Cell Colors in JTable

Hello ! I have some Tables in my application (jTables) and I need change the color of some rows and cells of the tables, the rows are selected randomly and they can be uncontinues ...
How can I do it ? Thanks.

Have a look at:
http://www2.gol.com/users/tame/swing/examples/

Similar Messages

Change the cell color in JTable?

Hi all,
I'm trying to do that, the user make a selection of multiple cells in a table. And when it press enter, I whant to change the color of the selected cells.(the isEditable of JTable it's already overwritten to return always false)
I have already make my own CellRender, my problem is, because the cell remains unchanged the render are not called...
Thanks,
NeuralC

You need not access this function when you want to paint a cell. This is how your code while instantiating the table should typically look like.
JTable table = new JTable(model);
table.setDefaultRenderer(Object.class,new MyCellRenderer());
and
public class MyTableCellRenderer extends JLabel implements TableCellRenderer
public MyTableCellRenderer
setOpaque(true);
setBackground(Color.white);
public Component getTable.....(JTable table,Object value,......) //fill all these things
setFont(table.getFont());
if(value != null && isSelected)
setHorizontalAlignment(SwingConstants.RIGHT);
setText(value);
return this;
When you set MyTableCellRenderer to the table, the getTableCellRedererComponent method is called automatically to renderer the cells and only the selected cells will be hightlighted in blue color. For a better understanding of how tables work and their corresponding Renderers work, you might have to read the tutorial on JTable. Do that as that would help you in removing all the confusion.
Thanks,
Kalyan

Enter a brief summary here holding the cell color in jtable

Hai every body, I hope someone can rescue me. we r building a standalone application(trading system) for the StockMarket. we r trying to update the watchlist,which displays the market ticks.those who r in this domain can understand this as live streaming.Everything is fine.i could acheive this task.but now my boss has created a problem. he wants the jtable cell to hold the color,once the packet has appeared for that symbol.But currently my system(jtable) holds only the latest color.this can be explained further like this,accoring to the market movement,once the tick has come ,basing on the previous value,say if the value has increased i make the table cell as blue and if the value has decreased the table cell is made red. Now i'm really struggling to hold the colors of the previous ticks.can anyone suggest me a solution for this... i hope someone will come to my rescue... i customized the defaulttablecellrenderer.
thanks in advance regards,
RaviTeja

I think having a custom renderer like this might address your issue.
public Component getTableCellRendererComponent(JTable table,
     Object value, boolean isSelected, boolean hasFocus,
     int row, int col) {
     String oldString = getText();
     if(oldString == null || oldString.length() == 0) {
          oldString = "0.00";
     double oldValue = Double.parseDouble(oldString);
     double newValue = ((Double) value).doubleValue();
     if(oldValue < newValue) {
          //Set desired background and foreground colors.
     else if(oldValue > newValue) {
          //Set desired background and foreground colors.
     else {
          //Set desired background and foreground colors.
     setText(String.valueOf(newValue));
     return null;
}Hope this helps..
Sai Pullabhotla

HELP!! set the cell color in jTable

I need to set the color of a specific cell in jTable, but, I need to retain the old color in the jTable. It must not reset the whole table.
would anyone help me in this problem... PLSSSSS its urgent

A flexible variation on this is to specify formatting options in the JTable's client properties:
// Use some sort of special "key" to indicate the cell and that you want to set the background color
String key = "background:" + row + "," + column;
table.putClientProperty(key, Color.green);You can then write a general table cell renderer that looks for these special formatting options and it doesn't disrupt your existing TableModel in any way:
public class FormattingTableCellRenderer extends DefaultTableCellRenderer
public Component getTableCellRendererComponent(JTable table, Object value, int row, int column, ...)
    Component component = super.getTableCellRendererComponent(table, value, row, column, ...);
    // See if the JTable specifies any properties to override the default format
    Color backgroundColor = (Color)table.getClientProperty("background:" + row + "," + column);
    if(backgroundColor != null)
      component.setBackground(backgroundColor);
    return component;
}Any custom cell renderers you have then simply need to extend FormatTableCellRenderer instead of DefaultTableCellRenderer.
It's very easy to add formatting options other than background, such as font, to the list of recognised attributes. You'll probably need to make some alterations to get it to recognise selection/focus but hopefully you get the idea.
Hope this helps.

