@Override
 protected void paintComponent(Graphics g) {
   super.paintComponent(g);
   Graphics2D g2 = (Graphics2D) g;
   Insets i = getInsets();
   // int y = g2.getFontMetrics().getHeight()*getLineAtCaret(this)+i.top;
   int y = caret.y + caret.height - 1;
   g2.setPaint(cfc);
   g2.drawLine(i.left, y, getSize().width - i.left - i.right, y);
 }