Advanced Computer Programming - Chapter 13 : Abstract classes and Interfaces

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Read this to understand reusability concept :

In object-oriented programming, reusability refers to the ability to reuse existing code components (such as classes, objects, and methods) in different parts of an application or in different applications altogether. This is accomplished through the use of inheritance, polymorphism, and other techniques.

Inheritance allows you to create new classes that are based on existing classes, inheriting their properties and behaviors. This makes it easy to create new classes that have many of the same characteristics as existing classes, but with some modifications or additions.

Polymorphism allows you to use objects of different classes interchangeably, as long as they implement the same interface or inherit from the same base class. This allows you to write generic code that can be used with many different types of objects, making it more flexible and reusable.

Other techniques for achieving reusability in object-oriented programming include encapsulation, abstraction, and design patterns. Encapsulation allows you to hide the implementation details of a class behind a well-defined interface, making it easier to change the implementation without affecting other parts of the program. Abstraction allows you to define a set of common behaviors or properties that can be shared by multiple classes, reducing duplication of code. Design patterns are established solutions to common programming problems that can be reused in different applications.

Overall, reusability is an important principle of object-oriented programming, as it helps to reduce the amount of code that needs to be written, improves maintainability, and promotes good design practices.