Custom Cell Renderer issue in Custom JTable

I have CustomeTable extends JTable which renders different UI Components like (JTextField/ ComboBox /JButton/JCheckBox) in *"single column*" so i have overridden *getCellRenderer* and *getCellEditor methods.*
Now my Custom Table changes contextually by selecting different nodes in JTree similar to Windows Explorer
*The problem is Some times When i Click Button & then i click other Node which displays other UIComponents old components (Button is painted) instead of new COmponent(JTextfield or ...)*
*For each UI Renderer i have called its repaint() method still this issue is noticed not frequentlly but yes occasionally.*

Following are some of my Custom Text / Combo Renderer / Password / Button to display different UI Components @ Column 2 as per my above Code
private class MyDefaultRenderer implements TableCellRenderer {
        private JTextField l;
        private Border borderPrevious;
        public MyDefaultRenderer() {
            l = new JTextField();
            borderPrevious = l.getBorder();
        public Component getTableCellRendererComponent(JTable table,
                Object value,
                boolean isSelected,
                boolean hasFocus,
                int row,
                int column) {
            PropertyInfoType propertyType = propertyInfoList.get(row).getType();
            if (ConfigCommonPropertyPanel.isInputEditable && !propertyInfoList.get(row).isReadOnly()) {
            String tempVal = "";
            if (value != null && value instanceof String) {
                tempVal = value.toString();
            l.setText(tempVal);
            l.setOpaque(true);
            l.revalidate();
            l.repaint();
            return l;
        public Object getCellEditorValue() {
            return l.getText();
       private class ButtonRenderer implements TableCellRenderer {
        JPanel buttonPanel;
        JButton button;
        public ButtonRenderer() {
            buttonPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
            button = new JButton(getAdminUIMsg(168));
            buttonPanel.setOpaque(true);
            buttonPanel.add(button);
     public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            button.setFont(LNFManager.getThemeForComponent(table).getBodyText());
            buttonPanel.setPreferredSize(new Dimension(getPreferredSize().width, getRowHeight()));
            buttonPanel.revalidate();
            buttonPanel.repaint();
            return buttonPanel;
    private class ButtonEditor extends JButton implements TableCellEditor, ActionListener {
        int rowIndex;
        int columnIndex;
        JTable table;
        JPanel panel;
        public ButtonEditor() {
            super("Validate Database");
            panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
            addActionListener(this);
        public Component getTableCellEditorComponent(JTable table, Object value,
                boolean isSelected, int row, int column) {
            rowIndex = row;
            columnIndex = column;
            setOpaque(true);
            panel.setOpaque(true);
            panel.setPreferredSize(new Dimension(getPreferredSize().width, getRowHeight()));
            setFocusable(true);
            panel.repaint();
            panel.add(this);
            return panel;
        public Object getCellEditorValue() {
            return this.isSelected();
        public boolean isCellEditable(EventObject anEvent) {
            return true;
        public boolean shouldSelectCell(EventObject anEvent) {
            return true;
        public boolean stopCellEditing() {
            return true;
        public void cancelCellEditing() {
        public void addCellEditorListener(CellEditorListener l) {
        public void removeCellEditorListener(CellEditorListener l) {
        public void actionPerformed(ActionEvent e) {
                          try{
// Some Business Logic To check my Database / LDAP Connections on Button Click
                             }catch( Exception ex){
                              } finally{
                                        stopCellEditing();
                                        transferFocus();
               +Shouldnt i call repaint() on a specific Component for a Specific renderer ?+
My Code works perfectly 99 % of the times ..
But very rarely when i click My Button On my Custom Table say
When i click NODE A - which displays different UI in Right Split Info
Row 2 Column 2 - has Validate Button
Then i Click NODe B - Which displayes Contextual UI Components
Row 2 Column 2 should display TextBox (as expected)
but due to some rendering issue its Displaying same Validate Button
I have debugged and verified my logic to call renderer is perfect.
My rest of rows /columns displays appropriate UI Components except the
position of Button .
I think after my Button Editor is Invoked & i perform some business logic Button renderer is not getting invoked ???

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Hello, all,
I have the following task: I need to select several cells in a column, change the value of those cells, and once the value changes, the color of these cells should change as well. I wrote a custom cell renderer, and registered it for the object type that will use it to render the cell. However, the custom cell renderer is never called. Instead, the class name of the object is displayed in the cell.
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} Please, help,
Thank you!
Elana

The suggestion given above assumes that all the data in a given column is of the same type.
If you have different types of data in different rows the you should be overriding the getCellRenderer(...) method. Something like:
public TableCellRenderer getCellRenderer(int row, int column)
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Custom Cell Renderer and JTable