Change Cell Color of JTable-Please Help

Hi All,
I want to change the color of a Row in a JTable when i click on it. And After that when i click another row i want to retain this color and give another color to the second row.
If somebody knows how to do this. Do Help
Thanks in advance
-Jeena

Hi,
thanks for the fast reply
Using a TableCellRenderer i was able to give colors to the selected row. But when i click another row the color disappears.
Thanks,
Jeena

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);

Problem when setting JTable cell color.

hello,
when I setting color for particular table cell, it sets.
but, when I click another row (another cell) , the color of the previous cell disabled and it visible only when I click that cells row.
how can I permanatly set the color for the rows depends on input data.
for example,
if a device is connected, I want to give the cell color GREEN.
if device is not connected , i want to give the color as RED.
thank you.

but, when I click another row (another cell) , the color of the previous cell disabled and it visible only when I click that cells row.It appears you applied color to cell editor.
tableObj.getComponentAt(x,y).setForeground(Color.red);
tableObj.getComponentAt(x,y).setBackground(Color.red); or could be solved properl if you post the code

How do I change the colour of text in a cell in a JTable?

I am trying to change the color of the text in a single cell in a JTable. I have tried not adding a cell renderer and it changes the colour of text in all cells.
I have tried adding a cell renderer to the table and it does the same ie all cells text colour changes.
I am able to add a cell renderer to a column and it changes all the cells in the column.
I cannot figure out how to change just one single cell's text colour without effecting the other cells.

Ok, so if i create my own cell renderer do I set it as the default renderer for the whole table i.e.
table.setDefaultRenderer(MyCellRenderer, renderer);
Does this set one cell renderer for the whole table or is there an individual one for each cell?

How to get the default selection color from JTable

Hi, there,
I have a question for how to get the default selection color from JTable. I am currently implementing the customized table cell renderer, but I do want to set the selection color in the table exactly the same of default table cell renderer. The JTable.getSelectionBackgroup() did not works for me, it returned dark blue which made the text in the table unreadable. Anyone know how to get the window's default selection color?
Thanks,
-Jenny

The windows default selection color is dark blue. Try selecting any text on this page. The difference is that the text gets changed to a white font so you can actually see the text.
If you don't like the default colors that Java uses then use the UIManager to change the defaults. The following program shows all the properties controlled by the UIManager:
http://www.discoverteenergy.com/files/ShowUIDefaults.java
Any of the properties can be changed for the entire application by using:
UIManager.put( "propertyName", value );

Set Cell Color without using DefaultTableCellRenderer

Hi,
Is there any possible to set the JTable cell color without using DefaultTableCellRenderer ?. For ex, I have one JTable that having 9 rows and 9 columns. I have to set the cell color in 2nd row & 3rd column.
Please anyone give me guidance to solve this.
Thanks & Regards
S Senthilkumar

