JTable Cell Transfer On Table Changed Event

Hi, sorry if this has been hashed out before but I have a JTable that when pressing the TAB key will transfer the focus from one column cell to the next column (same row). What I would like to do is that when a character is entered from the keyboard (a number in this case), the focus is automatically transferred to the next column. My JTable is configured as with custom layout and the DefaultTableCellRenderer. I'm assuming that I would have to have a key listener that acts on the numbers but from there, I'm not exactly sure what I need to do. I tried issuing transferFocus when the tableListener is fired on a cell change but it didn't do anything so I am a bit lost
Any help here would be great!
Thanks...
Chris.

Check out [Key Bindings|http://www.camick.com/java/blog.html?name=key-bindings]. It sounds like you want to "share an Action with a different KeyStroke".

Similar Messages

TableModelEvent is always the same - one cell or entire table changed

Why does JUTableModel fire always the same event, if you change a single cell, or entire table structure changes.
Event always looks like this:
first row: 0
last row: 2147483647
type: 0
column: -1
source class: oracle.jbo.uicli.jui.JUTableBinding$JUTableModel
I need to distinguish between a single cell change and entire table structure change.

Thanks for getting back at this.
Unfortunately I get a 0, when I try to reproduce your solution. Of course, I am using the German version, but it should be the right formula.
When I leave out the $-signs in the search array I get a 0. See second picture.
Am I doing it wrong?
Lukas

JTable cell value doesn't change with user input

I'm making a program that uses a custom table model (extends AbstractTableModel). The problem is when I type a value in one of the table cells, then press enter (or click outside the cell), the value goes back to what it was originally. So for example, a cell has "oldvalue", I type in "newvalue", press enter, and now the cell still reads "oldvalue". I figured the renderer would automatically update the cell by calling MyTableModel.setValueAt (...), but maybe I need a listener to do this? let me know. thanks

alright, well basically I'm making a database manager
and thought it would be easier to extend
AbstractTableModel and then do all the queries inside
the methods instead of listening for events. Second
thing, I put a debug statement and setValueAt never
gets called when you type in a new cell value. How
does it update the cell then is my question?It's your TableModel bug but a much better advice would be that you should use
DefaultTableModel instead of extending AbstractTableModel. The DefaultTableModel
is usually more than enough for an ordinary JTable application.
The simplest and standard way of handling DB data from JTable is updating
vectors for DefaultTableModel data with your new DB data set. You don't need
to worry about low-level event firing, cell editor control etc. if you use
DefaultTableModel. See API documentation of DefaultTableModel closely.

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

How to populate change from one Table cell to more Tables??

