
10.8 Interfaces 707
Figure 10.16
Another Run of the Race
10.8 Interfaces
In Java, a class can inherit directly from only one class, that is, a class can
extend only one class. To allow a class to inherit behavior from multiple
sources, Java provides the interface.
An interface typically specifies behavior that a class will implement. Inter-
face members can be any of the following:
■
classes
■
constants
■
abstract methods
■
other interfaces
DISCUSSION QUESTIONS
1. Explain how polymorphism simplifies this application.
2. If you wanted to add another racer,for example,an aardvark,explain what code you
would need to write and what existing code,if any,you would need ...