Kotlin in Action

Name: Kotlin in Action
Author: Dmitry Jemerov, Svetlana Isakova

Dmitry Jemerov, Svetlana Isakova

Summary Kotlin in Action guides experienced Java developers from the language basics of Kotlin all the way through building applications to run on the JVM and Android devices. Foreword by Andrey Breslav, Lead Designer of Kotlin.

15.5 score

#127 overall

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Score based on developer article recommendations — not sales data or reviews.

Kotlin Java Code Quality Backendfunctional-programmingconcurrencyKotlin

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🟢 Developer Verdict

An in-depth guide for experienced Java developers transitioning to Kotlin, covering language features and application development for JVM and Android.

Read this if

✓ You are an experienced Java developer learning Kotlin.
✓ You want to build applications for JVM or Android with Kotlin.
✓ You prefer a structured, detailed walkthrough of a new language.

Skip this for now if

✗ You are new to programming and need a beginner-level introduction.
✗ You seek a quick reference or a very concise overview of Kotlin.
✗ You prefer learning Kotlin through interactive tutorials or video courses.

Developer signal: Overwhelming Consensus · 100% 6 analyzed mentions ComprehensiveFoundationalWell Written

📊 Why Developers Recommend

It provides practical, applicable knowledge for everyday development.

Cited by 6 different developers, each bringing their own experience and perspective.

Praised for its breadth and depth, covering a wide range of topics that serve as both a learning resource and a long-term reference.

Top signals: ComprehensiveFoundationalWell Written

💬 What Developers Say

"I became a technical reviewer of the second Kotlin book ever published – Kotlin In Action"
— igorwojda · Igor Wojda Joins the Vonage Developer Relations Team · Mar 12, 2020

"If you would like to know more about Kotlin check out the Kotlin in Action ebook."
— lemuelogbunude · The funny Java vs Kotlin battle · May 15, 2019

"If you prefer books, then Kotlin in Action is also not bad."
— javinpaul · Kotlin or Java? Which is Best Programming Language for Android Developers? · Sep 24, 2018

Based on 6 developer article mentions