Edit Colors of Individual JTable Cells?

Question

I want to make a JTable that has some blank cells for a TV program I'm writing. These blank cells will be the same color as the cells to the left of them. I wrote a ColorCellRenderer to do just this, as shown:
class ColorCellRenderer extends DefaultTableCellRenderer
    Color prevColor = Color.white;
    private Color[] colors = {Color.cyan, Color.yellow, Color.pink, Color.orange};
    public void setCellColor(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column)
        Object presValue = table.getValueAt(row,column);
        if (presValue.equals(""))
            getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column).setBackground(prevColor);
        else if (column > 0)
            getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column).setBackground(colors[column-1]);
            prevColor = colors[column-1];
}Then, in my JTable subclass, I loop through the cells, like this:
ColorCellRenderer ccr;
        for (int i = 0; i < getRowCount(); i++)
            Color prevColor = Color.white;
            for (int j = 1; j < getColumnCount(); j++)
                ccr = (ColorCellRenderer)getColumnModel().getColumn(j).getCellRenderer();
                if (j > 1 && items[i][j].equals("")) {
                    ccr.setCellColor(this, items[i][j], false, false, i, j);
                else {
                    ccr.setCellColor(this, items[i][j], false, false, i, j);
        }And of course I added my ColorCellRenderer to the updateUI() method of this JTable subclass.
The problem is, the JTable seems to only let me have one color per column. Here's what the result looks like:
http://img264.imageshack.us/img264/1397/picture3vt6.png
Anyone know why this is happening?

Answer 1

Nevermind, I misread a doc. I needed to override the getTableCellRendererComponent method. Here's the method, along with a screenshot of the program in all its glory:
class ColorCellRenderer extends DefaultTableCellRenderer
    private Color[] colors = {Color.cyan, Color.yellow, Color.pink, Color.orange};
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                boolean hasFocus, int row, int column)
        if (value.equals(""))
            Color c = colors[column-1];
            switch (column) {
                case 2:
                    c = colors[0];
                    break;
                case 3:
                    c = colors[1];
                    if (table.getValueAt(row, 2).equals(""))
                        c = colors[0];
                    break;
                case 4:
                    c = colors[2];
                    if (table.getValueAt(row, 3).equals("")) {
                        c = colors[1];
                        if (table.getValueAt(row, 2).equals(""))
                            c = colors[0];
                    break;
            super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column).setBackground(c);
        else if (column > 0)
            super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column).setBackground(colors[column-1]);
        else {
            super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column).setBackground(Color.white);
        return this;
}Screenshot:
http://img145.imageshack.us/img145/639/picture4mr4.png
That's it. For some reason the Channels column will not shrink, but I'm sure I'll figure it out.