of a change to the text field. However, within the DocumentEvent you wouldn't be able to change the text field as this notification comes after the text field has already been updated.
If you need to ability to intercept changes to the text field before they happen, then you would need to use a DocumentFilter. An example of using a DocumentFilter is given in the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/generaltext.html#filter]Text Component Features.
Once you get your regular text field working the way you want, the next step to create a DefaultCellEditor using this JTextField and use this editor in your JTable. The above tutorial also has a section on using editors in a table.

Multiple JButtons inside JTable cell - Dispatch mouse clicks

Hi.
I know this subject has already some discussions on the forum, but I can't seem to find anything that solves my problem.
In my application, every JTable cell is a JPanel, that using a GridLayout, places vertically several JPanel's witch using an Overlay layout contains a JLabel and a JButton.
As you can see, its a fairly complex cell...
Unfortunately, because I use several JButtons in several locations inside a JTable cell, sometimes I can't get the mouse clicks to make through.
This is my Table custom renderer:
public class TimeTableRenderer implements TableCellRenderer {
     Border unselectedBorder = null;
     Border selectedBorder = null;
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
               boolean hasFocus, int row, int column) {
          if (value instanceof BlocoGrid) {
               if (isSelected) {
                    if (selectedBorder == null)
                         selectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getSelectionBackground());
                    ((BlocoGrid) value).setBorder(selectedBorder);
               } else {
                    if (unselectedBorder == null)
                         unselectedBorder = BorderFactory.createMatteBorder(2,2,2,2, table.getBackground());
                    ((BlocoGrid) value).setBorder(unselectedBorder);
          return (Component) value;
}and this is my custom editor (so clicks can get passed on):
public class TimeTableEditor extends AbstractCellEditor implements TableCellEditor {
     private TimeTableRenderer render = null;
     public TimeTableEditor() {
          render = new TimeTableRenderer();
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int column) {
         if (value instanceof BlocoGrid) {
              if (((BlocoGrid) value).barras.size() > 0) {
                   return render.getTableCellRendererComponent(table, value, isSelected, true, row, column);
         return null;
    public Object getCellEditorValue() {
        return null;
}As you can see, both the renderer and editor return the same component that cames from the JTable model (all table values (components) only get instantiated once, so the same component is passed on to the renderer and editor).
Is this the most correct way to get clicks to the cell component?
Please check the screenshot below to see how the JButtons get placed inside the cell:
http://img141.imageshack.us/my.php?image=calendarxo9.jpg
If you need more info, please say so.
Thanks.

My mistake... It worked fine. The cell span code was malfunctioning. Thanks anyway.

MouseListener for JTable cells using html

Hello,
I'm trying to write a MouseListener that determines whether the cursor is positioned over a certain string within a JTable cell. The cell contains an html string to allow for some formatting.
For instance, the table data for a certain cell could be "<html><b>SomeBoldText</b>moreText<html>". I would like to detect when a mouse click occurs on the bold text.
My current solution is to create the glyph vector corresponding to the cell content stripped of all html tags and then check if the cursor position is within one of the glyphs that form the string. However, that obviously doesn't take into account the formatting done by html, so its not working very well.
Any suggestions?

the only way you could possibly do this, if you used JEditorPane as a renderer. even then i'm not sure.

Can JTable cell acts as JList?

I was planning to create an Event Calendar view in Monthly. Currently my jTable cell extends JTextArea. My problem is that, for example, today I got 2 events display in one cell, when a user double-click the "today" cell, an edit form will pop out, if there are 2 events in one cell, how I know which events to be edit? In this case I was thinking to use JList instaed of jTextArea. so i can choose which event to be edit. Is there any example showing how to implement jTable with jList cell? or is there any other method to overcome it?

I haven't used a JList in a JTable so far, but for a JComboBox you find a working example in the tutorial. That may give you some ideas.
What I did use is a (read only) JTable in a JTable. So if you don't achieve your goal with JList there are alternatives.
But wait for our table specialists to come along.

