Java™ How To Program (Early Objects), Tenth Edition

GUI and Graphics Case Study Exercise

8.1 Extend the program in Figs. 8.17–8.19 to randomly draw rectangles and ovals. Create classes MyRectangle and MyOval. Both of these classes should include x1, y1, x2, y2 coordinates, a color and a boolean flag to determine whether the shape is filled. Declare a constructor in each class with arguments for initializing all the instance variables. To help draw rectangles and ovals, each class should provide methods getupper-leftX, getupper-leftY, getWidth and getHeight that calculate the upper-left x-coordinate, upper-left y-coordinate, width and height, respectively. The upper-left x-coordinate is the smaller of the two x-coordinate values, the upper-left y-coordinate is the smaller of the two y-coordinate ...