The Department of Computer Science & Engineering
STUART C. SHAPIRO: CSE 115 C
Can declare a variable to be of one class,
then make it a reference to an instance of a subclass.
When you send that object a message,
the message will be handled by the method appropriate to the object,
not appropriate to the variable.
See Polymorphism demonstration and its documentation.
Also see the definition and use of
Appetite in Inheritance demonstration and its documentation.