Dear Friends:
I have following successfully running code, each can populate 1 table cell updating in ChangeTableSelectionMain1 change to another table in ChangeTableSelectionMain1 also, or populate 1 table cell in ChangeTableSelectionSub1 change to another table in ChangeTableSelectionSub1 also, But cannot populate table cell updating in ChangeTableSelectionMain1 to ChangeTableSelectionSub1, Please advice how to make populating table cell updating in ChangeTableSelectionMain1 to ChangeTableSelectionSub1 successful??
Thanks.
[1]. main code:
package com.com;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import java.awt.GridLayout;
public class ChangeTableControl1 implements java.io.Serializable{
     private JFrame                frame;
     public static void main(String args[]) {
          try {
               ChangeTableControl1 window = new ChangeTableControl1();
               window.frame.setVisible(true);
          } catch (Exception e) {
               e.printStackTrace();
      * Create the application
     public ChangeTableControl1() {
          initialize();
      * Initialize the contents of the frame
     private void initialize() {
          frame = new JFrame();
          frame.setBounds(0, 0, 1500, 675);
          final ChangeTableSelectionMain1      c1      = new ChangeTableSelectionMain1();
          final ChangeTableSelectionSub1           c2      = new ChangeTableSelectionSub1();
          JSplitPane sp = new JSplitPane();
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          final JPanel panel = new JPanel();
          panel.setLayout(new GridLayout(1, 2));
          frame.getContentPane().add(panel, BorderLayout.CENTER);
          sp.setLeftComponent(c1);
          sp.setRightComponent(c2);
          sp.setResizeWeight(0.5);
          panel.add(sp);// add right part
            frame.addWindowListener(new WindowAdapter() {
                 public void windowClosing(WindowEvent e) {
                     System.exit(0);
             frame.pack();
             frame.setVisible(true);
}[2]. ChangeTableSelectionSub1
package com.com;
import javax.swing.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import java.awt.FlowLayout;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.text.SimpleDateFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
public class ChangeTableSelectionSub1 extends JPanel{
       protected         JButton                bt11 = new JButton("Insert before");
       protected         JButton                bt22 = new JButton("Insert after");
       protected         JButton                bt33 = new JButton("Delete");
       protected      ChangeTableSelectionMain1 lm = new ChangeTableSelectionMain1();
public ChangeTableSelectionSub1() {
     JPanel pnl = new JPanel();
     pnl.setMinimumSize(new Dimension(200,600));
          //pnl.setPreferredSize(new Dimension(800,600));
          final JTable tbl1 = new JTable(lm.data,lm.columnNames);
          final JTable tbl2 = new JTable(lm.data,lm.columnNames);
          JScrollPane scr1 = new JScrollPane(tbl1);
          JScrollPane scr2 = new JScrollPane(tbl2);
          lm.tbl1.getSelectionModel().addListSelectionListener(new ListSelectionListener()
          public void valueChanged(ListSelectionEvent lse)
               if (lm.tbl1.getSelectedRow()!=-1)
                    tbl2.clearSelection();
                    System.out.print("[1]. LongguChangeTableSelectionSub get msg from LongguChangeTableSelectionMain");
                    tbl1.clearSelection();
                    revalidate();
          lm.tbl2.getSelectionModel().addListSelectionListener(new ListSelectionListener()
     public void valueChanged(ListSelectionEvent lse)
          if (tbl2.getSelectedRow()!=-1)
               tbl1.clearSelection();
          System.out.print("[2]. LongguChangeTableSelectionSub get msg from LongguChangeTableSelectionMain");
          revalidate();
     pnl.setLayout(new FlowLayout());
     pnl.add(scr1);
     pnl.add(scr2);
     this.add(pnl);
public static void main(String []args)
     ChangeTableSelectionSub1 c = new ChangeTableSelectionSub1();
     JFrame frm = new JFrame();
     frm.setSize(920,400);
     frm.getContentPane().add(c);
     frm.setVisible(true);
}[3]. ChangeTableSelectionMain1
package com.com;
import javax.swing.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.JScrollPane;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import java.awt.FlowLayout;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import javax.swing.*;
public class ChangeTableSelectionMain1 extends JPanel{
       protected         JButton                bt11 = new JButton("Insert before");
       protected         JButton                bt22 = new JButton("Insert after");
       protected         JButton                bt33 = new JButton("Delete");
       protected String[] columnNames = {"First Name",
                    "Last Name",
                    "Sport",
                    "# of Years",
                    "Vegetarian"};
       protected Object[][] data = {
          {"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false)},
          {"Alison", "Huml","Rowing", new Integer(3), new Boolean(true)},
          {"Kathy", "Walrath","Knitting", new Integer(2), new Boolean(false)},
          {"Sharon", "Zakhour","Speed reading", new Integer(20), new Boolean(true)},
          {"Philip", "Milne","Pool", new Integer(10), new Boolean(false)} };
       protected JTable tbl1 = new JTable(data,columnNames);
       protected JTable tbl2 = new JTable(data,columnNames);
public ChangeTableSelectionMain1() {
     JPanel pnl = new JPanel();
     pnl.setMinimumSize(new Dimension(200,600));
          //pnl.setPreferredSize(new Dimension(800,600));
          JScrollPane scr1 = new JScrollPane(tbl1);
          JScrollPane scr2 = new JScrollPane(tbl2);
          tbl1.getSelectionModel().addListSelectionListener(new ListSelectionListener()
          public void valueChanged(ListSelectionEvent lse)
               if (tbl1.getSelectedRow()!=-1)
                    tbl2.clearSelection();
               if (lse.getValueIsAdjusting())
                   System.out.println("Selected from " + lse.getFirstIndex() + " to " + lse.getLastIndex());
               revalidate();
          tbl2.getSelectionModel().addListSelectionListener(new ListSelectionListener()
     public void valueChanged(ListSelectionEvent lse)
          if (tbl2.getSelectedRow()!=-1)
               tbl1.clearSelection();
               revalidate();
     pnl.setLayout(new FlowLayout());
     pnl.add(scr1);
     pnl.add(scr2);
     this.add(pnl);
public static void main(String []args)
     ChangeTableSelectionMain1 c = new ChangeTableSelectionMain1();
     JFrame frm = new JFrame();
     frm.setSize(920,400);
     frm.getContentPane().add(c);
     frm.setVisible(true);
}Message was edited by:
sunnymanman

I have following successfully running code, each can populate 1 table cell updating in ChangeTableSelectionMain1 change to another table in ChangeTableSelectionMain1 also, or populate 1 table cell in ChangeTableSelectionSub1 change to another table in ChangeTableSelectionSub1 also, But cannot populate table cell updating in ChangeTableSelectionMain1 to ChangeTableSelectionSub1, Please advice how to make populating table cell updating in ChangeTableSelectionMain1 to ChangeTableSelectionSub1 successful??
My brain hurts, does yours?

