Learning materials overview

You can use the following materials and resources for learning Kotlin:

• Basic syntax – get a quick overview of the Kotlin syntax.

• Idioms – learn how to write idiomatic Kotlin code for popular cases.

  • Java to Kotlin migration guide: Strings – learn how to perform typical tasks with strings in Java and Kotlin.

  • Java to Kotlin migration guide: Collections — learn how to perform typical tasks with collections in Java and Kotlin.

  • Java to Kotlin migration guide: Nullability — learn how to handle nullability in Java and Kotlin.

• Kotlin Koans – complete exercises to learn the Kotlin syntax. Each exercise is created as a failing unit test and your job is to make it pass. Recommended for developers with Java experience.

• Kotlin by example – review a set of small and simple annotated examples for the Kotlin syntax.

• Kotlin Core track by JetBrains Academy – learn all the Kotlin essentials while creating working applications step by step.

• Kotlin books – find books we've reviewed and recommend for learning Kotlin.

• Kotlin tips – watch short videos where the Kotlin team shows you how to use Kotlin in a more efficient and idiomatic way, so you can have more fun when writing code.

• Advent of Code puzzles – learn idiomatic Kotlin and test your language skills by completing short and fun tasks.

• Kotlin hands-on tutorials – complete long-form tutorials to fully grasp a technology. These tutorials guide you through a self-contained project related to a specific topic.

• Kotlin for Java Developers – learn the similarities and differences between Java and Kotlin in this course on Coursera.

• Kotlin documentation in PDF format – read our documentation offline.