Understanding the Key Derivation Function API in Java 25

Java 25 introduces a standardized Key Derivation Function (KDF) API that simplifies the process of deriving cryptographic keys from passwords,…

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JUnit5 & Gradle Parallel Testing Example

Modern software applications often contain hundreds or even thousands of automated tests. While these tests help maintain software quality, execution…

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Sealed Interfaces + Exhaustive Switch: The Pattern the Senior Java Interview Expects

Six progressively harder questions — from exhaustiveness guarantees and non-sealed subtypes to generic bounds and cross-package visibility. Everything a senior…

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Java Virtual Threads Without Pinning

Virtual Threads, introduced as part of Project Loom, provide a lightweight concurrency model that enables Java applications to handle millions…

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Lazy Constants (JEP 531): JIT’s Best Friend You Haven’t Met

How ofLazy() unlocks constant-folding without static final, why it finally replaces double-checked locking, and what the numbers look like in practice. Every Java…

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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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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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