Draw a class inheritance diagram for the following set of classes. • Class Goat extends Object and adds a member variable tail and functions milk and jump. Class Pig extends Object and adds a member variable nose and func- tions eat and wallow. • Class Horse extends Object and adds member variables height and color, and functions run and jump. • Class Racer extends Horse and adds a function race. • Class Equestrian extends Horse and adds a member variable weight and functions trot and is Trained.

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Chapter1: Introduction
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Consider the inheritance of classes from Exercise R-2.6, and let a be an
object variable of type Horse. If d refers to an actual object of type Eques-
trian, can it be cast to the class Racer? Why or why not?
Transcribed Image Text:Consider the inheritance of classes from Exercise R-2.6, and let a be an object variable of type Horse. If d refers to an actual object of type Eques- trian, can it be cast to the class Racer? Why or why not?
R-2.6 Draw a class inheritance diagram for the following set of classes.
• Class Goat extends Object and adds a member variable tail and
functions milk and jump.
• Class Pig extends Object and adds a member variable nose and func-
tions eat and wallow.
• Class Horse extends Object and adds member variables height and
color, and functions run and jump.
• Class Racer extends Horse and adds a function race.
Class Equestrian extends Horse and adds a member variable weight
and functions trot and isTrained.
Transcribed Image Text:R-2.6 Draw a class inheritance diagram for the following set of classes. • Class Goat extends Object and adds a member variable tail and functions milk and jump. • Class Pig extends Object and adds a member variable nose and func- tions eat and wallow. • Class Horse extends Object and adds member variables height and color, and functions run and jump. • Class Racer extends Horse and adds a function race. Class Equestrian extends Horse and adds a member variable weight and functions trot and isTrained.
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