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Java 24 Overview

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As a Java senior developer I am always interested in the latest advancements in Java (24). I decided to take a look and summarise what’s happening “at the Edge” of Java.

This release brings a host of new features and improvements that promise to enhance our development experience and push the boundaries of what we can achieve with Java. Each release makes tons and tons of Java tutorials onliny simply deprecated and this is particularily important for those who start to learn java. Perhaps I’m getting old, but the pace makes me feel like I just don’t follow along 👵

Key Features of Java 24

  • Structured Concurrency (Fourth Preview): This feature aims to simplify concurrent programming by introducing a structured approach to managing threads and tasks. It helps in writing more readable and maintainable concurrent code
  • Quantum-Resistant Security: Java 24 includes implementations of quantum-resistant algorithms, ensuring that our applications remain secure in the face of future quantum computing advancements
  • Flexible Constructor Bodies: This feature allows statements in a constructor to appear before an explicit constructor invocation, such as super(…) or this(…). It enhances the reliability of classes when methods are overridden
  • Primitive Types in Patterns and instanceof: The instanceof operator and switch expressions/statements now support all primitive types, making pattern matching more powerful and versatile
  • Module Import Declarations: This simplifies the reuse of modular libraries by allowing succinct import of all packages exported by a module
  • Ahead-of-Time Class Loading and Linking: This feature improves startup time and performance by preloading and linking classes before runtime
  • Generational Shenandoah Garbage Collector: Enhancements to the Shenandoah GC improve its performance and efficiency, making it a more viable option for large-scale applications

A few smaller, tasty bits I liked

  • Synchronization of virtual threads without pinning: SeeJEP 491 for details. The issue was finally endorsed and now virtual threads that are running blocking operations in synchronized blocks are no longer being “pinned” to platform thread, making it unusable as a carrier for other virtual threads.
  • Simple Source Files and Instance Main Methods: See JEP 495 - this helps during learning and in all those situations when you are in “Java context” and want to write short scripts.
  • Stream gatherers: makes you more efficient when you need to define custom intermediate operations. Implemented already are windomFixed(int) and windowSliding(int) - see the javadoc

Resources to Stay Updated

To dive deeper into these features and stay updated with the latest information, check out the following resources:

Call to Action

I encourage you to explore these new features and enhancements in Java 24. Try them out in your projects, experiment with the new APIs, and see how they can improve your development workflow. By staying ahead of the curve and leveraging the latest advancements, we can continue to build robust, efficient, and secure applications.

Happy coding! 🚀

Originally posted on LinkedIn.

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Updated on 2025-03-21
 Java, Programowanie
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