IntelliJ IDEA

At JetBrains, we build tools to help developers stay focused and productive, and we’re especially proud when those tools help power the open-source projects that developers around the world rely on every day. Shaping the direction of Java development, such projects contribute substantially to the vi…

This blog post explores how Java and debuggers work behind the scenes.

Learn how Java began, what made it so popular with developers worldwide, and why it remains a key programming language 30 years later.

Everything you ever wanted to know about Java User Groups (JUGs)!

Developing an application with AWS services can introduce significant local‑development hurdles. Often, developers don’t receive timely AWS access, or a sysadmin inadvertently grants credentials for the wrong account – only to fix the error a week later. Then, when engineers discover they still lack…

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…

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…

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…

Join us online on June 3–4 for a free virtual IntelliJ IDEA Conf 2025.

IntelliJ IDEA has supported Java 24 since an earlier release, with more enhancements being added in the later releases! I’m often asked, “What’s the best feature of Java 24?” My answer? Why pick just one? 🙂 Java 24 continues to enhance the language with improvements like Simple source files and inst…