JVM Internals
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Core Java
Java 26 Primitive Types in Patterns ā The Interview Trap
Java 26 shipsĀ JEP 530Ā ā the fourth preview of primitive types in patterns ā and with it comes one of the…
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Core Java
Reading JVM Safepoint Logs Without Going Mad: A Practical Stop-the-World Diagnosis Guide
JFR and async-profiler guides are everywhere. Safepoint logs ā the raw output that tells youĀ exactly whyĀ your JVM froze ā are…
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Enterprise Java
String Deduplication Is On By Default in G1 ā 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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Core Java
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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Core Java
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 mutatedĀ finalĀ fields at runtime through deep reflection. JDK 26 is now putting…
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Core Java
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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