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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

Index

Symbols

!! operator 75, 76

A

abstraction 103

advantages 33, 34

access modifiers 16, 101

Any type

usage scenarios 140-144

apply function 79, 94-96

arguments

functions, passing as 194

arrays 24, 25

associateBy 260, 261

asynchronous programming 302-308

attributes 104

AuthorBuilder 362

AuthorsBuilder 362, 363

B

Behavior-Driven Development (BDD) 338

BookBuilder 364, 365

book DSL

benefits 371

building 361-365

trade-offs and considerations 371

Booleans 23

buffered channels 313-315

bytecode 16, 205

C

camel case 106

channels 313

buffered channels 313-315

exception handling 325-329

pipeline 321-324

rendezvous channels 318, 319

ticker channel 319-321

types 313

unbuffered channels 316, 317

ChapterBuilder 363, 364

Char type 23

classes 101-104

collections 234

and lambdas 240-244

in Java, versus Kotlin 234-237

operations...

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83

Tech Concepts

36

Programming languages

73

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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.

See other products by José Dimas Luján Castillo

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.

See other products by Ron Veen

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