JTable and Renderer

Question

Hello guru,
I have a JTable in my application and i have defined a renderer for the first column of my
JTable.
This is the code for this renderer
public class LabelRenderer extends JLabel implements TableCellRenderer
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
return this;
I will like to change the background color of the first column and only in the active row of my JTable or ideally set a picture in this column. is this possible?
I think i have to write something in this event:
table.getModel().addTableModelListener(new TableModelListener()
public void tableChanged(TableModelEvent e)
int row = e.getFirstRow();
int column = e.getColumn();
//something .......
How can i do this ?
thank you for your help

Answer 1

Just to add onto that:
1) the method call is setBackground(Color c). not setBackgroundColor.
2) and you'll have to call setOpaque(true) also or the color won't show up. You can do this in your constructor.
Here is some example code to do what you wan. The unimplemented methods at the end should be included in your renderer class. It speeds up renderering a lot. See the java api docs for the reasons if you are curious:
public class DataRenderer extends JLabel implements TableCellRenderer {
private Color selectionColor;
private Color backColor;
public DataRenderer () {
          setOpaque(true);
          setHorizontalAlignment(SwingConstants.RIGHT);     
          selectionColor=new Color(206,207,255);
          backColor = new Color(240,240,240);     
public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int col) {
          if (value==null) //it hasn't been set yet               
               return null;     
     if(isSelected)
     setBackground(selectionColor);
     else
     setBackground(backColor);
     setText(value.toString());
return this;
     public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue){
     protected void firePropertyChange(String propertyName, Object oldValue, Object newValue){
     public void repaint(long tm, int x, int y, int width, int height){
     public void repaint(Rectangle r){
     public void revalidate(){
     public void validate() {
Good Luck!