Problem in event handling of combo box in JTable cell

Hi,
I have a combo box as an editor for a column cells in JTable. I have a event listener for this combo box. When ever I click on the JTable cell whose editor is combo box,
I get the following exception,
Exception occurred during event dispatching:
java.lang.NullPointerException
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.setDispatchComponent(Unknown Source)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(Unknown Source)
     at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Can any one tell me how to over come this problem.
Thanks,
Raghu

Here's an example of the model I used in my JTable. I've placed 2 comboBoxes with no problems.
Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
public boolean isCellEditable(int rowIndex, int columnIndex)
// The 2nd & 3rd column or Value field is editable
if(isEditable)
if(columnIndex > 0)
return true;
return false;
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c)
return getValueAt(0, c).getClass();
* Retrieves number of columns
public synchronized int getColumnCount()
return NUM_COLUMNS;
* Get a column name
public String getColumnName(int col)
return columnNames[col];
* Retrieves number of records
public synchronized int getRowCount()
if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
* Clears all records
public synchronized void clear()
int oldNumRows = numRows;
numRows = START_NUM_ROWS;
data.removeAllElements();
nextEmptyRow = 0;
if (oldNumRows > START_NUM_ROWS)
fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
fireTableRowsUpdated(0, START_NUM_ROWS - 1);
* Loads the values into the combo box within the table for mail id
public void setUpMailColumn(JTable mapTable, ArrayList mailList)
TableColumn col = mapTable.getColumnModel().getColumn(1);
javax.swing.JComboBox comboMail = new javax.swing.JComboBox();
int s = mailList.size();
for(int i=0; i<s; i++)
comboMail.addItem(mailList.get(i));
col.setCellEditor(new DefaultCellEditor(comboMail));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for mail Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Mail Id to see a list of choices");
* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
for(int i=0; i<s; i++)
combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
//Set up tool tips.
DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
}

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.

