code: @Override
      public void fillRect(int x, int y, int width, int height) {
          setRect(x, y, width, height);
          fill(this.rect);
      }
docs: Fills the specified rectangle with the current {@code paint}.
  
  @param x  the x-coordinate.
  @param y  the y-coordinate.
  @param width  the rectangle width.
  @param height  the rectangle height.