Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

Programming Exercises 511
FIGURE 13.28 (a) Four panels of geometric figures are displayed in a frame of GridLayout. (b) TicTacToe cells randomly
display X, O, or nothing. (c) Exercise 13.8 draws an octagon.
*13.9 (Create four fans) Write a program that places four fans in a frame of
GridLayout with two rows and two columns, as shown in Figure 13.29a.
*13.10 (Display a cylinder) Write a program that draws a cylinder, as shown in Figure 13.29b.
(a) (b) (c)
FIGURE 13.29 (a) Exercise 13.9 draws four fans. (b) Exercise 13.10 draws a cylinder. (c) Exercise 13.11 draws a diagram
for function f(x) = x 2 .
*13.11 (Plot the square function) Write a program that draws a diagram for the function
(see Figure 13.29c).
Hint: Add points to a polygon p using the following loop:
f(x) = x 2 (a) (b) (c)
double scaleFactor = 0.1;
for (int x = -100; x