2023-09-28 19:18:16
The Java 21 release, which includes both language and virtual machine specification changes, contains a series of features that set Java 21 apart from many previous releases. In the same way that Java 5 changed Java development with the introduction of Generics, and Java 8 with the introduction of Lambdas, the Java community expects the 21st version to have a significant and positive impact on the ecosystem. Java, and Microsoft is excited to be part of this era of modern Java development.
Java 21 has arrived just as fall begins in the Northern Hemisphere and spring begins in the Southern Hemisphere. Spring developers like Josh Long are therefore very excited regarding Spring Boot 3.2 supporting Java 21 features. Many other frameworks and libraries will soon release their versions compatible with JDK 21.
Here are some of the exciting features of Java 21, both in terms of API, language features and HotSpot JVM capabilities provided by the OpenJDK reference implementation: Simplified learning of Java for beginners: With the preview of Unnamed classes and instance main methods, the path for novices to start their journey in Java becomes easier. This change paves the way for a seamless transition from basic Java programming to advanced Java programming, ensuring learners have a progressive and intuitive experience. This opens opportunities to integrate a simplified coding experience with serverless functions in services like Azure Functions. Increase flexibility with templates and variables: Introduced preview of unnamed templates and variables. Denoted by an underscore _, these patterns and variables enhance Java’s matching and initialization capabilities. Improving application performance with Generational ZGC: The Generational ZGC enhancement focuses on optimizing performance, reducing Allocation blocking risks, reducing heap memory overhead, and reducing CPU overhead for garbage collection. All this without compromising throughput. Deconstruction of record values with record patterns: After being refined in JDK 19 and 20, record patterns in JDK 21 provide a data navigation and processing mechanism richer and more expressive, which evolve as pattern matching for expressions and switch instructions evolves. Improved data queries with pattern matching for Switch: This feature, which makes its final appearance in JDK 21 , expands the capabilities of expressions and switch statements, resulting in a more secure, expressive, and concise data-oriented querying mechanism. Revealing the Power of Virtual Threads: Finalized in JDK 21, virtual threads redefine competitive broadband applications. Providing near-seamless integration with the lang.Thread API and ensuring optimal scalability, this feature is poised to revolutionize concurrent programming. Sequence Collections – Filling the Gaps: With the introduction of Sequence Collections, JDK 21 fills the gaps in the framework Java Collections, providing a more unified and streamlined approach to managing collections. Redefine strings with string templates: Previewing string templates creates synergy between literal text and running calculations. This feature aims to improve readability, security, flexibility and simplification, particularly when working with strings derived from languages other than Java.
Furthermore, Microsoft wants to highlight the new version 0.2.9 of the Semantic Kernel for Java. Announced in July, this library will empower Java applications and serve as a valuable asset for developers to enhance the capabilities of new and existing applications with increased intelligence through the easy and idiomatic integration of LLMs and AI. Join us as we tackle this new chapter in Java development, where innovation meets functionality, and where we are committed to ensuring that Java remains a solid choice for developers everywhere. And if you can see us at Devoxx Belgium 2023 next week, check out our article Pioneering the Future of Java with Intelligent Apps.
Happy Java coding!
Source : Microsoft
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See as well :
The OpenJDK formulates a proposal aimed at making Java easier to learn for beginners through a feature of JDK 21 which is currently disabled by default
JDK 21: The First Release Candidate is available. The final version is announced for 09/19/2023
Spring Framework 6.1 released with improved compatibility with Virtual Threads and JDK 21
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