Button to change bg-color in JTable cell

Hello!
I would like to change the background color of a cell with a klick on a button.
There will be 3 colors, and the selected cell are the only one thats going to change.
How do I do that?
Heres my code:
import javax.swing.*;
import java.awt.Color;
import java.awt.Component;
import java.awt.Rectangle;
import javax.swing.JButton;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
public class Kinna extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JTabbedPane jTabbedPane = null;
     private JScrollPane jScrollPane = null;
     private JTable jTable = null;
     private JButton jButtonRed = null;
     private JButton jButtonGreen = null;
     private JButton jButtonBlue = null;
     private JButton jButtonNewWeek = null;
     private JButton jButtonDelWeek = null;
      * This method initializes jTabbedPane
      * @return javax.swing.JTabbedPane
     private JTabbedPane getJTabbedPane() {
          if (jTabbedPane == null) {
               jTabbedPane = new JTabbedPane();
               jTabbedPane.setBounds(new Rectangle(105, 45, 545, 488));
               jTabbedPane.addTab(null, null, getJScrollPane(), null);
          return jTabbedPane;
      * This method initializes jScrollPane
      * @return javax.swing.JScrollPane
     private JScrollPane getJScrollPane() {
          if (jScrollPane == null) {
               jScrollPane = new JScrollPane();
               jScrollPane.setViewportView(getJTable());
          return jScrollPane;
      * This method initializes jTable
      * @return javax.swing.JTable
     private JTable getJTable() {
          if (jTable == null) {
               Object[] head = {"Namn", "M�ndag", "Tisdag", "Onsdag", "Torsdag", "Fredag"};
               Object[][] data = {{"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"},
                                        {"Niklas", "9-15", "9-15", "9-15", "9-15","9-15"}};
               jTable = new JTable(data, head);
                  // This table shades every other column yellow
          return jTable;
      * This method initializes jButtonRed
      * @return javax.swing.JButton
     private JButton getJButtonRed() {
          if (jButtonRed == null) {
               jButtonRed = new JButton("R�d");
               jButtonRed.setBounds(new Rectangle(15, 30, 76, 31));
               jButtonRed.setText("R�d");
               jButtonRed.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
          return jButtonRed;
      * This method initializes jButtonGreen
      * @return javax.swing.JButton
     private JButton getJButtonGreen() {
          if (jButtonGreen == null) {
               jButtonGreen = new JButton("R�d");
               jButtonGreen.setBounds(new Rectangle(15, 75, 76, 31));
               jButtonGreen.setText("Gr�n");
          return jButtonGreen;
      * This method initializes jButtonBlue
      * @return javax.swing.JButton
     private JButton getJButtonBlue() {
          if (jButtonBlue == null) {
               jButtonBlue = new JButton("R�d");
               jButtonBlue.setBounds(new Rectangle(15, 120, 76, 31));
               jButtonBlue.setText("Bl�");
          return jButtonBlue;
      * This method initializes jButtonNewWeek
      * @return javax.swing.JButton
     private JButton getJButtonNewWeek() {
          if (jButtonNewWeek == null) {
               jButtonNewWeek = new JButton();
               jButtonNewWeek.setBounds(new Rectangle(270, 0, 91, 31));
               jButtonNewWeek.setText("Ny Vecka");
               jButtonNewWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         int i = getJTabbedPane().getSelectedIndex() + 1;
                         String tab = "Index: " + i;
                         getJTabbedPane().addTab(tab, new JLabel("Hello"));
                         getJTabbedPane().setSelectedIndex(getJTabbedPane().getTabCount()-1);
          return jButtonNewWeek;
      * This method initializes jButtonDelWeek
      * @return javax.swing.JButton
     private JButton getJButtonDelWeek() {
          if (jButtonDelWeek == null) {
               jButtonDelWeek = new JButton();
               jButtonDelWeek.setBounds(new Rectangle(375, 0, 121, 31));
               jButtonDelWeek.setText("Ta bort vecka");
               jButtonDelWeek.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         System.out.println("actionPerformed()");
                         getJTabbedPane().removeTabAt(getJTabbedPane().getSelectedIndex());
          return jButtonDelWeek;
      * @param args
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    Kinna thisClass = new Kinna();
                    thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                    thisClass.setVisible(true);
      * This is the default constructor
     public Kinna() {
          super();
          initialize();
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      * @return void
     private void initialize() {
          this.setSize(670, 580);
          this.setContentPane(getJContentPane());
          this.setTitle("JFrame");
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          if (jContentPane == null) {
               jContentPane = new JPanel();
               jContentPane.setLayout(null);
               jContentPane.add(getJTabbedPane(), null);
               jContentPane.add(getJButtonRed(), null);
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If you have a different color for every cell in the table, then maybe it would be easier to store a custom Object in the TableModel that has two pieces of information:
a) the text to be displayed
b) the background color of the text.
Then you can write a custom renderer that uses both pieces of information to renderer the cell correctly.
Here is an untested example of what the custom renderer might look like:
class ColorRenderer extends DefaultTableCellRenderer
     public Component getTableCellRendererComponent(
               JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
          super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
          CustomObject custom = (CustomObject)value;
          setText( custom.getText() );
          if (!isSelected)
               setBackground( custom.getBackground() );
          return this;
}

How to make a cell in a JTable to be uneditable and handle events

I tried many things but failed,How do you make a cell in a JTable to be uneditable and also be able to handle events>Anyone who knows this please help.Thanx

Hello Klaas2001
You can add KeyListener ,MouseListener
Suppose you have set the value of cell using setValueAt()
table.addKeyListener(this);
public void keyTyped(KeyEvent src)
String val="";
int r= table.getEditingRow();
int c= table.getEditingColumn();
val=table.getValueAt(r,c).toString();
if (r!=-1 && c!=-1)
TableCellEditor tableCellEditor = table.getCellEditor(r, c);
tableCellEditor.stopCellEditing();
table.clearSelection();
table.setValueAt(val,r,c);
public void keyReleased(KeyEvent src)
public void keyPressed(KeyEvent src)
table.addMouseListener(this);
public void mouseClicked(MouseEvent e)
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
public void mousePressed(MouseEvent e)
public void mouseReleased(MouseEvent e)
if(e.getClickCount()>=2)//Double Click
table.clearSelection();
int r= table.getEditingRow();
int c= table.getEditingColumn();
if (r!=-1 && c!=-1)
TableCellEditor tableCellEditor = table.getCellEditor (
r,c);
tableCellEditor.stopCellEditing();
table.clearSelection();
table.setValueAt("",r,c);
}//Mouse Released
You can remove keyListener and Mouse Listener whenever You want to edit
then add it later.
Regarding handling events implement javax.swing.event.TableModelListener
table.getModel().addTableModelListener(this);
public void tableChanged(javax.swing.event.TableModelEvent source)
TableModel tabMod = (TableModel)source.getSource();
     switch (source.getType())
case TableModelEvent.UPDATE:
     break;
     }//Table Changed Method
//This method gets fired after table cell value is changed.

