Kotlin

JetBrains AI subscription now includes Junie and AI Assistant – two tools that help Kotlin developers write, refactor, and ship code faster right in IntelliJ IDEA.

KotlinConf’25 kicks off soon! From not-to-miss sessions to the legendary party, here’s a quick preview of everything waiting for KotlinConf attendees.

Starting with version 2025.1, Kotlin Notebook will be integrated into IntelliJ IDEA Ultimate out of the box, without the need to install the plugin! Kotlin Notebook is a new interactive environment for JVM developers. The code in the notebooks can even call and use parts of your project codebase, al…

Starting with IntelliJ IDEA 2025.1, K2 mode, a new implementation of Kotlin support, will be enabled by default. This change is an important step in the ongoing effort to improve Kotlin support in the IDE.  While this transition brings many improvements and lays the foundation for a smoother…

I'm Yan Zhulanow, and I lead the Kotlin Analysis API team. Last year, we made a series of announcements about Kotlin K2 mode in IntelliJ IDEA. Now, as K2 mode is about to become the default, I am thrilled to tell you more about everything we had to go through to make this release happen. Even bef…

Context parameters will be replacing context receivers in Kotlin, with version 2.2.0 featuring them as Beta. We are committed to providing an easy migration between both features, including dedicated compiler and IntelliJ IDEA support.

Kotlin Heroes is a fun and challenging contest with problems designed to be interesting for programmers of all levels. Solve algorithmic problems, learn more about Kotlin, and get a chance to win prizes! The main contest will take place on April 7, 2025, but the practice round is already open – s…

Identifying edge cases for testing can be a challenging task, often leaving hidden bugs and vulnerabilities undetected. Fuzz testing (fuzzing) addresses this challenge by automatically generating tests with random or invalid inputs, enabling developers to uncover unexpected exceptions and failure sc…

Amper is an experimental build tool by JetBrains. The latest release adds new IDE features, improvements to the CLI experience, and important version updates.

Kodee’s back with another roundup of the latest updates and stories from the Kotlin world.

The Kotlin 2.1.20 release is out! This version includes performance improvements and bug fixes for Kotlin 2.1.0. Here are some highlights from this release: K2 compiler updates: New default kapt compiler plugin. Kotlin Multiplatform: A new DSL to replace Gradle’s Application plugin in multipl…

Kotlin is powering server-side development, and the community is creating great content! From Java migrations to Ktor tutorials, here are some standout picks.