Changing the color of the column in a JTable based on the selection (mouse)

Question

Hi,
I want to change the color of all the cells in a column based on the mouse clicked event.
I have managed to select the entire column. And, even, I have found a working example in the internet. But I don't understand why in my case it doesn't work.
This is the code (an inner class for a TableCellRenderer):
class MCTableCellRenderer extends JLabel implements TableCellRenderer {
          private static final long serialVersionUID = 1L;
          @Override
          public Component getTableCellRendererComponent(JTable table,
                    Object value, boolean isSelected, boolean hasFocus, int row,
                    int column) {
               setFont(table.getFont());
               if(value instanceof Double){
                    setHorizontalAlignment(SwingConstants.RIGHT);
                    DecimalFormat numberFormat = (DecimalFormat) NumberFormat.getInstance();
                    numberFormat.applyPattern("#######.#");
                    String val = numberFormat.format(value);
                    setText(val);
               if(isSelected){
                    setBackground(Color.RED);
                    System.out.println("is selected");
               else{
                    setBackground(Color.BLACK);
                    System.out.println("is not selected");
               return this;
    }I have set opacity to true for the contentPane, but without any result.
Any advice will be very apreciated.

Answer 1

Problem solved.
My Renderer should have extended the abstract class DefaultTableCellRenderer.
class MCTableCellRenderer extends DefaultTableCellRenderer {