Vector a content of a JTable cell

I seee that you can put object into a cell in a JTable such as Integer and Boolean. Is it possible to put a vector in the cell and then use a custom cell renderer to display that vector graphically. I would very much appreciate a quick example!!!
Thanks - happy new year lets hope its a better one

I have looked there but didnt really understand it to well. I have a cellrenderer that draws the appropriate stuff but not based upon the value in the cell. Is it to do with the getColumnClass methods? If so what do I need to put in my table model and how does the renderer know?
Thanks

Similar Messages

Different jpopup menus items depending on content in a Jtable cell

Hi,
Is it possible if a popup menu have different items in it, depending on the content of a jtable cell??
I would be greatful if any one could point me in the right direction.
Thanks
Venus

In the mouse listener where you are displaying the popup, change it as appropriate before displaying it.

JTable cell content width

I have a JTable (actually it's a JXTreeTable but I don't think that matters), and I want to find the coordinate of the right side of the content in the furthest column to the right. Not the bounds of the cell, the bounds of the contents (text) of that cell. Same thing for the left side.
Put another way, I want to get the bounds of the contents of a row--not the whole row, but the actual text contents.
We were doing this for JTree and it was working by just getting JTree.getPathBounds(), but for a table, getting the cell bounds gets the size of the entire cell, not just the contents.
Thanks!

You could probably use the table.prepareRenderer(...) metthod to get the component doing the renderering and then get the preferred size of that component.

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.

How to write an element in a JTable Cell

Probably it's a stupid question but I have this problem:
I have a the necessity to build a JTable in which, when I edit a cell and I push a keyboard button, a new Frame opens to edit the content of the cell.
But the problem is how to write something in the JTable cell, before setting its model. Because, I know, setCellAT() method of JTree inserts the value in the model and not in the table view. And repainting doesn't function!
What to do??
Thanks

Hi there
Depending on your table model you should normally change the "cell value" of the tablemodel.
This could look like:
JTable table = new JTable();
TableModel model = table.getModel();
int rowIndex = 0, columnIndex = 0;
model.setValueAt("This is a test", rowIndex, columnIndex);
The tablemodel should then fire an event to the view (i.e. JTable) and the table should be updated.
Hope this helps you

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.

I failed to color JTable cells

Hello,
I'm trying to set the background color of JTable cells based on their content.
For example if I edit a cell and put a R, I'd like to paint the background in Red.
If I enter B, I want it becomes Blue, and so on.
I tried to use a few examples found in various fora, but all failed.
in addition, I do not understand why I should extend JLabel and not another Class ?
Thanks for help.
Here is a sample code (in which all cells should become red whatever is typed in).
import javax.swing.table.*;
import javax.swing.*;
public class TableRenderer extends JLabel implements javax.swing.table.TableCellRenderer {
public java.awt.Component getTableCellRendererComponent
    javax.swing.JTable table,
   Object value,
   boolean isSelected,
   boolean hasFocus,
   int row,
   int column
     setBackground(java.awt.Color.red);   // for the moment All cells will be red
     return this;
   mytable = new javax.swing.JTable(5,5);
   TableColumn[] column = new TableColumn[5];
   TableColumnModel colModel = mytable.getColumnModel();
   for (int i=0; i <5 ;i++)
                column[i] = colModel.getColumn( i );
                column.setCellRenderer(new TableRenderer());

Finally after many tries I found a good way to do what I wanted.
If some people are interested, here is the code.
import java.awt.*;
import javax.swing.table.*;
import javax.swing.*;
class MyClass
public class TableRenderer extends javax.swing.table.DefaultTableCellRenderer
public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column)
     Component xx = super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
        String val = (String) table.getValueAt(row, column);
        if (gegeutil.Gegetools.isEmpty(val)) super.setBackground(Color.white);
        else if(val.equals("Tournament")) super.setBackground(Color.red);
          else if(val.equals("Class"))super.setBackground(Color.orange);
          else if(val == "")           super.setBackground(Color.white);
        else super.setBackground(Color.blue);
               return xx;
public TableRenderer() {
     super();
JTable table = new JTable(nbrow, nbcolumn);
table.setDefaultRenderer(Object.class, new TableRenderer());
}

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.

JTable cell under Mouse positin?

I have a need to update a control with information about a JTable cell that is currently under the Mouse pointer.
No clicking, just moving the mouse around updates the other control with information depending on which cell is currently under the Mouse pointer.
How Can I translate a mouse position into a row,col for the cell?

