Java technical articles

Java articles for working developers

Clear explanations of the details that shape real programs.

Explore virtual threads, pattern matching, reflection, stream pipelines, native memory, and the version details that change how Java code behaves.

Latest articles

8 articles

HTTP ClientAug 31, 20266 min read

Enable HTTP/3 in Java 26 HttpClient, choose a discovery mode, verify the negotiated response version, and handle fallback, HTTPS, and proxy limits.

Language featuresAug 30, 20265 min read

Write and run JDK 25 compact source files, understand their implicit class and imports, and migrate a small program to an explicit Java class.

Foreign Function and Memory APIAug 29, 20265 min read

Allocate and access native memory safely with Java MemorySegment, MemoryLayout, and Arena while avoiding lifetime, confinement, and pointer hazards.

StreamsAug 28, 20265 min read

Use Java stream gatherers for windows, scans, concurrent mapping, and custom short-circuiting while preserving pipeline and parallelism contracts.

ConcurrencyAug 27, 20265 min read

Use Java 25 scoped values for immutable request context, understand rebinding and restoration, and avoid ThreadLocal lifetime and inheritance traps.

Language semanticsAug 26, 20265 min read

Use sealed types and record patterns to make Java switches exhaustive, preserve compiler checks during evolution, and handle null and binary changes.

JDK migrationAug 25, 20265 min read

Prepare for JDK 26 final-field mutation warnings, locate reflective writes with debug mode or JFR, and scope temporary module permissions safely.

ConcurrencyAug 24, 20265 min read

Use Java virtual threads for high-throughput blocking work, limit scarce resources with semaphores, and diagnose the pinning that remains in JDK 25.