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Inside Java

10 stories

Inside JavaLanguagesJDK 27 G1/Parallel/Serial GC changes Now that the JDK 27 has been released, I thought it would be time to discuss interesting changes in OpenJDK’s stop-the-world collectors in the HotSpot VM once more.

Inside JavaLanguagesEpisode 73 “Immutable Data Beyond Value Classes” [AtA] Recent and upcoming Java features (e.g. value classes, withers, and lazy constants) make it easier to define, construct, copy, and access immutable data

Inside JavaLanguagesJava Secure Coding Guidelines Get an overview of the Secure Coding Guidelines for Java and best practices. Examples will be provided to show insecure practices that may lead to security vulnerabilities.

Inside JavaLanguagesQuality Outreach Heads-up - JDK 28: Value Classes This Heads-Up is part of the regular communication sent to the projects involved; it covers the introduction of value classes and strict fields

Inside JavaLanguagesJEP targeted to JDK 28: 544: Ahead-of-Time Code Compilation The following JEP is targeted to JDK 28: 544: Ahead-of-Time Code Compilation

Inside JavaLanguagesCompromised Certificates and OpenJDK Java Runtimes As has been widely reported, the private keys of eight eMudhra intermediate CA certificates have been compromised.

Inside JavaLanguagesAllocating Off-Heap Memory: Typically 6-18x Faster in JDK 28 Pooled confined arenas provide a significant performance improvement for short-lived native allocations.

Inside JavaLanguagesWhat's Going Wrong with My JVM?! A Guide to First-Time Failure Diagnosis It's 2 AM Friday night when you get alerts your primary business application stopped responding and user tickets are piling up.

Inside JavaLanguagesJEP targeted to JDK 28: 543: Structured Concurrency The following JEP is targeted to JDK 28: 543: Structured Concurrency

Inside JavaLanguagesReflect, Transform, Accelerate: Bringing GPU Computing to Java Java’s code reflection API, developed in OpenJDK Project Babylon, opens a new path to targeting foreign programming models directly from Java—including GPUs.

On the calendar

予定 · Conferences and launch events, this week's stories from each corner of the industry, and what its press is covering — in English

On view

This week, from that corner the newest stories from the corner of the industry you picked

The wire their own posts, translated

How code moves in 2026 from the industry's own reports

Sources

Fetched every six hours, linked to the original

About

The name is the button.

An agent writes the code now, and a human thumb hovers over Accept all a hundred times a day. The honest question of this decade is what, exactly, you just accepted. So I read the diff.

Eight years as a backend engineer in Stockholm, back in Tokyo since 2023, and I still ship something small most nights, usually badly. My one rule: the only real review of a model is the thing you built with it. That is why there is no leaderboard on this site.

Around a hundred and forty sources come through — the labs' own posts, the papers, the tools, the runtimes and languages nobody is watching yet, the chip under the demo, and the newsletters people actually forward. What is moving gets counted so the week reads at a glance, and every few days I explain one mechanism in plain words.

A story here is a headline, a short excerpt, one image and the link to whoever wrote it. We never reproduce the post; the images belong to their authors. A post written in Japanese appears in Japanese, exactly as it was published, and the link goes to the original.

— Yuki Halvorsen, Tokyo