How to hide grid lines in JTable

Question

I'm trying to hide the grid lines of a JTable but with no results. Even trying to change the color of the grid lines does not work. Here is my code:

    // build the table
tableView = new JTable(ttm);
//Specifify the selection Listener and model
listSelectionModel = tableView.getSelectionModel();
listSelectionModel.addListSelectionListener(new SharedListSelectionHandler(tableView));
tableView.setSelectionModel(listSelectionModel);

//Add a mouse listener to our table and implement double click event
tableView.addMouseListener(new MouseAdapter(){

    public void mouseClicked(MouseEvent e){

        //If double click in a message show the Message Details window
        if (e.getClickCount() == 2){

            showMessageDetail();
            }
    }


} );

// set my own renderer
CustomCellRenderer mtr = new CustomCellRenderer();
tableView.setDefaultRenderer(Object.class, mtr);
// table properties
tableView.setGridColor(Color.black);
tableView.setShowGrid(false);
//tableView.setShowVerticalLines(false);
//tableView.setShowHorizontalLines(false);
tableView.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
//hide header
tableView.setTableHeader(null);
// hide the id column
String columName = tableView.getColumnName(TableModel.COLUMN_ID);
tableView.getColumn(columName).setMaxWidth(0);
tableView.getColumn(columName).setMinWidth(0);
tableView.getColumn(columName).setWidth(0);
//load the messages in the table
loadMessages();
//adjust column width
tableView = autoResizeColWidth(tableView, ttm);


    public class CustomCellRenderer extends JPanel implements TableCellRenderer {
/**
 * First gradient color
 */
private static final Color COLOR_1 = new Color(255, 255, 255, 200);
/**
 * Second gradient color
 */
private static final Color COLOR_2 = new Color(255, 0, 255, 200);
/**
 * Controls gradient direction
 */
private static final float SIDE = 50;

private GradientPaint gradientPaint = new GradientPaint(0, 0, COLOR_1, SIDE, SIDE, COLOR_2, true);

private JLabel label = new JLabel();

    public CustomCellRenderer() {
        setOpaque(true);
        setLayout(new BorderLayout());
        add(label, BorderLayout.CENTER);
        label.setHorizontalAlignment(SwingConstants.CENTER);
    }

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
        label.setText(value.toString());
        return this;
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        g2.setPaint(gradientPaint);
        g2.fillRect(0, 0, getWidth(), getHeight());
    }
    }

White grid lines are always being drawn. I'm stuck here...

Do I have to implement a custom Viewport to get rid of this?

Thanks in advance, Alex

Answer 1

you have to set two thingies

• disable grid showing
• zero row/column intercell spacing

In code:

table.setShowGrid(false);
table.setIntercellSpacing(new Dimension(0, 0));

Or use JXTable (from the SwingX project) which does it for you:

xTable.setShowGrid(false, false);