Problem

(Move the ball) Write a program that moves the ball in a pane. You should define a pane cl...

(Move the ball) Write a program that moves the ball in a pane. You should define a pane class for displaying the ball and provide the methods for moving the ball left, right, up, and down, as shown in Figure 1c. Check the boundary to prevent the ball from moving out of sight completely.

FIGURE 1 (a) Exercise displays four cards randomly. (b) Exercise rotates the rectangle. (c) Exercise uses the buttons to move the ball.

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Solutions For Problems in Chapter 15

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