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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The AI Coding Assistant Has Been on Your Team for a Year. What Did It Actually Change About How We Write Software?

GitHub Copilot, Cursor, and Claude Code now have 12–18 months of real production data. The honest post-adoption analysis — what…

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Structured Concurrency and the Death of CompletableFuture Hell

What Java 21–26’s concurrency model actually changes at the architecture level. Not a feature tour — a genuine examination of…

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WebAssembly in 2026: Three Years of “Almost Ready”

The Component Model shipped. WASI Preview 2 is stable. Wasmtime hit 30+. Browser WASM is genuinely mature. And yet server-side…

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Kotlin 2.x vs Java 21+The Language Choice for New JVM Projects

The K2 compiler shipped. Multiplatform went stable. Java landed records, pattern matching, and virtual threads. The gap genuinely narrowed —…

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Spring Boot 4 vs. 3: What Actually Changed

The migration guides list dozens of changes. Most articles rehash the changelog. This piece focuses on the three changes that…

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Hibernate 6 vs. Spring Data JDBC vs. jOOQ. Picking Your Persistence Strategy for the Virtual-Thread Era

JDBC is still blocking. Hibernate 6 added reactive support through Vert.x. jOOQ is reviewing its ThreadLocal usage for Loom compatibility.…

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Sealed Classes and Exhaustive Pattern Matching: How They Change API Design, Not Just Syntax

Both features have been stable since Java 17 and 21. Most articles show the syntax. Almost none explain how they…

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Java Module System in 2026: Still Ignored, Still Relevant

JPMS shipped with Java 9 in 2017. Nearly a decade later, enterprise adoption remains stubbornly low. This is not a…

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