Fine.. Please try to understand my points.
Because in my application I have JTable that having 10 columns and rows dynamically will come based on the value fetch from arraylist. If I use DefaultTableCellRenderer, for each record its calling CustomTableCellRenderer(). For example arraylist return 10 rows means its looping 100 times(10 rows * 10 columns).
CustomTableCellRenderrer.java
ArrayList dataLiveMarket = (ArrayList) new CheckUser().getLiveMarketDetails(unval);
CustomTableModel modelLiveMarket = new CustomTableModel(dataLiveMarket);
JTable tableOne = new JTable(modelLiveMarket);
tableOne.setDefaultRenderer(Object.class, new CustomTableCellRenderer());
CustomTableCellRenderrer.java
package com.fxtrading.dao;
import java.awt.Color;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableModel;
* @author user
public class CustomTableCellRenderer extends DefaultTableCellRenderer {
    //private TableModel bidLastPrice;
    //int k;
    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
            boolean hasFocus,
            int row, int column) {
        Component component =
                super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
        if (column == 0 || column == 1|| column == 2) {
            setHorizontalAlignment(SwingConstants.LEFT);
        } else if(column == 3 || column == 4 || column == 5 || column == 6 || column == 7 || column == 8){
            setHorizontalAlignment(SwingConstants.RIGHT);
        }else if(column == 9){
            setHorizontalAlignment(SwingConstants.CENTER);
        // Change cell Color - Started
        bidLastPrice = table.getModel();
        int bidLastRowCount =(int)table.getRowCount();
        for(k=0; k<bidLastRowCount; k++) {
            String bidPrice = (String)bidLastPrice.getValueAt(k,4);
            String lastPrice = (String)bidLastPrice.getValueAt(k,8);
            bidPrice = bidPrice.replace(",","").replace("$","");
            lastPrice = lastPrice.replace(",","").replace("$","");
            if(Double.parseDouble(bidPrice)<Double.parseDouble(lastPrice)){
                if(row == k && column == 4){
                    component.setBackground(Color.RED);
                }else{
                    component.setBackground(Color.WHITE);
                System.out.println("Row Count -->"+k+" Less ----> Bid Price----> "+Double.parseDouble(bidPrice)+" : Last Price----> "+Double.parseDouble(lastPrice));
            }else{
                if(row == k && column == 4){
                    component.setBackground(Color.GREEN);
                }else{
                    component.setBackground(Color.WHITE);
                System.out.println("Row Count -->"+k+" More ----> Bid Price----> "+Double.parseDouble(bidPrice)+" : Last Price----> "+Double.parseDouble(lastPrice));
        // Change cell Color - End
        return component;
}Thanks & Regards,
S Senthilkumar

Cell color from input ... very important

how to convert a string (binary) of 8 bit , i have to put every bit into a cell of a table 2rows � 4columns, and color the background red in bit is 1 and blue if bit is 0...any idea, please is very important

U have to convert your String of bits in a array of bits , and then create a procedure in a for cycle that scans the array and read the value of each postion , and then change the backgroundcolor
However I have a problem to create a JTable and set different Backgrounds color for the cells of my JTable can you show me , how can I do ? a little example
it's very important
Thanks

Getting right end of text displayed in cells of a JTable column

Hey All,
Platform: WinXP, Java 5.0.
I have a simple one-column table whose cells contain pathnames of user-selected files. The pathnames may be quite long, and when they're too long for the fixed width of the column (the containing JFrame is not resizable), I want the trailing (right) end of the pathnames to visible (so the filenames are visible) and for elipsis to be used on the left side (omitting root directory, etc., if need be). I can't figure out how to do this. I've tried many different approaches. Currently I use a class that extends TableCellRenderer, but no combination of alignment settings in this class seems to do the trick.
I've noticed that in the case of JTextFields, this manner of display seems to be the default, no matter what alignment setting I choose. I can't seem to get the desired effect with the display of cells in my JTable though.
Anyone have any suggestions?
Thanks in advance.

Great job camickr,
That did just what I wanted; you get the points for sure! I will say that It's surprising to me that Swing leaves so much work in calculation to be done for this simple idea.
Btw, I also want to mention here that there's another forum issue I raised and you responded to recently, and you never quite answered my question there:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=5160875
That's got 10 pts riding on it too, if you care to revisit the issue...
Thanks very much for the good work on the CellRenderer.

