JTable TableCellRenderer无法正确着色

Question

I have created a simple JTable with my custom DefaultTableCellRenderer . On its own it is working fine (coloring last column). But as soon as I select a row OR filter/unfilter it, the row is colored, even if it shouldn't be colored at all.

My renderer:

public class StatusCellRenderer extends DefaultTableCellRenderer {
    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
            int row, int col) {
        Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus,
                table.convertRowIndexToModel(row), col);
        DataTableModel model = (DataTableModel) table.getModel();
        String data = model.getValueAt(table.convertRowIndexToModel(row), col).toString();
        if (col == 3 && data.equalsIgnoreCase("successful") && !data.isEmpty()) {
            c.setBackground(Color.GREEN);
        }
        if (col == 3 && !data.equalsIgnoreCase("successful") && !data.isEmpty()) {
            c.setBackground(new Color(255, 51, 51));
        }
        return c;
    }
}

How it initially looks (and how it always should look):

And after selecting 2 rows (the top and bottom one):

As you can see, there are a few rows GREEN, which shouldn't be colored at all. Whats even more disturbing is the fact that I only selected the top and bottom row of the green block, which means that it automatically also colors the rows in between.

How can I stop this behavior and only color the rows as shown in the first picture?

---

The accepted answer helped me very much to overcome the issues and this is the final code:

public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
        int row, int col) {
    Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus,
            table.convertRowIndexToModel(row), table.convertColumnIndexToModel(col));
    DataTableModel model = (DataTableModel) table.getModel();
    String data = model.getValueAt(table.convertRowIndexToModel(row), table.convertColumnIndexToModel(col))
            .toString();
    if (!isSelected) {
        if (col == 3 && data.equalsIgnoreCase("successful") && !data.isEmpty()) {
            c.setBackground(Color.GREEN);
        } else if (col == 3 && !data.equalsIgnoreCase("successful") && !data.isEmpty()) {
            c.setBackground(new Color(255, 51, 51));
        } else {
            c.setBackground(Color.WHITE);
        }
    } else {
        c.setBackground(c.getBackground());
    }
    return c;
}

It colors blue if the cell is selected and if not, then it colors WHITE, GREEN or RED depending on the value

Answer 1

Since the renderer component will be re-used, consider setting a default color when no condition match :

    if (col == 3 && data.equalsIgnoreCase("successful") && !data.isEmpty()) {
        c.setBackground(Color.GREEN);
    }
    else if (col == 3 && !data.equalsIgnoreCase("successful") && !data.isEmpty()) {
        c.setBackground(new Color(255, 51, 51));
    }
    else {
        c.setBackground(Color.GRAY.brighter());
    }