Capturing events from a JCheckBox in a JTable cell

I am trying to capture item state changed event from a JCheckbox in a JTable. When user selects checkbox I do insert in database and on deselect I do delete from database. The item state changed event is not firing correctly...can you please tell me what I am doing wrong. My JTable uses CustomModel which is used by many other apps. So I can not really modify CustomModel only to work with my JTable. Here is my code.
public class MyClass extends JPanel
.....some code to add panel, jscorollpane, etc.
ResultSet res;
GUI gui; //Custom Class to deal with different GUI layouts
JTable myJTable = new JTable();
GUI.CustomModel custModel;
public void init()
     displayJTable();
attachCheckBoxListeners();
private void displayForms()
     res = //resultset from DB
Vector cols = new Vector(10);
cols.addElement(new Integer(1);
gui.DisplayResultSetinTabel(res, myJtable, cols, null);
custModel= (GUI.CustomModel) ((TableSorter) myJTable.getModel()).getModel();
custModel.setEditableColumn(0, true);
//Attach CheckBox Listener to all the checkbox in JTable
private void attachCheckBoxListeners()
for(int row = 0; row< myJTable.getRowCount(); row++)
Object val = cm.getValueAt(row, 0);
final JCheckBox jcb = (JCheckBox) gridForms.getCellEditor(row, 0).getTableCellEditorComponent(gridForms, val, true, row, 0);
jcb.addItemListener( new java.awt.event.ItemListener() // Add Item Listener to trap events
public void itemStateChanged(java.awt.event.ItemEvent event)
               if(myJtable.getSelectedRow() == -1) // if no row is selected in table return
                    return;
               try
               if (res.absolute(myJtable.getSelectedRow())+1))
     if(jcb.isSelected())
saveData();();
     else
deleteData();
     catch(Exception e)
System.out.println("ERROR ");
} //end of AttachCheckBoxListeners ()
private void SaveData() {}
private void DeleteData() {}
Okay....the problem is when JCheckBox state is changed (by user) from Selected to Deselected itemStateChanged() is fired and it does delete from database. then again itemStateChanged() called it detects Jcheckbox as selected and does inseret in database. On Jtable gui...that checkbox is still shown as desected.
Please tell me what is going on here.....
Thank you.

In short - never listen to low-level events from editorComponents (low-level meaning everything below - and most of the time including - a editingStopped/editingCancelled of the cellEditor). Your problem belongs to the model realm - save if a cell value is changed - so solve it in the model realm by listening to event from the tableModel and trigger your business logic when you detect a change in that particular cell value.
Greetings
Jeanette

Code to change JTable cell color not working

My code below is supposed to change the color
of a single JTable cell however its not working.
Could anyone please tell me why?
Here's the code:
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
import java.awt.event.*;
public class ColorTable extends JTable {
public ColorTable() {
AbstractTableModel tableModel = new AbstractTableModel() {
public Class getColumnClass(int column) { return Integer.class; }
public int getColumnCount() { return 6; }
public int getRowCount() { return 10;}
public Object getValueAt(int row,int col) { return new Integer(row * col); }
setModel(tableModel);
setDefaultRenderer(Integer.class,new ColorRenderer(Color.cyan));
this.setRowSelectionAllowed(false);
this.setCellSelectionEnabled(true);
addMouseListener(new MouseAdapter() {
private ColorRenderer renderer;
private JColorChooser chooser = new JColorChooser();
public void mousePressed(MouseEvent e) {
if(e.getModifiers() == MouseEvent.BUTTON3_MASK) {
System.out.print("rowAtPoint(e.getPoint())=" +rowAtPoint(e.getPoint()));
System.out.print( "columnAtPoint(e.getPoint()))=" + columnAtPoint(e.getPoint()));
renderer = (ColorRenderer)getCellRenderer(rowAtPoint(e.getPoint()), columnAtPoint(e.getPoint()));
// chooser.setColor(renderer.getColor());
renderer.setColor(chooser.showDialog((Component)e.getSource(),"Choose Cell Color",chooser.getColor()));
class ColorRenderer extends DefaultTableCellRenderer {
private Color cellColor;
public ColorRenderer(Color color) { cellColor = color; }
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
System.out.print("row= " + row + "\n");
System.out.print("column= " + column + "\n");
System.out.print("OBJECT VALUE=" + value.toString());
//Component comp = super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
if (isSelected) {
setOpaque(true);
setBackground(cellColor);
else {
setBackground(Color.white);
setForeground(Color.black);
return this;
public void setColor(Color color)
cellColor = color;
ColorTable.this.repaint();
public Color getColor() { return cellColor; }
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
ColorTable table = new ColorTable();
panel.add(table);
frame.getContentPane().add(panel);
frame.setSize(500,250);
frame.setVisible(true);

