Core Java
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Harvest Now, Decrypt Later: What JEP 527 Hybrid Key Exchange Protects and What It Doesn’t
An attacker does not need a quantum computer today to threaten your data. They only need a disk. If they…
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Money in Java: Why double Ruins Ledgers, and BigDecimal Against Minor Units
Every developer meets the same surprise sooner or later: 0.1 + 0.2 does not equal 0.3. In a toy program,…
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Zero-Copy and the Page Cache: Why Kafka Is Fast, Using FileChannel.transferTo
Kafka moves enormous amounts of data, yet its brokers do surprisingly little work per byte. The secret is not clever…
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Testing Non-Deterministic LLM Output in Java: Evaluation Harnesses for CI
Every Java developer knows the comfort of assertEquals. Give a method the same input, and you get the same output.…
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Why synchronized Got Fast: The Rise and Removal of Biased Locking
For years, Java developers heard the same advice: “synchronized is slow, so avoid it.” Then, around Java 6, that advice…
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Kubernetes CPU Limits and JVM Throttling: Why p99 Spikes With Plenty of Idle CPU
The dashboard looks calm. CPU usage sits near 20%, memory is fine, and yet the p99 latency graph keeps spiking.…
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The Class-File API Replacing ASM: What It Means for Frameworks
Almost every Java developer has seen this error after a JDK upgrade: “Unsupported class file major version.” Behind it sits…
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Getting Started with FitNesse for Acceptance Testing in Java
FitNesse is a web-based wiki and acceptance-testing framework, originally built by Robert C. Martin as an extension of Ward Cunningham’s…
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New Features in Java 27
Java 27 (also called JDK 27) was released on September 15, 2026. It’s a regular six-month feature release, not an…
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