What's New In IntelliJ IDEA 2026.1

Our developer advocates got together to discuss and demonstrate the key updates in IntelliJ IDEA 2026.1.

The new version brings built-in support for more AI agents, including Codex, Cursor, and any ACP-compatible agent, and delivers targeted, first-class improvements for Java, Kotlin, and Spring.

00:00 Intro
00:43 AI updates
11:00 Support for JavaScript and TypeScript without an Ultimate subscription
14:00 Java 26 support
18:18 Command completion updates and tips & tricks
24:00 Debugger improvements
26:25 Git worktrees
30:50 Spring Data improvements
34:47 Spring Debugger
42:07 Better Kotlin Spring Routing DSL & Bean Registrar support
47:54 Improvements for Kotlin development with JPA
53:34 New Kotlin language features
58:34 Gradle best practicies
1:02:04 Streamlined Kubernetes workflows

Useful links:

AI updates:

Codex in JetBrains IDEs: https://blog.jetbrains.com/ai/2026/01/codex-in-jetbrains-ides/
Cursor joins the ACP registry: https://blog.jetbrains.com/ai/2026/03/cursor-joined-the-acp-registry-and-is-now-live-in-your-jetbrains-ide/
ACP Agent Registry: https://blog.jetbrains.com/ai/2026/01/acp-agent-registry/
ACP overview: https://www.jetbrains.com/acp/
Model Context Protocol (MCP) docs: https://www.jetbrains.com/help/ai-assistant/mcp.html

Java 26:

Java 26 in IntelliJ IDEA: https://blog.jetbrains.com/idea/2026/03/java-26-in-intellij-idea/
Learning modern Java the playful way: https://maritvandijk.com/presentations/modern-java-playful/

Spring Data:

Spring Data JDBC Made Easy with IntelliJ IDEA: https://blog.jetbrains.com/idea/2026/01/spring-data-jdbc-made-easy-with-intellij-idea/

Spring Debugger:
Spring Boot Debugging – Now Remote: https://blog.jetbrains.com/idea/2026/01/spring-boot-debugging-now-remote/

Kotlin:

How to Avoid Common Pitfalls With JPA and Kotlin: https://blog.jetbrains.com/idea/2026/01/how-to-avoid-common-pitfalls-with-jpa-and-kotlin/
What's new in Kotlin 2.3.0: https://kotlinlang.org/docs/whatsnew23.html
IntelliJ IDEA’s New Kotlin Coroutine Inspections, Explained: https://blog.jetbrains.com/idea/2026/03/intellij-idea-s-new-kotlin-coroutine-inspections-explained/

Gradle best practices:

Gradle Best Practices - A Path to Build Happiness: https://blog.gradle.org/gradle-best-practices
Best Practices for Authoring Gradle Builds: https://docs.gradle.org/current/userguide/best_practices.html
Marit's repository: https://github.com/mlvandijk/gradle-best-practices
Join us:
Website: https://jb.gg/website
Blog: https://jb.gg/blog
X: https://twitter.com/intellijidea
Bluesky: https://bsky.app/profile/intellijidea.com
LinkedIn: https://www.linkedin.com/showcase/intellijidea
Facebook: https://www.facebook.com/IntelliJIDEA/

Download IntelliJ IDEA: https://jb.gg/download-intellij-idea

Видео What's New In IntelliJ IDEA 2026.1 канала IntelliJ IDEA, a JetBrains IDE