My code below is supposed to change the color
of a single JTable cell however its not working.
Could anyone please tell me why?
Here's the code:
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
import java.awt.event.*;
public class ColorTable extends JTable {
public ColorTable() {
AbstractTableModel tableModel = new AbstractTableModel() {
public Class getColumnClass(int column) { return Integer.class; }
public int getColumnCount() { return 6; }
public int getRowCount() { return 10;}
public Object getValueAt(int row,int col) { return new Integer(row * col); }
setModel(tableModel);
setDefaultRenderer(Integer.class,new ColorRenderer(Color.cyan));
this.setRowSelectionAllowed(false);
this.setCellSelectionEnabled(true);
addMouseListener(new MouseAdapter() {
private ColorRenderer renderer;
private JColorChooser chooser = new JColorChooser();
public void mousePressed(MouseEvent e) {
if(e.getModifiers() == MouseEvent.BUTTON3_MASK) {
System.out.print("rowAtPoint(e.getPoint())=" +rowAtPoint(e.getPoint()));
System.out.print( "columnAtPoint(e.getPoint()))=" + columnAtPoint(e.getPoint()));
renderer = (ColorRenderer)getCellRenderer(rowAtPoint(e.getPoint()), columnAtPoint(e.getPoint()));
// chooser.setColor(renderer.getColor());
renderer.setColor(chooser.showDialog((Component)e.getSource(),"Choose Cell Color",chooser.getColor()));
class ColorRenderer extends DefaultTableCellRenderer {
private Color cellColor;
public ColorRenderer(Color color) { cellColor = color; }
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
System.out.print("row= " + row + "\n");
System.out.print("column= " + column + "\n");
System.out.print("OBJECT VALUE=" + value.toString());
//Component comp = super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
if (isSelected) {
setOpaque(true);
setBackground(cellColor);
else {
setBackground(Color.white);
setForeground(Color.black);
return this;
public void setColor(Color color)
cellColor = color;
ColorTable.this.repaint();
public Color getColor() { return cellColor; }
public static void main(String[] args) {
JFrame frame = new JFrame();
JPanel panel = new JPanel();
ColorTable table = new ColorTable();
panel.add(table);
frame.getContentPane().add(panel);
frame.setSize(500,250);
frame.setVisible(true);

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 cell listening to mouse event source

