Chapter 21: Problem 5

What are the differences and similarities of EXTENDS and interface ":" inheritance?

Short Answer

Expert verified

EXTENDS and Interfaces both promote code reusability. EXTENDS achieves this by enabling one class to inherit the properties and methods of another, allowing multiple subclasses to share these traits. On the other hand, interfaces enforce the implementation of certain methods in any class that implements the given interface. The key difference is that a class can extend only one other class but can implement multiple interfaces.

Step by step solution

Defining EXTENDS and Interfaces

EXTENDS is used in class declarations or class expressions to create a class as a child of another class. An Interface in programming, however, is a blueprint of a class. It has static constants and abstract methods.

Understanding the Similarities

Both EXTENDS and interfaces promote reusability of the code. They both provide a way to achieve abstraction and multiple inheritance in the code.

Listing the Differences between EXTENDS and Interfaces

Difference can be understood by the following points: \n1. EXTENDS is used to inherit properties and methods from one class to another, while interfaces are used to implement methods in a class which are declared in an interface.\n2. With EXTENDS, a class can only extend one other class, while it can implement multiple interfaces.\n3. EXTENDS allows for the creation of methods in a superclass that can be shared among multiple subclasses, while an interface only allows for the declaration of methods that must be implemented in any class that implements the interface.

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What are the differences and similarities of EXTENDS and interface ":" inheritance?

Short Answer

Step by step solution

Defining EXTENDS and Interfaces

Understanding the Similarities

Listing the Differences between EXTENDS and Interfaces

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