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Kotlin for Java Developers

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

View More author details

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

Join us on Discord!

21. Index

Technical requirements

To begin, you can use any text editor or Integrated Development Environment (IDE) of your choice with the Java language. We recommend IDE IntelliJ IDEA Community Edition (CE). This tool comes with everything you need to work with both Java and Kotlin. The list of requirements for this chapter is as follows:

Java JDK 8 or higher
IntelliJ IDEA CE
Kotlin 1.x

The code used in this chapter can be found in the book’s accompanying GitHub repository: https://github.com/PacktPublishing/Kotlin-for-Java-Developers.

The rest of the chapter is locked

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Authors (2)

José Dimas Luján Castillo

José Dimas Luján Castillo

José Dimas Luján has 15 years of experience as a software developer, mobile developer, Android, iOS, Flutter, as well as Tech Lead, for different companies around the world developing more than 500 applications for mobile devices. In addition, he has more than 7 development books and at the same time taught classes at more than 25 universities throughout Latin America on programming, mobile development, electronic business, and development of technological projects. He has been working for the last 10 years with technologies such as Java, Kotlin, Python, Rust, Dart, mostly oriented to mobile development. With the clear idea that sharing what he knows is learning twice.

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Ron Veen

Ron Veen

Ron Veen is a seasoned software engineer with over 20 years of experience in the JVM and Java ecosystem. An Oracle Certified Java Programmer and a certified Sun Business Component Developer, he has worked across domains from mainframes to microservices. A Java enthusiast with a keen interest in Kotlin, Ron serves as a Special Agent and Lead Developer at Team Rockstars IT and speaks regularly at international conferences. He is the author of books on Java Cloud-native migrations with Jakarta EE and on advanced concurrency topics such as Virtual Threads, Structured Concurrency, and Scoped Values.

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