Generally I assume these kinds of problems are either obvious problems in my code (at least, obvious to other people) or obscure interactions that are are royal PITA to track down.
Apparently not in this case.
* TestJTable.java
* Created on Sep 14, 2010, 9:41:09 PM
package testthing;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
* @author jlussmyer
public class TestJTable extends javax.swing.JFrame {
    /** Creates new form TestJTable */
    public TestJTable() {
        initComponents();
    /** 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.
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        jScrollPane1 = new JScrollPane();
        tblTest = new JTable();
        lblInfo = new JLabel();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        tblTest.setModel(new 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"
        tblTest.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent evt) {
                tblTestMouseClicked(evt);
        jScrollPane1.setViewportView(tblTest);
        lblInfo.setText("jLabel1");
        GroupLayout layout = new GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(Alignment.LEADING)
            .addComponent(lblInfo, GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
            .addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
        layout.setVerticalGroup(
            layout.createParallelGroup(Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jScrollPane1, GroupLayout.PREFERRED_SIZE, 275, GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(ComponentPlacement.RELATED)
                .addComponent(lblInfo)
                .addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        pack();
    }// </editor-fold>
    private void tblTestMouseClicked(MouseEvent evt) {
        String txt = evt.getPoint().x + "," + evt.getPoint().y;
        int row = tblTest.rowAtPoint(evt.getPoint());
        Point pt = new Point(evt.getPoint());
        do {
            pt.y--;
        } while (tblTest.rowAtPoint(pt) == row);
        lblInfo.setText(txt + " row=" + row + ", pt.y=" + pt.y + ", " + tblTest.rowAtPoint(pt));
        return;
     * @param args the command line arguments
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TestJTable().setVisible(true);
    // Variables declaration - do not modify
    private JScrollPane jScrollPane1;
    private JLabel lblInfo;
    private JTable tblTest;
    // End of variables declaration
}

JTable cell render problem, help!

Hi all,
I'm trying to change the color of some cells in a JTable. I have the definition of what cell to render in a different color in a Vector. So each time the cell render is called, I check if the cell it's in my vector, and if yes I change the background color to red.
The problem is, the result are not the desired, some cells are some times in red other times in red! Some one have an idea of what appends?
Thanks NeuralC
public Component getTableCellRendererComponentJTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent( table, value, isSelected, hasFocus, row, column);
for(int i=0;i<((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.size();i++){
if(((column)>=((Gama)((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.elementAt(i)).inicio) & ((column) <=((Gama)((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.elementAt(i)).fim)){
cell.setBackground(Color.red);
return cell;
cell.setBackground(Color.white);
return cell;
}

Hi,
AND symbol is &, and I must use it.
I haved solved the problem, extending my cell render to a JLabel. With this and making my self the selection color everything works fine.
Thanks for interrest.
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
JLabel lb = new JLabel((String)value);
//Component cell = super..;
setText((String)value);
if(!isSelected){
setBackground(Color.white);
else{
setBackground(Color.blue);
for(int i=0;i<((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.size();i++){
if(((column)>=((Gama)((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.elementAt(i)).inicio) & ((column) <=((Gama)((LinhaRefresh)RefreshOjb.elementAt(row)).Gamas.elementAt(i)).fim)){
if(hasFocus){
setToolTipText("est� dentro"+column);
setBackground(Color.red);
return this;

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?

Indeterminate JProgressBar inside JTable cell

I am able to put a JProgressBar inside a JTable cell, via a custom renderer to do so, however, I am unable to make the progress bar show the indeterminate animation. Any ideas? I calledbar.setIndeterminate( true ); and it doesn't seem to want to show. Is the JTable preventing it?
(should I include more of my code?)

Your JProgressBar is used to render the table cell only when that cell of the JTable needs to be rendered and the JProgressBar has no say in this.
I don't know why you would want to do this but to do this I would set up timer that fired a tree model event to say that the content of the cell had changed. This would trigger the cell to be re-painted. I think, but I can't be sure, that you will not be able to use
bar.setIndeterminate( true );
You may have to craft your own progress bar to make this easy.

