IntelliJ IDEA

Kotlin Notebook is a new interactive environment for JVM developers. This article will cover the main Notebook features and how you can utilize them to improve your productivity.  How to use Kotlin Notebook Kotlin Notebook is bundled with IntelliJ IDEA starting from the 2025.1 release, an…

In this blog post, we will look at how to debug Java code using the IntelliJ IDEA debugger. We will look at how to fix a failing test, how to find out where an `Exception` is thrown, and how to find problems with our data. And we will learn some neat tricks about the debugger in the process!  …

Spring Framework 6.2 introduced MockMvcTester to support writing AssertJ style assertions using AssertJ under the hood. If you’re using Spring Boot, the spring-boot-starter-test dependency transitively adds the most commonly used testing libraries such as mockito, assertj, json-path, jsonassert, …

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…

We're excited to tell you about all the changes we've made in recent months to improve the Bazel plugin experience in IntelliJ IDEA. Every couple of weeks, we've been shipping updates to JetBrains Marketplace with focused fixes and features. Over time, these smaller updates have amounted to substant…

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…

Imagine you’re building a cutting-edge Java library, optimizing every method, and writing the most efficient algorithms. At some point, you’ll need to document your code because well-documented code increases adoption (a fact backed by various surveys). Including documentation comments within a Java…

IntelliJ IDEA 2025.1 Release Candidate is available for download, so we’re one step away from the major release! You can get the latest build from our website, through the free Toolbox App, or via snaps for Ubuntu. To use this build, an active subscription to IntelliJ IDEA Ultimate is requ…

We’re excited to announce our reworked terminal architecture, which is available in Beta starting with the 2025.1 versions of JetBrains IDEs. It now runs on a stable, standards-compliant core and uses the IDE's editor for UI rendering. This change lets us introduce new features while preserving comp…

Welcome to the April edition of Java Annotated Monthly! Java 24 has landed, and we’ve got plenty to say about it. From fresh language features to smart tricks and must-try tutorials, there’s something for every curious developer. The cherry on top? Mala Gupta joins us as this month’s featured guest …