Hi, I have a JTable with single cell selections enabled.
I can also get the mouseClicked event working, but the cure is worse than the illness, because every cell I click on will cause a jframe to pop-up.
Ideally only column 0 or 1 listens to the mouseClicked event.
Can someone please tell mehow to work that into the JTable cell (sorry for the tediously long code, its only a small part)
import javax.swing.JComponent;
...lots of import...
public class CCYTable extends JPanel
JTable newtable;
JLabel tableHeader;
public CCYFrame NewFrame;
private boolean DEBUG = false;
private int showInfoTimer = 10000; // info tip box will pop up for this period of time...
// if both column and row selection are enabled, then individual cell selection
// is also enabled.
private boolean ALLOW_COLUMN_SELECTION = true;
private boolean ALLOW_ROW_SELECTION = true;
private boolean clickForDetail = true; // click on cell to launch frame with detail
protected String[] colHeaderInfo =
    {"Name of Instrument, move mouse to instrument for general detail of service.",
      ...lots of text...
// get values from database, use an "invisible column" for unique key
// description, conditions etc from Oracle...
String LoC = "Letter of Credit";
   ...more variable...
public void init()
    //setSize(300,300);
    tableHeader = new JLabel("uy or Sell", JLabel.CENTER);
    setLayout(new BorderLayout());
    newtable = new JTable(new TableDefinition())
      //Put cell info here, from Oracle CellInfo varchar2
      public String getToolTipText (MouseEvent mevt)
        String info = null;
        java.awt.Point p = mevt.getPoint();
        int rowIndex = rowAtPoint(p);
        int colIndex = columnAtPoint(p);
        int realColIndex = convertColumnIndexToModel(colIndex);
        Object currentValue = getValueAt(rowIndex, colIndex);
        if (realColIndex == 0)
        { if (currentValue.equals(LoC))
          { info = "Click to read general description of our \"" + LoC + "\" service." ;
          ... ideally I would like to work the mouseClicked listener in here but...
        return info;
      } // end of JComponent's method getToolTipText
      //Put table header info
      protected JTableHeader createDefaultTableHeader()
        return new JTableHeader(columnModel)
          public String getToolTipText(MouseEvent mevt)
            String tip = null;
            java.awt.Point p = mevt.getPoint();
            int index = columnModel.getColumnIndexAtX(p.x);
            int realIndex = columnModel.getColumn(index).getModelIndex();
            return colHeaderInfo[realIndex];
    if (clickForDetail)
      newtable.addMouseListener(new MouseAdapter()
        public void mouseClicked(MouseEvent mevt)
          { // ...but JTable wants it like this...
            // launch a new pop-up to replace the tool tip box
            NewFrame = new CCYFrame("blabla");
    ToolTipManager.sharedInstance().setDismissDelay(showInfoTimer);
    newtable.setPreferredScrollableViewportSize(new Dimension(770, 350));
    JScrollPane scrollpane = new JScrollPane(newtable);
    initColumnSizes(newtable);
    enableCellSelection(newtable);
    add("North", tableHeader);
    add("Center", scrollpane);
   * For sizing columns. If all column heads are wider than the column-cells'
   * contents, then just use column.sizeWidthToFit().
private void initColumnSizes(JTable newtable)
    TableDefinition tblmodel = (TableDefinition)newtable.getModel();
    TableColumn column = null;
    Component comp = null;
    int headerWidth=0, cellWidth=0;
    Object[] longValues = tblmodel.longValues;
    TableCellRenderer headerRenderer = newtable.getTableHeader().getDefaultRenderer();
    TableCellRenderer rightRenderer = new RightRenderer();
    for (int i = 0; i < 7; i++)
      column = newtable.getColumnModel().getColumn(i);
      comp = headerRenderer.getTableCellRendererComponent(
                             null, column.getHeaderValue(),
                             false, false, 0, 0);
      headerWidth = comp.getPreferredSize().width;
      comp = newtable.getDefaultRenderer(tblmodel.getColumnClass(i)).
                      getTableCellRendererComponent(
                             newtable, longValues,
true, true, 0, i);
cellWidth = comp.getPreferredSize().width;
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
TableColumn col2 = newtable.getColumnModel().getColumn(2);
col2.setCellRenderer( rightRenderer );
TableColumn col2Width = newtable.getColumnModel().getColumn(2);
col2Width.setPreferredWidth(2);
TableColumn col6 = newtable.getColumnModel().getColumn(6);
col6.setCellRenderer( rightRenderer );
TableColumn col6Width = newtable.getColumnModel().getColumn(6);
col6Width.setPreferredWidth(2);
}// end of method initColumnSizes
private void enableCellSelection(JTable newtable)
if (ALLOW_COLUMN_SELECTION)
if (ALLOW_ROW_SELECTION) {newtable.setCellSelectionEnabled(true);}
newtable.setColumnSelectionAllowed(true);
ListSelectionModel colSM = newtable.getColumnModel().getSelectionModel();
colSM.addListSelectionListener(new ListSelectionListener()
public void valueChanged(ListSelectionEvent lsevt)
if (lsevt.getValueIsAdjusting()) return;
ListSelectionModel lsm = (ListSelectionModel)lsevt.getSource();
if (lsm.isSelectionEmpty()) {}
else
//int selectedCol = lsm.getMinSelectionIndex();
//NewFrame = new CCYFrame("more blabla!");
}//end of method enableCellSelection
...a lot of code follows...
TIA :-)

