How to change the color of a JTable entire row having a particular column value

Question

I have a Jtable which gets populated from an array of values. My code is like this:

  private static final String[] columnNames = {\"Line Number\", \"Error\"         


        

Answer 1

You can create a custom cell renderer. In its implementation, check if percentage value is > 30 for a given row, then highlight this cell.

For example:

class SomeRenderer extends DefaultTableCellRenderer {
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {

        Component c = super.getTableCellRendererComponent(table,
                value, isSelected, hasFocus, row, column);

        if (isHighlightingEnabled){
            Integer percentage = (Integer) table.getValueAt(row, 3);
            if (percentage > 30)
                c.setBackground(Color.RED);
        }
        return c;
    }
}

You may enable/disable this rendering logic upon action if needed.

See Using Custom Renderers for more details.