https://yashsachdeva.com/tags/java-21/ Recent content in Java 21 on Tech Blog Hugo -- gohugo.io en © 2026 Yash Sachdeva Wed, 08 Apr 2026 20:04:08 +0530 https://yashsachdeva.com/posts/mastering-concurrency-in-java-part-4-deep-dives-and-modern-patterns/ Wed, 08 Apr 2026 20:04:08 +0530 https://yashsachdeva.com/posts/mastering-concurrency-in-java-part-4-deep-dives-and-modern-patterns/ <p>In <a href="https://yashsachdeva.com/posts/2026/04/concurrency-part-1/" >Part 1</a>, <a href="https://yashsachdeva.com/posts/2026/04/concurrency-part-2/" >Part 2</a>, and <a href="https://yashsachdeva.com/posts/2026/04/concurrency-part-3/" >Part 3</a>, we covered hazards, primitives, and execution models. In this final part, we will focus on structured concurrency, fan-out/fan-in, fail-fast cancellations, timeout propagation, resource scoping, and observability with thread dumps and Java Flight Recorder (JFR), emphasizing when to choose which pattern.</p>