我正在圆化我的jtextfield，但圆化后的边缘模糊，看起来不专业。
这是我用来舍入jtextfield的代码。我正在扩展jtextfield并更改paintcomponenet值。

//Rouding the field
     protected void paintComponent(Graphics g) {
         g.setColor(getBackground());
         g.fillRoundRect(0, 0, getWidth()-1, getHeight()-1, 15, 15);
         super.paintComponent(g);
    }
    protected void paintBorder(Graphics g) {
         g.setColor(getForeground());
         g.drawRoundRect(0, 0, getWidth()-1, getHeight()-1, 15, 15);
    }
    public boolean contains(int x, int y) {
         if (shape == null || !shape.getBounds().equals(getBounds())) {
             shape = new RoundRectangle2D.Float(0, 0, getWidth()-1, getHeight()-1, 15, 15);
         }
         return shape.contains(x, y);
    }