JTextField/JTable-cell Button

Is there any known efficient methods of creating the JTextField or JTable-cell Button as like in Forte's Component Inspector window where you click on the property value field and the value is displayed just left of a small button labelled "..." ie: [some text field with value][...] also referred to as the "ellipsis" buttons, or will most answers to this question simply describe the layout of a JField-JButton combination? The action from clicking on the [...] button aligned right of the JTextField simply invokes or displays a larger input interface in which upon completion of the entered data, returns the input to the related JTextField.
Thanks to anybody for any help with this, and perhaps in return, I may be able to answer any non-gui java questions, or some not so unfamilliar GUI questions.

Hello StanislavL and Lutianxiong,
I remember asking this question some time ago, and the time has come again for me to seek this functionality. I have finally achieved the functionality and thought I would post the answer for anybody else. I had not realized that I had recieved a solution/reply to my original question as I come here to post the answer, and in fact, my solution does appear to be very similiar to your reply, StanislavL. As for you, Lutianxiong and other seekers of this info, here is my solution with a JFileChooser style input for the 3rd column which only shows gif,jpg and png files:
<code>
------------- TableCellFileInput.java -------------------
public class TableCellFileInput extends javax.swing.JPanel {
private String extensions[];
public TableCellFileInput(String fileExtensions[]) {
extensions = fileExtensions;
self = this;
initComponents();
private void initComponents() {
valueField = new javax.swing.JTextField();
fileButton = new javax.swing.JButton();
setLayout(new java.awt.BorderLayout());
valueField.setText("jTextField1");
add(valueField, java.awt.BorderLayout.CENTER);
fileButton.setText("...");
fileButton.setMargin(new java.awt.Insets(0, 2, 0, 2));
fileButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
fileButtonActionPerformed(evt);
add(fileButton, java.awt.BorderLayout.EAST);
private void fileButtonActionPerformed(java.awt.event.ActionEvent evt) {
String filePath = valueField.getText();
if(filePath != null && filePath.length() > 0) {
filePath = new java.io.File(filePath).getParent();
javax.swing.JFileChooser chooser
= new javax.swing.JFileChooser(filePath);
chooser.setFileFilter(new ImageFilter());
int returnVal = chooser.showOpenDialog(this);
if(returnVal == javax.swing.JFileChooser.APPROVE_OPTION) {
valueField.setText(chooser.getSelectedFile().getAbsolutePath());
class ImageFilter extends javax.swing.filechooser.FileFilter {
public boolean accept(java.io.File f) {
if(f.isDirectory()) return true;
String fName = f.getName();
if(extensions != null) {
for(int i=0;i<extensions.length;i++) {
if(fName.endsWith(extensions[ i ])) return true;
return false;
public String getDescription() {
return DESCRIPTION;
class CustomCellEditor extends javax.swing.AbstractCellEditor
implements javax.swing.table.TableCellEditor {
public Object getCellEditorValue() {
return valueField.getText();
public java.awt.Component getTableCellEditorComponent(javax.swing.JTable table, Object value, boolean isSelected, int row, int column) {
System.out.println("fileEditor");
if(value == null) valueField.setText("");
else valueField.setText(value.toString());
return self;
public void setColumn(javax.swing.table.TableColumn column) {
column.setCellEditor(new CustomCellEditor());
private javax.swing.JButton fileButton;
private javax.swing.JTextField valueField;
private static final String DESCRIPTION = "Image File Filter";
private java.awt.Component self;
------------- TestTable .java -------------------
public class TestTable extends javax.swing.JFrame {
public TestTable() {
editorField = new javax.swing.JTextField();
String fileExts[] = {"gif","jpg","png"};
fileEditorField = new TableCellFileInput(fileExts);
initComponents();
javax.swing.table.TableColumn column
= jTable1.getColumn("Title 3");
fileEditorField.setColumn(column);
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
exitForm(evt);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, "cats"},
{null, null, null, "dogs"},
{null, null, null, "mice"},
{null, null, null, "birds"}
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
Class[] types = new Class [] {
java.lang.Object.class, java.lang.Object.class, java.lang.Object.class, java.lang.String.class
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
jScrollPane1.setViewportView(jTable1);
getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-400)/2, (screenSize.height-300)/2, 400, 300);
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit(0);
public static void main(String args[]) {
new TestTable().show();
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
private javax.swing.JTextField editorField;
private TableCellFileInput fileEditorField;
</code>

Implementing Copy and Paste on JTable cells.