Hi, thanks for the tip, but I get following compile-time error:
<identifier> expected
newtable.addMouseListener(new MouseAdapter()
.............................................^
package newtable does not exist
newtable.addMouseListener(new MouseAdapter()
...............^
2 errors
And here is how I've modified the code :
public class CCYTable extends JPanel
JTable newtable;
...lots of variables...
private boolean ALLOW_COLUMN_SELECTION = true;
private boolean ALLOW_ROW_SELECTION = true;
private boolean clickForDetail = true; // click on cell to launch frame with detail
protected String[] colHeaderInfo =
    {"Name of Instrument, move mouse to instrument for general detail of service.",
      ...lots of text for tooltipbox...
// get values from database, use an "invisible column" for unique key
// description, conditions etc from Oracle...
   ...lots more String variables...
public void init()
    //setSize(300,300);
    tableHeader = new JLabel("Bids and Offers", JLabel.CENTER);
    setLayout(new BorderLayout());
    newtable = new JTable(new TableDefinition())
      //Put cell info here, from Oracle CellInfo varchar2
      public String getToolTipText (MouseEvent mevt)
        String info = null;
        java.awt.Point p = mevt.getPoint();
        int rowIndex = rowAtPoint(p);
        int colIndex = columnAtPoint(p);
        int realColIndex = convertColumnIndexToModel(colIndex);
        Object currentValue = getValueAt(rowIndex, colIndex);
        if (realColIndex == 0)
        { if (currentValue.equals(LoC))
          { info = "Click to read general description of our \"" + LoC + "\" service." ;
        return info;
      } // end of JComponent's method getToolTipText
      newtable.addMouseListener(new MouseAdapter() // HELP: compiler throws error here !!!!!!!!
        public void mouseClicked(MouseEvent e)
          java.awt.Point p = mevt.getPoint();
          int rowIndex = rowAtPoint(p);
          int colIndex = columnAtPoint(p);
          int realColIndex = convertColumnIndexToModel(colIndex);
          Object currentValue = getValueAt(rowIndex, colIndex);
          if ((rowIndex == 0) and (colIndex == 0))
            // do stuff for this particular JTable cell ...
      //Put table header info
      protected JTableHeader createDefaultTableHeader()
        return new JTableHeader(columnModel)
          public String getToolTipText(MouseEvent mevt)
            String tip = null;
            java.awt.Point p = mevt.getPoint();
            int index = columnModel.getColumnIndexAtX(p.x);
            int realIndex = columnModel.getColumn(index).getModelIndex();
            return colHeaderInfo[realIndex];
    ToolTipManager.sharedInstance().setDismissDelay(showInfoTimer);
    newtable.setPreferredScrollableViewportSize(new Dimension(770, 350));
    JScrollPane scrollpane = new JScrollPane(newtable);
    initColumnSizes(newtable);
    enableCellSelection(newtable);
    add("North", tableHeader);
    add("Center", scrollpane);
}On the other hand, this code works after a fashion but it is not what is needed because it listens to every JTable cell :
public class CCYTable extends JPanel
JTable newtable;
...unbelievably more variable definitions, etc...
public void init()
    //setSize(300,300);
    tableHeader = new JLabel("Bids and Offers", JLabel.CENTER);
    setLayout(new BorderLayout());
    newtable = new JTable(new TableDefinition())
      //Put cell info here, from Oracle CellInfo varchar2
      public String getToolTipText (MouseEvent mevt)
        String info = null;
        java.awt.Point p = mevt.getPoint();
        int rowIndex = rowAtPoint(p);
        int colIndex = columnAtPoint(p);
        int realColIndex = convertColumnIndexToModel(colIndex);
        Object currentValue = getValueAt(rowIndex, colIndex);
        if (realColIndex == 0)
        { if (currentValue.equals(LoC))
          { info = "Click to read general description of our \"" + LoC + "\" service." ;
            if (rowIndex == 0) // HELP: compiles okay but won't specifically select rowIndex == 0 and colIndex == 0
            {this.addMouseListener(new clickListener(newtable, rowIndex, colIndex));
        return info;
      } // end of JComponent's method getToolTipText
     ... lots more code...
// ==============================
class clickListener extends MouseAdapter
    private JTable newtable;
    private int rowIndex;
    private int colIndex;
    public clickListener(JTable newtable, int rowIndex, int colIndex)
      this.newtable = newtable;
      this.rowIndex = rowIndex;
      this.colIndex = colIndex;
    public void mouseClicked(MouseEvent mevt)
      NewFrame = new CCYFrame("blablabla");
}// end of method clickListenerIdeally I should be able to use a selection criteria like this :
java.awt.Point p = mevt.getPoint();
rowIndex = rowAtPoint(p);
colIndex=colAtPoint(p);
if ((rowIndex == 0) && (colIndex == 0)) {//do something}but this is going to be a bad Chrissy for me?

JTable Cell Change Listener

I have a JTable which contains all the services charges and It should automatically calculate the Total of all the service Charges and so my client wants that on JTable Cell Change the total field should be updated
So Can any body give me the event listener for that
Thanks in advance
CSJakharia

Thanks for that
That Works But do u know anything which prevents the continous loop
I mean I have to change certain fields in the JTable itself in the listner itself and if i do that it ends up in Stack Overflow Exception Which implies never ending loop
I can stop that with the use of variable But is there any easy way out I mean any method by which i can stop this endless LOOP

How do I make a JTable's header sorting actually change the actual table?

How do I make a JTable's header sorting actually change the actual table?
Currently, I'm using
table.setAutoCreateRowSorter(true);to allow the user to sort the table.
However, I want to be able to load something based on the selected row's index. The problem is that when the table is rearranged, the change appears to only be local, in other words, the actual table isn't changing.
For instance:
index 0 "A"
index 1 "B"
index 2 "C"
Sorted in reverse gives me
"C"
"B"
"A"
But C is still index 2 (instead of 0).
Thanks in advance.

Cross posted and answered in the Swing forum.
[http://forums.sun.com/thread.jspa?threadID=5353865]
I see this is not your first incidence of cross posting. In future, please post a question once only.
db

JTable Cell Transfer On Table Changed Event

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