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Title: Java Development Heats Up: JDK 24 Enters Rampdown, JDK 25 Experts Assemble, and Jakarta EE 11 Core Profile Emerges
Introduction:
The Java ecosystem is buzzing with activity as we approach the end of 2024. This week’s news brings significant milestones:the impending release of JDK 24, the formation of the expert group for JDK 25, and the continued evolution of Jakarta EE with the 11 Core Profile. These developments signal a vibrant and forward-moving platform,constantly adapting to the needs of developers and the demands of modern applications. Let’s delve into the key updates.
JDK 24: Final Features Locked In as Release Nears
The development of Java Development Kit (JDK) 24 has reached a crucial stage. Mark Reinhold, chief architect of the Oracle Java Platform Group, has officially announced that JDK 24 has entered Rampdown Phase One. This signifies a major shift: the main source code repository has been forked into a stable repository dedicated to JDK 24.Crucially, this means no new Java Enhancement Proposals (JEPs) will be added to the feature set.
This freeze means that the final JDK 24 release, slated for General Availability (GA) in March 2025, will include a robust set of 24 JEPs. These include:
- Performance and Efficiency Enhancements:
- JEP 404: Generational Shenandoah (Experimental): An experimental update to the Shenandoah garbage collector, aiming for improved performance and reduced pause times.
- JEP 450: Compact Object Headers (Experimental): Exploring ways to reduce the memory footprint of objects, potentially leading to more efficient applications.
- JEP 475: G1 Post-Barrier Extension: Enhancements to the G1 garbage collector, further optimizing its performance.
*JEP 490: ZGC: Remove Non-Generational Mode: Simplifying the Z Garbage Collector by removing its non-generational mode. - JEP 491: Synchronized Virtual Threads Without Pinning: Allowing virtual threads to be synchronized without beingpinned to an underlying OS thread, improving scalability.
- JEP 483: Early Class Loading and Linking: Optimizing application startup by loading and linking classes earlier.
- Language and API Improvements:
- JEP 478: Key Derivation FunctionAPI (Preview): Providing a standardized API for key derivation functions, crucial for security.
- JEP 484: Class-File API: Introducing a new API for working with class files.
- JEP 485: Stream Collectors: Extending the Stream API with new collectors for more efficient data processing.
- JEP 487: Range Values (Fourth Preview): Further refining the range value feature.
- JEP 488: Primitive Types in Patterns, instanceof, and switch (Second Preview): Enhancing pattern matching with primitive types.
- JEP 489: Vector API (Ninth Incubator): Continuing the incubation of the Vector API for optimized SIMD operations.
- JEP 492: Flexible Constructor Bodies (Third Preview): Providing more flexibility in defining constructor bodies.
- JEP 494: Module Import Declarations (Second Preview): Refining the module import declaration feature.
- JEP 495: Simple Source-File and Instance Main Methods (Fourth Preview): Further refining the feature for simpler main methods.
- Security and Platform Updates:
- JEP 472: Prepare to Restrict JNI Usage: Taking steps to reduce the potential risks associated with Java Native Interface (JNI).
- JEP 479: Remove Windows 32-bit x86 Port: Removing support for the 32-bit Windows platform.
- JEP 486: Permanently Disable Security Manager: Disabling the Security Manager, a legacy feature.
*JEP 493: Link Runtime Images Without JMOD: Allowing runtime images to be linked without the use of JMOD files. - JEP 496: Quantum-Resistant Module-Lattice-Based Key Encapsulation Mechanism: Adding support for quantum-resistant key encapsulation.
- JEP 497: Quantum-Resistant Module-Lattice-Based Digital Signature Algorithm: Adding support for quantum-resistant digital signatures.
JDK 25: Expert Group Assembled
While JDK 24 is nearing release, workis already underway for JDK 25. The formation of the JDK 25 expert group marks the beginning of the next development cycle. This group will be responsible for defining the features and direction of the next major Java release. The specific JEPs to be included in JDK 25 are yet tobe determined, but the formation of the expert group is a crucial first step.
Jakarta EE 11 Core Profile: Continuing Evolution
The Jakarta EE ecosystem is also seeing significant progress. The Jakarta EE 11 Core Profile is a key development, focusing on a streamlined set of specifications for modern application development. This profile aims to provide a lightweight and efficient foundation for building cloud-native applications. The continued evolution of Jakarta EE demonstrates the platform’s commitment to adapting to the demands of contemporary software development.
Other Notable Updates:
In addition to the major developments, the week also saw new releases from key Javaprojects and frameworks:
- GlassFish
- Open Liberty
- Quarkus
- Apache Camel
- Spring Cloud 2024.0.0
These releases highlight the continued activity and innovation within the broader Java community.
Conclusion:
The Java landscape is dynamicand continues to evolve at a rapid pace. The upcoming release of JDK 24 with its 24 JEPs, the formation of the JDK 25 expert group, and the progress of Jakarta EE 11 Core Profile all point to a robust and innovative future for the platform. These advancements not onlyimprove performance and security but also provide developers with the tools they need to build cutting-edge applications. The Java community remains vibrant, demonstrating its commitment to continuous improvement and adaptation. The coming months will undoubtedly bring further exciting developments as these projects progress.
References:
- InfoQ Article: [Linkto the original InfoQ article] (Note: You would need to replace this with the actual URL)
- JDK 24 Release Notes: [Link to JDK 24 Release Notes] (Note: You would need to replace this with the actual URL)
- JEPs (Java EnhancementProposals): [Link to official JEP website] (Note: You would need to replace this with the actual URL)
- Jakarta EE Website: [Link to Jakarta EE Website] (Note: You would need to replace this with the actual URL)
Note: I have included placeholders for the actual URLsof the references. You would need to replace these with the correct links. I have also used a general citation style, but you can adapt it to APA, MLA, or Chicago as needed.
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