Hello all,
here is what i am trying to do. i want that when a user clicks on a cell the
color of the cell should change to say red. when the user clicks on the other
cell the red color in the first cell should remain.
the way i am trying do to this is by making an object which contains an on and
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based on the row and column i change the value of the boolean state on. my
custom cell renderer checks whether the state is on or off
and then changes the color.
rightnow I am able to change the color on click but am unable to retain the
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You problem is that you are NOT setting the clickedState of your object:
public Component getTableCellRendererComponent(JTable table, Object value,                                                       boolean isSelected, boolean hasFocus, int row, int column) {                         CellColorObject myObj = (CellColorObject)value;          this.setText(value.toString());                         System.out.println("value.getClickedStatus() " + myObj.getClickedState());               if(myObj.getClickedState()){                    System.out.println("in 2");                         this.setBackground(Color.PINK);               }               if(isSelected){               System.out.println("in 1");               this.setSelected(true);In the above, you have
if (myObject.getClickedState())
/// do code..
notice you have:
if (isSelected)
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Maybe I am missing something, but I see no code that sets your objects clicked state when selected. My guess is that you should be doing value.setClickedState(true) when the thing is selected, something like:
CellColorObject myObj = (CellColorObject)value;
if (isSelected)
myObj.setClickedState(true);
else
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BUT, you didn't finish your code snippet within the method there, so perhaps you do this already?
What you have should almost work, in that every single cell will call this method and if the object's clickedState is true, it should set the background color. Just make sure you are setting the objects clicked state.

Event Handling in JTable Custom Cell Renderer

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Hello,
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Subject -- Sender -- Date hidden rec id color
Hello Pete Jan 15, 2003 2900 blue
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Hi,
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Can anyone giveme a hint ?
Thanks!!

OK! Now the performance problem is gone!! (I don't know why, I didn't touch a thing)
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Help with JTreeTable custom cell renderer!

Hi.
I've followed diligently the complete TreeTable2 example found on the Sun site. http://java.sun.com/products/jfc/tsc/articles/treetable2/
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Here are links to screenshots of my progress, or lack thereof:
Original Working TreeTable II
http://www.pharmalytix.com/original_treetable.jpg
My Not-working Tree Table II w/ Custom Cell Renderer
http://www.pharmalytix.com/customtablecellrenderer_treetable.jpg
thanks again - !!

phew! finally got this sucker working. I had to retrieve the default rendererer of my TreeTable's TreeTableModel class column, which is the JTree and then, in its component-form, start mucking about with its stylings. The real black-hole of progress was caused by my brain imploding from not being able to understand that a "Component" was what represented the "thing" whose behaviour I wanted to alter, be it a Jtree node or Jtable cell.
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                    Component comp = treeTable.getDefaultRenderer(TreeTableModel.class).getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
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http://www.pharmalytix.com/alternateshading_treetable.jpg
Edited by: DataHog on Nov 6, 2007 10:21 AM

Inconsistent behavior with Custom Cell Renderer

I have two questions:
Questions # 1.
I have created a custom cell renderer for my JTable that changes color if the text property changes and the text contains the letter 'S'. Like
so:
class SchedRenderer extends DefaultTableCellRenderer{
public SchedRenderer(){
super();
final Color c = scSelfCont.panelbg;
this.setForeground(c);
this.addPropertyChangeListener("text",new PropertyChangeListener(){
public void propertyChange(PropertyChangeEvent e){
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     if(text.charAt(i)=='S'){
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99% of the time it works just fine. But occasionally the cell will revert back to its original color, and then back to the correct color after clicking somewhere entirely different. I set some breakpoints in the property change handler and it gets called quite frquently even if no change has been made. At first I thought this was a JDK bug, but I am now convinced that there simply must be a better way to do this, any ideas?
Question # 2:
Is there a simple way to change the color of an entire row without selecting it? Currently I am using Custom Cell Renderers to change
colors of cells, but it seems like such an obtuse method. Is there a better way?
Thanks in advance.
Adrian Calvin

I have two questions:
Questions # 1.
I have created a custom cell renderer for my JTable that changes color if the text property changes and the text contains the letter 'S'. Like
so:
class SchedRenderer extends DefaultTableCellRenderer{
public SchedRenderer(){
    super();
    final Color c = scSelfCont.panelbg;
    this.setForeground(c);
    this.addPropertyChangeListener("text",new PropertyChangeListener(){
       public void propertyChange(PropertyChangeEvent e){
     boolean foundS=false;
     String text=e.getNewValue().toString();
     for(int i=0;i<text.length();i++)
       if(text.charAt(i)=='S'){
         foundS=true;
         break;
     if(foundS){
       SchedRenderer.this.setBackground(Color.red);
       SchedRenderer.this.setForeground(Color.red);
     else{
       SchedRenderer.this.setBackground(c);
       SchedRenderer.this.setForeground(c);
[\code]
99% of the time it works just fine. But occasionally the cell will revert back to its original color, and then back to the correct color after clicking somewhere entirely different. I set some breakpoints in the property change handler and it gets called quite frquently even if no change has been made. At first I thought this was a JDK bug, but I am now convinced that there simply must be a better way to do this, any ideas?
Question # 2:
Is there a simple way to change the color of an entire row without selecting it? Currently I am using Custom Cell Renderers to change
colors of cells, but it seems like such an obtuse method. Is there a better way?
Thanks in advance.
Adrian Calvin

