Introduction to Parameters and Objects - Building Java Programs: A Back to Basics Approach - page 222

Programming Projects

1. Write a program that draws the patterns shown in Figure 3G.28 onto a DrawingPanel .

Figure 3G.28

The drawing panel's size is 400 400 pixels and its background color is cyan. It contains four figures of concentric

yellow circles with black outlines, all surrounded by a green rectangle with a black outline. The four figures on your
drawing panel should have the properties shown in Table 3G.7.

×

Table 3G.7 Circle Figure Properties

Number Number of

Description ( x , y ) position Size of subfigures of circles rows/cols

top left (0, 0) 100 × 100 5 1 × 1

bottom left (10, 120) 24 × 24 4 5 × 5

top right (150, 20) 40 × 40 5 6 × 6

bottom right (130, 275) 36 × 36 3 3 × 3

Break down your program into methods for drawing one subfigure as well as larger grids of subfigures, such as the
5

× 5 grid at (10, 120).

2. Write a program that draws the image shown in Figure 3G.29 onto a DrawingPanel of size 200 × 200. Each stamp

is 50 × 50 pixels in size.