Totally missed a very cool API appeared in Java 22, ListFormat: > ListFormat.getInstance(Locale.ENGLISH, ListFormat.Type.OR, ListFormat.Style.FULL).format(Arrays.asList("Java", "Kotlin", "Scala")) "Java, Kotlin, and Scala"

It's huge. github.com/openjdk/jdk/...

8389219: Implement JEP 401: Value Objects (Preview) · openjdk/jdk@cc278db

8389220: Implement JEP 539: Strict Field Initialization in the JVM (Preview) Co-authored-by: David Simms <dsimms@openjdk.org> Co-authored-by: Dan Smith <dlsmith@openjdk.org> Co-authore...

github.com

It's a good idea to check your code for numeric overflows. You might think that overflow is impossible, as the number should be ridiculously big to overflow. But this may actually happen!

Released StreamEx 0.9.0. Main change: JSpecify annotations on the library. It should be more null-safe and more Kotlin-friendly now. Bugs are possible, feel free to report. github.com/amaembo/stre...

GitHub - amaembo/streamex: Enhancing Java Stream API

Enhancing Java Stream API. Contribute to amaembo/streamex development by creating an account on GitHub.

github.com

Single log formats time in four different ways. Computers were a mistake.

"Write Once. Run Forever: The Java Story" is coming July 17th! Check out the trailer now: youtu.be/8jrKl4teAjY The full film premieres on YouTube on July 17th at 7pm UTC. James Gosling, Java's creator, and other cast members, will join in the chat.

Write Once, Run Forever: The Java Story | Official Trailer | Full Film Coming July 17th

YouTube video by CultRepo

youtu.be

Null pointer exceptions are the billion dollar mistake. With Spring Boot 4 & Spring Framework 7 now fully on board with JSpecify, it's time to fix them for good. @0.5ritter.de from the Spring team shows you how. 👇 youtu.be/tpz-FSs6oO4

Nulls are dead - Moritz Halbritter | IntelliJ IDEA Tech Talks

Null pointer exceptions have been called the billion dollar mistake. They are a common source of bugs and frustration. JSpecify aims to fix that, and with Spring Boot 4 and Spring Framework 7 now…

youtu.be

Today is the 15th Global Accessibility Awareness Day #GAAD. In honor of it, we want to share recent improvements to compatibility with assistive technologies across different platforms, keyboard navigation, and non-visual feedback in JetBrains IDEs: blog.jetbrains.com/platform/202...

Improving Accessibility in JetBrains IDEs: What’s New and What’s Next in 2026 | The JetBrains Platform Blog

On Global Accessibility Awareness Day, we’re sharing recent improvements and what’s next for assistive technologies, navigation, and non-visual feedback.

blog.jetbrains.com

Thanks to bugs.openjdk.org/browse/JDK-8..., I can now close several long-standing issues in #IntelliJIDEA bug tracker as 'third-party issue'. People reported that IntelliJ erroneously highlights compilable code as red. But it was not our mistake.

For #IntelliJ plugin writers. blog.jetbrains.com/platform/202...

UI Freezes and the Dangers of Non-Cancellable Read Actions in Background Threads | The JetBrains Platform Blog

In JetBrains IDEs, UI freezes are often blamed on “heavy work on the EDT,” but our recent investigations show another common culprit in plugins: long, non-cancellable read actions running in backgroun

blog.jetbrains.com

Big day for #Java – Java 26 is here! ☕ IntelliJ IDEA already supports it, so you can try the new features right away. Read more in our blog post: jb.gg/avyjks. Visiting JavaOne? Stop by the JetBrains booth to talk about Java 26 and IntelliJ IDEA with us in person.

Java 26 in IntelliJ IDEA | The IntelliJ IDEA Blog

Java 26 was released on March 17, 2026. At JetBrains, we are committed to supporting the latest technologies in IntelliJ IDEA and adding useful enhancements for both stable and preview features. In…

jb.gg

I've received a copy of Japanese translation of my '100 Java Mistakes' book. I love the work done by translator Yoshiki Shibata! He didn't just translate the text.

