*15.3 (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 15.26c. Check the bound- ary to prevent the ball from moving out of sight completely. Exercise15 02 OExercise15_03 B回X 14 42 Rotate Left Right Up Down Fabods

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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*15.3 (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 15.26c. Check the bound-
ary to prevent the ball from moving out of sight completely.
C Exercise15_02 DX
E回X
Exerdse15_03
14 4:
Left Right
Up
Rotate
Down,
(a)
(b)
(c)
FIGURE 15.26 (a) Exercise 15.1 displays four cards randomly. Source: Fotolia. (b) Exercise 15.2 rotates the rectangle.
(c) Exercise 15.3 uses the buttons to move the ball.
Transcribed Image Text:*15.3 (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 15.26c. Check the bound- ary to prevent the ball from moving out of sight completely. C Exercise15_02 DX E回X Exerdse15_03 14 4: Left Right Up Rotate Down, (a) (b) (c) FIGURE 15.26 (a) Exercise 15.1 displays four cards randomly. Source: Fotolia. (b) Exercise 15.2 rotates the rectangle. (c) Exercise 15.3 uses the buttons to move the ball.
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