Hi to all,
Can anybody suggest as how to impose copy and paste with Ctrl-C and Ctrl-V by using keys on JTable cells.
Thanks in advance.
khiz_eng

First, add a key listener to the table itself (most likely in the constructor for your table), like so:
addKeyListener(new KeyListener()
    public void keyTyped(KeyEvent e) {}
    public void keyReleased(KeyEvent e) {}
    public void keyPressed(KeyEvent e)
      tableKeyPressed(e);
});Next, add the code for the "tableKeyPressed" method. Here's a skeleton you can use as a starting point (obviously, the exact code to copy and paste will depend on the nature of the data you are trying to transfer).
protected void tableKeyPressed(KeyEvent e)
    // Get selected cols and rows:
    int[] selectedRows = getSelectedRows();
    int[] selectedCols = getSelectedColumns();
    // A "copy" is signified by either ctrl+c, meta+c, or the "copy" button on a Sun keyboard.
    // Unfortunately, Java does not abstract this for us, so we have to test each of these conditions:
    if ((e.getKeyCode() == KeyEvent.VK_COPY) ||
        ((e.getKeyCode() == KeyEvent.VK_C) && e.isControlDown()) ||
        ((e.getKeyCode() == KeyEvent.VK_C) && e.isMetaDown()))
      // Grab the cell(s) that are currently selected by using the selectedRows
      // and selectedCols arrays from above. Then copy this data to the clipboard.
    // A "paste" is signified by either ctrl+v, meta+v, or the "paste" button on a Sun keyboard.
    // Again, Java does not abstract this for us, so each condition must be tested:
    else if ((e.getKeyCode() == KeyEvent.VK_PASTE) ||
         ((e.getKeyCode() == KeyEvent.VK_V) && e.isControlDown()) ||
         ((e.getKeyCode() == KeyEvent.VK_V) && e.isMetaDown()))
      // Make sure there is valid data in the clipboard.
      // If so, paste it into the selected cell(s).
}(By the way, this code assumes that you are running on a Sun machine with a Sun keyboard. If you are only targeting windows boxes, then the only key press you really need to worry about is CTRL+C. There's no harm in leaving the other keys in, though.
Hope that helps,
Steve

Start or stop edit jtable cell editing

Hello,
I got a problem with the jtable DefaultModel isCellEditable.
If I set the IsCellEditable to false, I would not be able to enable the cell selection as and when I want it.
What I have in mind is the add a mouselister so that if the user select a row using fast left mouse click like the procedure shown below
private class MouseClickHandler extends MouseAdapter {
public void mouseClicked(MouseEvent event) {
int no_mouseclick = 0;
no_mouseclick = event.getClickCount();
if (no_mouseclick >= 2) {
int cur_row = 0;
cur_row = table.getSelectedRow();
// table.setColumnSelectionAllowed(true);
// table.setRowSelectionAllowed(true);
for (int i=0;i<table.getColumnCount();i++){
table.editCellAt(cur_row,i);
System.out.println("mouse row--->" + cur_row);
I could overwrite the IsCellEditable to true to enable that particular or cell contains in that row to be able to accept input and overwrite any data which in my case obtained from the Sql database a sort of like input module using tabulation . I am also thinking of using text component or combobox to display the value for user selection , but I do not know how to enable a particular cell for editing if the Jtable created is using a non-editable DefaultModel. If I set the IsCellEditable to true, every single cell would be enable for editing , and this defeat the purpose of enable user input only upon double mouseclicks.
By the way , I am interested to know how to track the data changes in the cell within the jtable so that only those have been modified are notify from the Table model and updated into the Sql table
Could anyone of you out there provide some hints please
Thanks

Hello,
Tablemodellistener could detect the changes in the data, how about the backend database updating and transactional activity that must be associated with the data changes?
What is on my mind is that , the moment there is changes in the data detected by the TableModellistener, whatever records associated with or brougt up by Jtable would be all deleted from the database and then follow by the new set of new records to be inserted into the database. The disadvantage of this method is that everytime the backend database connection and activity need to be executed the moment there is a change in the data in the jtable cell. For example the user may be just amendment to only one cell , but all the records associated need to be deleted and then inserted again.
Perhaps there are better solution to deal with Jtable and JDBC backend connection where in this case, I am using JDO to undertake the database activity like the observable modelling .
Could someone provide the hint please
Thank

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

JTable Cell length

Hi ,
How to fix cell length of the Jtable of a particular column.For ex column2 in my JTable accepts only 5 chars.How to do that?
Thanks in advance.