Report Generation broken after deployment - Excel Set Cell Color and Border.vi

Upon deployment, the Excel Set Cell Color and Border.vi became broken. After installing LV2010 SP1 to view the VIs in the deployment, I noticed that in the second case structure where the code draws the border using the BorderAround invoke node, there is an extra variant input parameter named 'Parameters'. Upon right-clicking, an option to 'Relink Invoke Node' appeared and after selecting this, the extra input disappeared and the VI was no longer broken.
Why does "Relink Invoke Node" appear? How do I create a deployment with this issue? Has anybody else experienced this? Why is the TestStand deployment so buggy?

Hi Ching-Hwa,
I have set up a test deployment here where I am deploying a workspace that contains a sequence file. This sequence file has a LabVIEW Action Step calling a VI that opens a new Excel file and simply calls the Excel Set Cell Color and Border VI. After deploying this, both the VI and my test sequence ran on the deployment machine without error. Therefore, I do have some more questions to more accurately reproduce what you are seeing.
First, what operating systems are you developing on and deploying to? Also, what license do you have for TestStand on the machine you are deploying to? If you have a development version, can you manually take the sequence file and VI to this machine and run it? I know you now have LabVIEW 2010 SP1 on your development machine, but if you have the development version of TestStand as well, it would be interesting to see if you copy the files over if you still see this behavior. Are you including the TestStand Engine in the deployment?
Can you open a blank VI on the deployment machine and add the Excel Set Cell Color and Border VI? It would also be interesting to see if this is not a product of the deployment, but rather an issue with something on the deployment machine itself. What version of the Report Generation Toolkit do you have on each machine? Also, what versions of Excel are you using on the development and deployment machine? Again, it would be helpful for me to know exactly what versions you have installed on both the development and deployment machines so that I can reproduce this as accurately as possible.
One last thing to try, too, would be to try deploying the VI by itself just to see if it also has the same behavior. Do you have the Application Builder in LabVIEW? If so, could you also try building an executable from the VI, create an installer, and deploy this to the deployment machine?
In regards to the "freezing" of code by removing the block diagrams, I do not believe this will be a proper work around in this case. While this removes the block diagram from actually being deployed along with the VI and restricts users from editing the code on the deployment machine, if something is getting changed in the compiled code upon deployment, this will not stop this from happening. This option is available more as a memory option to lower the size of the deployment as well as prohibit any users on the development machine from editing the block diagram themselves.
Thanks, Ching-Hwa! I look forward to your response so that I can continue trying to reproduce this issue. Have a great day!
Taylor G.
Product Support Engineer
National Instruments
www.ni.com/support

How do I change the colour of a selected cell in a jTable?

I have a Jtable that displays URL names in one column. There are several problems I'm having. The effect I'm trying to achieve is this:
When the user runs the mouse over the URL name the cursor should change into a hand (similar to what happens in an HTML hyperlink). I'm aware that the Cursor class can set the cursor graphic so i figure that i need a listener of some sort on each cell (so the cursor can change from an arrow to a hand) and also one to indicate when the cursor is not on a cell (so that it can change from a hand back into an arrow). Is this the right track?
Also, I've looked at the DefaultTableCellRenderer class (which, as i understand it, is responsible for how each cell in the jtable is displayed) for a method that will allow me to set the background of a selected cell (or row or column). I require this because each time i select a cell (or row) it becomes highlighted in blue. I would rather it just remained white and changed the cursor to a hand. I know there exists a method for setting the background for an unselected cell but none for a selected cell. Again, I'm not sure if I'm going down the right track with this approach.
Lastly, if the cell has been selected (by a mouse click) the font of the writing in the cell (i.e. The name of the URL) should change. This shouldn't be too much of a problem I think.
I do not expect anyone to provide code to do all of this but some general pointers would be extremely helpful as I do not know if I'm thinking on the right track for any of this. Having some (limited) experience with Swing I doubt there is a simple way to do this but I can only hope!
Thanks.
Chris

http://www2.gol.com/users/tame/swing/examples/SwingExamples.html
there you can find some examples with CellRenderer's and so on ...
have fun

How to get the coordinate of a cell in the jtable?

How to get the coordinate of a cell in the jtable?
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Thanks for help!

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