如何在JTable中隐藏网格线

我正在尝试隐藏JTable的网格线，但没有结果。即使尝试更改网格线的颜色也不起作用。这是我的代码：

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

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

private JLabel label = new JLabel();

    public CustomcatellRenderer() {
        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,getWidth(),getHeight());
    }
    }

始终绘制白色网格线。我被困在这里&Hellip;

我是否必须实现自定义视口才能摆脱这种情况？

预先感谢，亚历克斯