Challenge: Model a Simple Inheritance Hierarchy
Recap: Inheritance, Visibility, and Overriding
You have learned that inheritance allows you to create a new class based on an existing one, using the extends keyword. This lets you reuse code and build logical relationships between classes. Visibility keywords—public, private, and protected—control which properties and methods are accessible from outside or inside the class and its subclasses. Method overriding lets a subclass provide its own implementation of a method defined in its parent class.
You are now ready to apply these concepts by modeling a simple class hierarchy representing animals and their behaviors.
Swipe to start coding
Create a class hierarchy to model animals and their sounds.
- Define a base class
Animalwith a public methodspeak()that outputs a generic message. - Define a subclass
Dogthat extendsAnimaland overridesspeak()to output a dog-specific sound. - Define a subclass
Catthat extendsAnimaland overridesspeak()to output a cat-specific sound.
Lösning
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Completion betyg förbättrat till 6.67Challenge: Model a Simple Inheritance Hierarchy
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Recap: Inheritance, Visibility, and Overriding
You have learned that inheritance allows you to create a new class based on an existing one, using the extends keyword. This lets you reuse code and build logical relationships between classes. Visibility keywords—public, private, and protected—control which properties and methods are accessible from outside or inside the class and its subclasses. Method overriding lets a subclass provide its own implementation of a method defined in its parent class.
You are now ready to apply these concepts by modeling a simple class hierarchy representing animals and their behaviors.
Swipe to start coding
Create a class hierarchy to model animals and their sounds.
- Define a base class
Animalwith a public methodspeak()that outputs a generic message. - Define a subclass
Dogthat extendsAnimaland overridesspeak()to output a dog-specific sound. - Define a subclass
Catthat extendsAnimaland overridesspeak()to output a cat-specific sound.
Lösning
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