Enhanced Local Variable Declarations #Java JEP draft is published! bugs.openjdk.org/browse/JDK-8... Do you remember that the "records in for-each statements" feature was previously a part of JEP 432 and delivered to Java 20 (preview), but dropped since Java 21?

Girls’ Day at the JetBrains office in Munich, Apr 23rd. The registration is open here: www.girls-day.de/.oO/Show/jet...

Angebot: Ein Tag in der Welt der Softwareentwicklung

München | 23. April 2026, 10:00 | JetBrains GmbH, München mit Ekaterina Popova

girls-day.de

Today we had a fire alarm in the office. A colleague wrote to a Slack channel 'Fire alarm in the office building', to start a thread if somebody knows any details.

Just seen on a code review: > .groupBy({ it.second }, { it.first }) People may think it's short and concise. I think, it's cryptic and unreadable. You have to go several lines above and find `to` inside one of previous lambdas to finally understand what is `it.first` and what is `it.second`.

Fun with #Kotlin: a pair of parentheses may cost you a lot!

In today crazy #Java series: this code works (with Java 25): <T extends Integer> void test(T t) { t++; //t+=1; IO.println(t); } void main() { test(10); } But if you replace t++ with t+=1, it stops working! Main.​java:3: error: incompatible types: int cannot be converted to T

Had a talk about JSpecify and IntelliJ IDEA on Coffee + Software channel www.youtube.com/live/K9QIYZM...

Nullability, JSpecify, and IntelliJ with Andrei Kogun and Tagir Valeev

YouTube video by Coffee + Software

youtube.com

Nice commit github.com/stack-auth/s...

The IntelliJ IDEA 2025.3 release has landed! This version brings several significant updates, all of which are described and demoed on our What’s New page. Check it out! 👇

What's New in IntelliJ IDEA 2025.3

Explore IntelliJ IDEA's latest features and updates to elevate your professional Java and Kotlin development experience.

jetbrains.com

@briangoetz.bsky.social are you really this old? 😱

Will you expect this code to be JSpecify-compliant? If not, then how to fix it? @NullMarked public final class Demo { List<String> removeNulls(List<@Nullable String> input) { return input .stream().filter(Objects::nonNull).toList(); } }

Don't miss my new blog post in the Road to GA series to learn how the Spring team empowers Spring developers to make their Spring Boot 4 application null-safe, to reduce or remove the risk of NullPointerException and to solve "the billion dollar mistake"! spring.io/blog/2025/11... #spring #java

Null-Safe applications with Spring Boot 4

Level up your Java code and explore what Spring can do for you.

spring.io

A user reports wrong highlighting in IntelliJ IDEA: the code is red, but both javac compiler and ecj compiler compile the code successfully, using any version of compiler. Next you read the spec and realize that IntelliJ IDEA behavior is correct, and both compilers are wrong. Weird feeling.

Days since I mixed 'ExpressionUtils' and 'ExceptionUtils': 0

Is it official now to call the taskbar notification area as 'tray'? I remember Raymond Chen saying that this is wrong 🤔 devblogs.microsoft.com/oldnewthing/...

Fixed a static analysis warning in a Java file in the repo . . . It was a demonstration Java file used to onboard users and teach them about IntelliJ IDEA inspections and quick-fixes. The warning was there to illustrate how inspections work 🤦

TIL: In #Java, List.subList() and List.reversed() are implemented smartly. You may call these methods as many times as you want and in any order, but you don't get a long chain of references which leads to StackOverflowError. The longest chain of views is two: reversed -> subList -> original list.

Implemented Comparator.min/max for the Java standard library. Should be available since Java 26. ❌comp​.compare(a, b) >= 0 ? a : b ✅comp.max(a, b) bugs.openjdk.org/browse/JDK-8...