Java 26 Primitive Types in Patterns — The Interview Trap

Java 26 ships JEP 530 — the fourth preview of primitive types in patterns — and with it comes one of the…

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Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide

JFR and async-profiler guides are everywhere. Safepoint logs — the raw output that tells you exactly why your JVM froze — are…

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String Deduplication Is On By Default in G1 — And Most Developers Don’t Know What It Does

A granular look at what the JVM is quietly doing with your strings at the native level, when that work…

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Java’s Memory Model Is Not What You Think: The Gap Between the JMM Spec and the JIT’s Actual Guarantees

The Java Memory Model is formally specified. The JIT implements a superset of that spec in ways the spec permits…

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JEP 500 and Final Field Integrity: How Java Is Closing a Reflection Loophole That’s Been Open Since JDK 1.0

For decades, developers, frameworks, and serialization libraries have quietly mutated final fields at runtime through deep reflection. JDK 26 is now putting…

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Type Classes Are Coming to Java. What the Valhalla Prototype Actually Means

In late 2025, a quiet but consequential prototype landed in the Valhalla repository. If it ever ships, the way Java…

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