Inside Java
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"Security in Java" [AtA]
September 24, 2026 · 33 minGiven how prevalent Java is on web servers throughout the internet, security in Java is of critical importance. There's the security of the JDK itself, of course, which is overseen by the OpenJDK Security Group, which you should report JDK…
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"AOT Caching - Netflix' Practice vs OpenJDK's Theory" [I/O]
September 17, 2026 · 1 hr 11 minJava projects that want to reduce their launch times need to look into Java's new ahead-of-time capabilities. A training run is used to populate a cache that, in production, allows the JVM to short-circuit many operations, like class…
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"Declassifying the Java 27 Release!" [IJN]
September 10, 2026 · 16 minJava 27 is heading for release on September 15th. As with every release of the JDK there are a host of changes that will impact developers, from new features, to changes in behavior of existing features. In this episode of the Inside Java…
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"Operator Overloading with Type Classes" [AtA]
August 27, 2026 · 42 minOpenJDK's Project Valhalla is improving Java's support for custom numerical types. That goes beyond value types and also encompasses explorations into operator support. While Java is extremely unlikely to ever allow arbitrary operator…
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"Keeping Up with the Java Release Train" [I/O]
August 20, 2026 · 34 min -
"JSON API, Valhalla Progress, LTS ❤️ PQC" [IJN]
August 15, 2026 · 10 minJEP 540 proposes to incubate a simple JSON API and is currently proposed to target JDK 28. The pull request for Project Valhalla's JEPs 401 and 539 were merged and value types are available as a preview feature in the latest JDK 28…
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"Embracing Virtual Threads with Helidon" [I/O]
August 6, 2026 · 14 minHelidon 4.4 was released in April 2026 and stands out from other web frameworks by embracing new Java features as early as possible, particularly virtual threads and ahead-of-time computation. It is also aiming to become an OpenJDK project…
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"JIT Compiler From the Ground Up" [AtA]
July 30, 2026 · 46 minWhile Java programs are deployed as bytecode, performance-relevant code will be compiled, at run time, to machine code whose performance rivals that of any other platform. In the HotSpot JVM, this is the job of the just-in-time compilers…