JButton "sticking" in a JTable Cell

So I've modified the renderer and what not and slapped a button into a JTable Cell. The assignment requires it to turn red/green altrenativly when pressed. It works perfectly aside from the fact that the buttons appear to not "bounce back" when they switch colors. (i.e. They appear depressed when red and pressed when green). The code is below. any ideas?
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.JButton;
public class ButtonTableModel extends AbstractTableModel {
     private static final long serialVersionUID = 1;
     private Object[][] rows = new Object[2][1];
     private String[] columns = new String[1];
     public ButtonTableModel() {
          for(int k = 0; k < rows.length; k++) {
               JButton button3 = new JButton("222");
               button3.setSize(200, 200);
               button3.setBackground(Color.red);
               button3.addMouseListener(new ColorChanger(button3));
               rows[k][0] = button3;
          /*button = new JButton("Test Button");
          button.setBackground(Color.red);
          button.addMouseListener(new ColorChanger(button));
          button2 = new JButton("asdf");
          button2.setBackground(Color.red);
          button2.addMouseListener(new ColorChanger(button2));
          rows[0][0] = button;
          rows[1][0] = button2;*/
     private class ColorChanger implements MouseListener {
          private JButton callingButton; //Stores the button that added the Listener
          public ColorChanger(JButton pCallingButton) { //Constructs a ColorChanger that stores a given JButton
               callingButton = pCallingButton;
          public void mouseClicked(MouseEvent e) { //When callingButton is clicked, its color changes alternativly to green/red
               if(isGreen(callingButton) == false)
                    callingButton.setBackground(Color.green);
               else
                    callingButton.setBackground(Color.red);
          //The 4 methods below are unused leftovers specified by the MouseListener Interface
          public void mouseEntered(MouseEvent arg0) {
          public void mouseExited(MouseEvent arg0) {
          public void mousePressed(MouseEvent arg0) {
          public void mouseReleased(MouseEvent arg0) {
     private boolean isGreen(JButton pButton) { //Returns true if a button's background is green, false otherwise
          if(pButton.getBackground() == Color.green)
               return true;
          return false;
     public int getColumnCount() { //Returns the number of Columns in a table
          return columns.length;
     public int getRowCount() { //Returns the number of rows in the table
          return rows.length;
     public String getColumnName(int pCollumnIndex) { //Returns the name of the collumn
          return columns[pCollumnIndex];
     public Object getValueAt(int pRow, int pColumn) { //Returns the value at given table coordinates
          return rows[pRow][pColumn];
     public boolean isCellEditable(int pRow, int pColumn) { //Returns true if a cell at given coordinates is editable, false otherwise
              return false;
     public Class getColumnClass(int pColumnIndex) { //Retrieves the class of the objects in a column
          return getValueAt(0, pColumnIndex).getClass();
import java.awt.Color;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JTable;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.table.TableCellRenderer;
public class JButtonJTableTest extends JFrame {
     private static final long serialVersionUID = 1;
     private JTable table;
     private TableCellRenderer tableCellRenderer;
     private MouseEvent e2;
     private Class columnClass;
     private JButton button;
     private Point mousePos;
     private int mouseRow, mouseColumn;
     public JButtonJTableTest() {
          super("JButton Table Test");
          table = new JTable(); //Setup the table, assigning the new renderer and model
          tableCellRenderer = table.getDefaultRenderer(JButton.class);
          table.setDefaultRenderer(JButton.class, new JButtonRenderer(tableCellRenderer));
          table.setModel(new ButtonTableModel());
          table.setGridColor(Color.blue);
          table.addMouseListener(new MouseForwarder());
          table.setShowGrid(true);
          add(table); //Add the table to the content pane
     private class MouseForwarder implements MouseListener {
          public void mouseClicked(MouseEvent e) {
               mousePos = new Point(e.getX(), e.getY()); //Assing mouse coordinates to a point data structure
               mouseRow = table.rowAtPoint(mousePos); //Ascertain the mouse's row & column
               mouseColumn = table.columnAtPoint(mousePos);
               if(mouseRow == -1 || mouseColumn == -1) //Ensure that the column is within the table
                    return;
               columnClass = table.getColumnClass(mouseColumn); //Ascertain the column's class
               if(columnClass != JButton.class) //If the class is not JButton, exit MouseForwarder
                    return;
               button = (JButton)table.getValueAt(mouseRow, mouseColumn); //Access the button where the mouse clicked
               e2 = (MouseEvent)SwingUtilities.convertMouseEvent(table, e, button); //Forward click to button
               button.dispatchEvent(e2); //Have button take action
               table.repaint(); //Repaint the table to ensure proper button animation
          //The 4 methods below are unused methods from the MouseListener Interface
          public void mouseEntered(MouseEvent arg0) {
          public void mouseExited(MouseEvent arg0) {
          public void mousePressed(MouseEvent arg0) {
          public void mouseReleased(MouseEvent arg0) {
     public static void main(String[] args) { //Setup and run the window
          JButtonJTableTest test = new JButtonJTableTest();
          test.setSize(300, 300);
          test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          test.setVisible(true);
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
public class JButtonRenderer implements TableCellRenderer {
     private TableCellRenderer defaultRenderer;
     private Component jTableButton;
     public JButtonRenderer(TableCellRenderer pRenderer) {
          defaultRenderer = pRenderer;
     public Component getTableCellRendererComponent(JTable pTable, Object pButton, boolean isSelected,
                                                                 boolean hasFocus, int pRow, int pCollumn) {
          try {
               jTableButton = (Component)pButton;
               return (Component)pButton;
          catch(ClassCastException exception) {
               return defaultRenderer.getTableCellRendererComponent(pTable, pButton, isSelected,
                    hasFocus, pRow, pCollumn);
}

This question was crossposted into the Swing forum and should be answered there as that is the correct location for it http://forum.java.sun.com/thread.jspa?threadID=753812

Resizing the JTable Cell horizontal width

Sir/Madam,
How can i resize the JTable cell's horizontal width. I know the JTable's column width can be resized. I dont want to resize the entire JTable column. But i need to resize individual JTable cell's horizontal width. Thanks in advance.

I think that's not possible. What kind of results are you expecting ? If the cells of a column are different widths, what are you going to do with the extra space of the narrower cells ?
What are you displaying in the cells ? Maybe you can narrow the contents of the cells, and not the cells.

Vector a content of a JTable cell

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