Most Java developers know what the JVM does. Very few understand how it manages memory byte-by-byte. This article covers everything — from the Mark Word bit layout to False Sharing to TLAB internals.

Your AI coding assistant writes a ScopedValue handler for a request pipeline. It binds a user context, forks the work to an ExecutorService, and reads the value on the worker thread. The code compiles ...

JDK 25 brings powerful new features to Java and JVM developers. Here are seven new or updated features that could convince you to switch. Java continues its fast and feature-packed release schedule, ...

One pain point for newcomers to Java has long been the ceremony of boilerplate classes, public static void main (...), System.out, etc. JDK 25 lets you write compact source files without an explicit ...

Java 25, an LTS (long-term support) version, is now at release candidate (RC) stage with general availability scheduled for September 16. The RC release is the first of two, with the second set for ...

ScopedValue is an alternative to ThreadLocal, and works in tandem with VirtualThreads and the new StructuredTaskScope. Find out what scoped values can do for your multithreaded programs in Java. As ...

On the day before Thanksgiving 2020, the Amazon Kinesis data streaming service in AWS' main region US-East-1 went down for several hours. The company explained the outage in its subsequent failure ...

Java Mission Control is a performance-analysis tool that renders sampled Java Virtual Machine metrics in easy-to-understand graphs, tables, histograms, lists and charts. Originally designed to depict ...

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BlockHound will transparently instrument the JVM classes and intercept blocking calls (e.g. IO) if they are performed from threads marked as "non-blocking operations only" (ie. threads implementing ...