Java 26 Primitive Types in Patterns — The Interview Trap

Java 26 ships JEP 530 — the fourth preview of primitive types in patterns — and with it comes one of the…

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Implementing Quantum-Resistant ML-KEM and ML-DSA in Java

As quantum computing continues to evolve, traditional public-key cryptographic algorithms such as RSA, DSA, and Elliptic Curve Cryptography (ECC) face…

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Getting Started with WebDriverManager

Selenium WebDriver is a widely used framework for browser automation, but managing browser drivers manually can be time-consuming and error-prone…

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Spring AI 2.0 + MCP: Building a Tool-Calling Agent in 50 Lines

Spring AI 2.0-M6, shipped May 8, 2026, is the milestone where building an MCP tool-calling agent in Java stops feeling…

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Virtual Thread Pinning: The Silent Performance Killer in Your Codebase

Virtual threads promise to make blocking I/O cheap. And they do — as long as they can actually unmount from…

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Records in Production: Where They Shine and Where They Silently Fail

Records are one of the most genuinely useful additions to modern Java. They eliminate boilerplate, communicate immutability at the type-system…

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Why Your Integration Tests Are Slower Than They Should Be: The Spring Context Cache You Don’t Know You’re Misusing

Every JCG article recommends @SpringBootTest for integration testing. Almost none explain the context cache model underneath it — how a single misplaced @DirtiesContext,…

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The Split-Brain Problem in Plain English — And the Three Ways Your Distributed Cache Handles It Wrong

Redis Sentinel, Hazelcast, and Infinispan all have split-brain documentation. None of them tell you what your Java code silently observes…

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ThreadLocal Is a Memory Leak Waiting to Happen With Virtual Threads — Here’s the Proof

ThreadLocal was designed for a world of 200 pooled platform threads living for the life of an application. Virtual threads…

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