Java
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Core Java
C# 13 & .NET 9 vs Java 25: The Feature Gap Has Closed — Now What?
For decades, Java and C# traded punches on language features. In 2026, however, that fight looks a lot more like…
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Enterprise Java
RAG Architecture on the JVM: Building a Production-Ready Pipeline With LangChain4j
A practical walkthrough of embedding models, vector stores, retrieval strategies, prompt engineering, and evaluation — without leaving the JVM. 1.…
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Enterprise Java
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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Enterprise Java
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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Core Java
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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Core Java
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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Core Java
The Object Allocation Tax: Why Your Java Service Is 40% GC and How the JIT’s Escape Analysis Both Helps and Misleads You
A ground-level look at how HotSpot C2 decides between scalar replacement and heap allocation, the everyday patterns that silently defeat…
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Core Java
OpenRewrite: The Automated Migration Tool That’s Quietly Changing How Teams Upgrade Java
It started at Netflix, migrated the Jakarta EE TCK, and is now the dominant automation tool for Java modernization according…
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Core Java
Virtual Threads One Year in Production: What Teams Got Wrong and What Actually Improved
Project Loom shipped in Java 21 in September 2023. Two-plus years of real production data — including Netflix’s deadlock post-mortem,…
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