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)

Class properties

In Kotlin, each class property is considered a first-class citizen, which we discussed in the Properties – A first class citizen section of Chapter 2, Introduction to Object-Oriented Programming. In this section, we will learn more about properties and how to define the getter and setter functions that are explicitly provided by Kotlin. Let's create a Person class with two properties, name and age:

class Person {
var name: String = ""
var age : Int = 0
}

Create an instance of the Person class. Assign some values to each property and display the values on the screen:

fun main(args: Array<String>) {
val abid = Person()

abid.name = "Abid Khan"
abid.age = 40

println(abid.name)
println(abid.age)
}

When we assign a value to a class property, such as abid.name = "Abid Khan", or get a value...