You're reading from Kotlin for Java Developers Confidently transition from Java to Kotlin through hands-on examples and idiomatic Kotlin practices

Product type Paperback

Published in Oct 2025

Publisher Packt

ISBN-13 9781835884829

Length 414 pages

Edition 1st Edition

Languages

Kotlin

Tools

Kotlin 1.5

Concepts

Programming Language

Authors (2):

José Dimas Luján Castillo

Ron Veen

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Table of Contents (22) Chapters

Preface

1. Getting Started with Kotlin

2. An Introduction to Kotlin and Its Basic Types FREE CHAPTER

3. Interoperability, Gradle, and Maven

4. Null and Non-Nullable Types

5. Extension Functions and the Apply Function

6. Object-Oriented Programming

7. Object-Oriented Programming Basics

8. Generics and Variance

9. Data and Sealed Classes

10. Functional Programming

11. Basics of Functional Programming

12. Lambda

13. Collections and Sequences

14. Coroutines, Testing and DSLs

15. Coroutines

16. Synchronous and Asynchronous Programming

17. Kotlin Testing

18. Domain-Specific Languages in Kotlin

19. Unlock Your Book’s Exclusive Benefits

How to unlock these benefits in three easy steps

20. Other Books You May Enjoy

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21. Index

OOP overview

OOP is one of the most widely used programming paradigms to create software. You could also argue that it is the most popular, but it is certainly one of the many paradigms that all programmers must learn at some point, which is why we have dedicated a chapter to it in the book.

Some programming languages only support one programming paradigm, and others support more than one. Kotlin is a multi-paradigm language, meaning that we can work with different programming paradigms such as OOP, functional programming, procedural programming, declarative programming, reactive programming, and data-oriented programming using the same language.

A programming paradigm can be defined as a type of solution that is already defined, with some established ways of doing things, so when we use a programming paradigm, we use existing rules and definitions to try to address a type of problem and solve it in a certain way, or with a certain technique. It is a distinct set of concepts...