Inside Java

Quality Outreach Heads-up - JDK 27: Default G1 in All Environments

2026-07-20T00:00:00Z

This Heads-Up is part of the regular communication sent to the projects involved; it covers G1 becoming HotSpot's default GC in all environments.

Episode 62 “JDK 27 + Valhalla, Now! + Hackathon” [IJN]

2026-07-19T00:00:00Z

JDK 27 entered RDP1, Valhalla's JEP 401 is being merged into JDK main, join our hackathon, and more

Java - The Documentary

2026-07-18T00:00:00Z

From its humble beginnings as a project code-named "Oak" at Sun Microsystems to becoming a global standard for enterprise software and billions of devices, Java's journey is one of radical innovation, strategic pivots, and enduring community strength.

Identifying JDK Value Class Candidates

2026-07-16T00:00:00Z

As long as value classes are a preview feature, they can’t generally be adopted in the JDK libraries (which are not compiled with `--enable-preview`). However, we felt it was important for this JEP to provide users with a “starter kit” of some value classes out of the box, and to ease into any migration challenges for popular classes, so we identified a handful of JDK classes that the JEP can treat as value classes when preview features are enabled.

Episode 61 “Scripting JS and Python with Project Detroit” [AtA]

2026-07-09T00:00:00Z

OpenJDK recently resurrected Project Detroit, an effort to ease Java's interoperability with Python and JavaScript.

SIMD Vectors in the HotSpot JVM - Auto Vectorization and the Vector API

2026-07-02T00:00:00Z

Explore the latest work on the HotSpot JVM, with a focus on auto-vectorization and the Vector API.

ZGC: A Decade of Redefining Java Performance

2026-06-30T00:00:00Z

ZGC is a concurrent garbage collector, meaning all heavy GC tasks are performed alongside application threads, resulting in sub-millisecond pause times. This talk will explore a brief history of ZGC, its internal mechanisms, the performance in JDK 25, and future development plans.

Episode 60 “How JEPs Drive Java's Evolution” [AtA]

2026-06-25T00:00:00Z

JEPs are OpenJDK's vehicle for documenting and communicating substantial changes of the Java language, its APIs, and the runtime but also the JDK project itself.

Better Tools for Immutable Data

2026-06-21T00:00:00Z

This session covers new and upcoming Java features for working with immutable data, and explains how they improve reliability and performance while enabling JVM optimizations and guiding when to use them.

Can Java Microservices Be As Fast As Go? A 2026 Benchmark Update

2026-06-15T00:00:00Z

Six years after first comparing Java and Go microservices, the authors revisit the performance question: whether carefully implemented Java and Go HTTP services still deliver similar results on modern runtimes and hardware. Rather than framing it as a language competition, the 2026 article examines how each performs as payload sizes and concurrency increase, with all code, benchmarks, and results available in a companion repository.