Book Image

Hands-On Object-Oriented Programming with Kotlin

By : Abid Khan, Igor Kucherenko
Book Image

Hands-On Object-Oriented Programming with Kotlin

By: Abid Khan, Igor Kucherenko

Overview of this book

Kotlin is an object-oriented programming language. The book is based on the latest version of Kotlin. The book provides you with a thorough understanding of programming concepts, object-oriented programming techniques, and design patterns. It includes numerous examples, explanation of concepts and keynotes. Where possible, examples and programming exercises are included. The main purpose of the book is to provide a comprehensive coverage of Kotlin features such as classes, data classes, and inheritance. It also provides a good understanding of design pattern and how Kotlin syntax works with object-oriented techniques. You will also gain familiarity with syntax in this book by writing labeled for loop and when as an expression. An introduction to the advanced concepts such as sealed classes and package level functions and coroutines is provided and we will also learn how these concepts can make the software development easy. Supported libraries for serialization, regular expression and testing are also covered in this book. By the end of the book, you would have learnt building robust and maintainable software with object oriented design patterns in Kotlin.
Table of Contents (14 chapters)

Structural patterns

Structural patterns can be used when we need to use an instance with an interface that doesn't match our requirements, or we can improve our code base by building a class hierarchy that assumes each sub-type makes it possible to extend or alter the functionality of objects at runtime. We can also restrict access to an object by using the Proxy pattern.

This section covers the following patterns:

  • Adapter
  • Decorator
  • Facade
  • Proxy

Adapter

The Adapter pattern allows us to use a pre-existing interface without modifying the source. Let's imagine that we want to teach a cat how to bark. The following diagram shows how we can implement this:


The preceding diagram contains the Meowable and Barkable interfaces...