I think the OP wants to restrict input, not set the physical width.
You need to provide a TabeCellEditor implementation which provides a restricted JTextField where appropriate - eg a JFormattedTextField or a JTextField with a custom Document.

Grab Focus in a JTable cell

Hi,
I have a JTable with only one editable column. The user should write some informations always in the same column and this will be checked: if the input.length=9, the whole row will be filled with data and a new row will be added. The focus remains in the same column at the last row. If the input.length!=9 , a message appears and the input should be deleted and the focus should remain in the same cell, in order to permit the user to input the correct information. By my code goes the focus to another cell
import java.awt.*;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
public class Test implements TableModelListener{
    DefaultTableModel model;
    JTable table;
    final int LIMIT=9;
   public Test(){
         createTable();
         JPanel leftPanel = new JPanel(new BorderLayout(6, 6));
         leftPanel.add(new JScrollPane(table), BorderLayout.CENTER);
         JPanel centerPanel = new JPanel(new GridLayout(1, 2, 6, 6));
         centerPanel.add(leftPanel);
         JPanel contentPane = new JPanel(new BorderLayout(6, 6));
         contentPane.add(centerPanel, BorderLayout.CENTER);
         JFrame f = new JFrame("Test Frame");
         f.setContentPane(contentPane);
         f.pack();
         f.setLocationRelativeTo(null);
         f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
         f.setVisible(true);
    public static void main(String[] args) {
        new Test();
private void createTable() {
        table=new JTable();
        model = new DefaultTableModel() {
                @Override
                public boolean isCellEditable(int row, int col) {
                   if(col==1 ){
                        return true;
                   }else{
                        return false;
         model.addColumn("A");
         model.addColumn("B");
         model.addColumn("C");
         model.addColumn("D");
         model.addColumn("E");
         model.addColumn("F");
         model.addTableModelListener(this);
         table.setModel(model);
         table.setCellSelectionEnabled(true);
         table.setColumnSelectionAllowed(true);
         table.setRowSelectionAllowed(true);
         addEmptyRow() ;
    public void tableChanged(TableModelEvent e) {
       if(e.getColumn()==1 && model.getRowCount()>0){
           String line=(String)model.getValueAt(model.getRowCount()-1,1);
           if(line.length()==LIMIT){
                    addDataToLastRow(line);
           if(!line.isEmpty() && line.length()!=LIMIT){
                if (table.getCellEditor() != null) {
                        table.getCellEditor().cancelCellEditing();
                JOptionPane.showMessageDialog(null, "Information has wrong format");
                loescheLastRow();
    private void addDataToLastRow(String info) {
       int lastRow =model.getRowCount()-1;
       model.setValueAt(info, lastRow, 2);
       model.setValueAt(info, lastRow, 3);
       model.setValueAt(info, lastRow, 4);
       model.setValueAt(info, lastRow, 5);
       addEmptyRow();
    private void loescheLastRow() {
            model.removeRow(model.getRowCount() - 1);
            addEmptyRow();
    private void addEmptyRow() {
       Vector temp=new Vector();
       temp.add(model.getRowCount()+1);
       temp.add("");
       temp.add("");
       temp.add("");
       temp.add("");
       temp.add("" );
       model.addRow(temp);
       focusEmptyRow();
    void focusEmptyRow(){
       int row = model.getRowCount()-1;
       //System.out.println("row:"+row);
       int col = 1;
        // Set the cell in edit mode
        boolean success = table.editCellAt(row, col);
        //System.out.println("success:"+success);
        if (success) {
            // Select cell
            boolean toggle = false;
            boolean extend = false;
            table.changeSelection(row, col, toggle, extend);
            table.requestFocus();
}

hii,
please change value for Column from 1 to 0, because Row&Column starts with 0
                   if(col==0 ){ // because you addedd only one column (==0), edidable flags doesn't works
                        return true;
                   }else{
                        return false;
// and
       //System.out.println("row:"+row);
        int col = 0; // again you select 2nd. Column
        // Set the cell in edit mode... kopik

JTable cell only numerical

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