Java 6 Illuminated: An Active Learning Approach, 2nd Edition

10.7 Programming Activity 2: Using Polymorphism 703

69 public void setY( int newY )

70 {

71 y = newY;

72 }

73

74 /** abstract method for Racer's move

75 */

76 public abstract void move();

77

78 /** abstract method for drawing Racer

79 * @param g Graphics context

80 */

81 public abstract void draw( Graphics g );

82 }

EXAMPLE 10.20 The abstract Racer Class

The Tortoise and Hare classes inherit from the Racer class. Thus, their only

job is to pass constructor arguments to the Racer class and implement the

draw and move methods. For this Programming Activity, we have provided

the Tortoise and Hare classes with the draw and move methods already

written.

Your job is ...