bezier曲线拟合

   protected void onpaint（paintevent e)
   {
      point [] pt = new point[4];
      rectangle rc = this.getclientrect（);
      int right = rc.getright（);
      int bottom = rc.getbottom（);
      
      pt[0] = new point（right / 4, bottom / 2);
      pt[1] = new point（right / 2, bottom / 4);
      pt[2] = new point（right / 2, 3 * bottom / 4);
      pt[3] = new point（3 * right / 4, bottom / 2);
      
      e.graphics.drawbezier（pt);
   }

   protected void onresize（event e)

   {
      this.invalidate（);
   }