JTree custom cell renderer question

When using a custom cell renderer is their anyway to tell the offset of the current node?
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Parent
|----Child 1
|----Child 2
|----Child 3
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I have a JTree as a scrollpane rowHeader. While the main body of the scrollpane is a JTable. I need the tree's nodes to fill the entire width so that it looks like part of the table. I figure the row header width - current node offset should be the width that I will need each node to be. Any help is welcome. Thanks.

the renderer tells you the row, the tree can get you a treepath for a row
TreePath getPathForRow(int row)
That can tell you the depth of the node.

TableSorter + custom cell renderer: how to get DISPLAYED value?

Hi!
I have a JTable with a custom cell renderer. This renderer translates numerical codes, which are stored in the table model, into textual names. E.g. the table model stores country codes, the renderer displays the name of the country.
Now, having a reference on the JTable, how can I get the DISPLAYED value, i.e. the country name? Is there some method like ....getRenderer().getText()?
Thanx,
Thilo

Well, a renderer can be anything. It may be rendering an image not text so you can't assume a method like getText(). However, since you know the component being used to render the cell you should be able to do something like:
TableCellRenderer renderer = table.getCellRenderer(row, column);
Component component = table.prepareRenderer(renderer, row, column);
Now you can cast the component and use get text.
Another option would be to store a custom class on the table cell. This class would contain both the code and value. The toString() method would return the value. Whenever you want the code you would use the table.getValueAt(...) method and then use the classes getCode() method. Using this approach you would not need a custom renderer. This thread shows how you can use this approach using a JComboBox, but the concept is the same for JTable as well:
http://forum.java.sun.com/thread.jsp?forum=31&thread=417832

Custom Cell Renderer for JList

I'm getting some strange behaviour from my custom cell renderer.
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
public class TestRenderer implements ListCellRenderer {
private JPanel jpCell = new JPanel();
public Component getListCellRendererComponent
      (JList list, Object value, int index, boolean isSelected,
       boolean cellHasFocus) {
    jpCell.add(new JLabel("Render"));
    return jpCell;
import javax.swing.*;
import java.awt.*;
public class TestPanel extends JFrame {
     public TestPanel() {
          JList jlst = new JList(new String[]{"Value", "Value2", "Value3"});
          jlst.setCellRenderer(new TestRenderer());
          JPanel panel = new JPanel();
          panel.add(jlst);
          add(panel);
     public static void main(String[] args) {
          TestPanel frame = new TestPanel();
          frame.setSize(300, 300);
          frame.setLocationRelativeTo(null);
          frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
          frame.setVisible(true);
}As you will see the renderer displays the string several times in each cell depending on which layout manager I use. However, if I replace the JPanel with a JLabel and set the String as text on the label the String is only printed once per cell. I can't see to find the reason for this.
Edited by: 811488 on 18-Nov-2010 09:44
Edited by: 811488 on 18-Nov-2010 09:45
Edited by: 811488 on 18-Nov-2010 09:45

So getListCellRendererComponent returns a component whose paintComponent method is called with the Graphics object of the JList Yes, except that the paint(...) method is called. There is a difference. paintComponent() only paints the component. In the case of a JPanel you would get a boring gray colored component. paint() will paint the component and its children and the Border of the component as well. So you get a much more exiting component.
Read the section from the Swng tutorial on [url http://download.oracle.com/javase/tutorial/uiswing/painting/index.html]Custom Painting for more information.
So the state of the cell is not the state of the cell Renderer Component meaning the image rendered onto the cell only reflects the state of the Cell Renderer Component at the time the cell was rendered.Yes which is why this method should be efficient because repainting is consistently being done for all the cells. For example every time row selection changes multiple rows need to be repainted. Think of this same concept when you use a JTable which also contains multiple columns for each row.
That is why you should not be adding/removing components in the rendering code.
It makes sense except that if this was the case the first version of the Render that I posted should have been rendered first with one "Render" then two then three, shouldn't it?Yes, except that you can't control when or how often the rendering is done. Add the following to the renderer:
System.out.println(index + " : " + jpCell.getComponentCount());You will see that rendering is done multiple times. The JList tries to determine its preferred width. To do this it loops through all the items in the list and invokes the renderer to get the width of the largest renderer. Well the largest width is the last renderer because 3 labels have been added to the panel. So that width becomes the preferred width of the list. Then the GUI is displayed and the list is painted. Every time the renderer is called an new label is added, but after the 3rd label there is no room to paint the label so it is truncated.
Change your code to the following:
//add(panel);
add(jlst);Now change the width of the frame to see what happens.
Given all the help you have received, I expect to see many "helpfull answers" selected as well as a "correct answer" (if you want help in the future that is).

Custom Cell Renderer issue in Custom JTable

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