Hi David, > so may I ask you to send me a brief email with the Java 21 support status of your project(s): Already supported - Plan to support short-term - Don't plan to support short-term ?
Apache Kafka: Java 21 is supported in trunk and will be part of the upcoming 3.7.0 release. Thanks, Ismael On Fri, Oct 20, 2023 at 2:37 AM David Delabassee < david.delabas...@oracle.com> wrote: > Greetings! > > JDK 21 has been released (General Availability) on September 19th as > planned. You can find "The Arrival of Java 21" announcement here [1], and > some additional Java 21 materials in the "Topics of Interest" section > below. On behalf of the entire Java team, let me send our thanks to all of > you. Through your active participation in this program, you are helping > shape the Java platform! > > Needless to say, that Java 21 is an important release, so may I ask you to > send me a brief email with the Java 21 support status of your project(s): > Already supported - Plan to support short-term - Don't plan to support > short-term ? > > And now that JDK 21 is out, let's shift our attention to JDK 22 which will > enter the Rampdown Phase in less than 50 days on December 7 [2]. > > I want to conclude this update by briefly mentioning three different > initiatives to are relevant to this group as they are, in their own way and > at various levels, contributing to adopt newer Java releases more rapidly: > the Class-File API, Oracle's Java Platform extension for VS Code, and the > Java Playground. > > ### The Class-File API > > The Class-File API is a new standard API for parsing, generating, and > transforming Java class files. One of its unique aspects is that it will > co-evolve with the class-file format, which overtime will greatly reduce > the friction of implementing new class-file features. With the fast-paced > evolution of the Java platform, this was much-needed. This API should soon > be previewed and as it matures, we expect the JDK to switch from using > various custom class-file libraries to this standard API. We also expect > that overtime frameworks relying on bytecode manipulation will also benefit > from using this new JDK class-file library. For more information, please > check this recent Newscast [3] for an overview, Brian Goetz's JVMLS session > [4] for more details and design considerations, and JEP 457: Class-File API > (Preview) [5] for the technical details. > > ### Oracle's Java Platform extension for Visual Studio Code > > Oracle has just announced [6] a new Visual Studio Code extension for Java > developers. Unlike other VS Code extensions, this new extension is using > under the hood the `javac` compiler for code editing and compilation, and > OpenJDK's debugger interface for debugging. This enables us to offer VS > Code IDE support for new JDK features as soon as they are introduced, even > during JDK Early Access phases. To this effect, this VS Code Extension will > support the current JDK releases as well as the next upcoming JDK version. > For more information, please check the announcement [6]. > > ### The Java Playground > > The Java Playground [7] is an online sandbox that helps testing and > exploring new Java language features. No setup required, just type your > Java snippet in your browser and run it! Right now, the Playground is using > Java 21 with Preview Features enabled, and it will switch to a new Java > version as soon as there is a new Java language features integrated in > OpenJDK Early-Access builds. The Playground is focusing mostly on Project > Amber and is certainly not mean to be some sort of a lightweight > online-IDE, it is instead a learning tool to play with new Java language > feature shortly after they have been integrated into the platform. > > [1] https://inside.java/2023/09/19/the-arrival-of-java-21/ > [2] https://mail.openjdk.org/pipermail/jdk-dev/2023-September/008269.html > [3] https://www.youtube.com/watch?v=bQ2Rwpyj_Ks > [4] https://www.youtube.com/watch?v=pcg-E_qyMOI > [5] https://openjdk.org/jeps/457 > [6] https://inside.java/2023/10/18/announcing-vscode-extension/ > [7] https://dev.java/playground > > > ## Heads-Up - JDK 22: Implicit Annotation Processing Behavior Change > > As discussed in the July 2023 Quality Outreach update [8], starting in JDK > 21 javac emits a note if _implicit_ annotation processing is being used, > that is, if one or more annotation processors are found and run from the > class path when no explicit annotation processing configuration options are > used. > > The note is reported since, quoting from the note text: "A future release > of javac may disable annotation processing unless at least one processor is > specified by name (-processor), or a search path is specified > (--processor-path, --processor-module-path), or annotation processing is > enabled explicitly (-proc:only, -proc:full)." > > That future version of javac has arrived in JDK 22 b19+ with JDK-8306819 > ("Consider disabling the compiler's default active annotation processing"). > In the situation where a note was emitted in JDK 21, in JDK 22 no note is > emitted, and annotation processors are *not* run. To restore the previous > behavior with respect to running annotation processors, add the > '-proc:full' javac option. > > Feedback on the annotation processing policy change can be sent to > compiler-dev [9]. > > [8] > https://mail.openjdk.org/pipermail/quality-discuss/2023-July/001122.html > [9] https://mail.openjdk.org/mailman/listinfo/compiler-dev > > > ## JDK 21 General Availability > > JDK 21, the reference implementation of Java 21, is now Generally > Available [10]. The OpenJDK GA 21.0.1 builds are available [11], and are > provided under the GNU General Public License v2, with the Classpath > Exception. The Release Notes [12] and the Javadocs [13] are also available. > > [10] https://mail.openjdk.org/pipermail/jdk-dev/2023-September/008267.html > [11] https://jdk.java.net/21/ > [12] https://jdk.java.net/21/release-notes > [13] https://docs.oracle.com/en/java/javase/21/docs/api/index.html > > > ## JavaFX 21 GA Builds & JavaFX 22 EA Builds > > Open-source builds of JavaFX 21 are now Generally Available [14], under > the GNU General Public License, version 2, with the Classpath Exception. > The Release Notes [15], and the JavaFX 21 API Javadocs [16] are also > available. > > The JavaFX runtime is delivered as an SDK and as a set of jmods for each > platform. You can use the SDK to compile and run JavaFX applications. You > can use the jmods with jlink to create a JDK that includes the JavaFX > modules, and optionally, your modular application. JavaFX 21 is designed to > work with JDK 21, but it is known to work with JDK 17 and later versions. > > In addition, the early access builds of the JavaFX 22 Runtime (builds 12) > are also available [17]. They enable JavaFX application developers to build > and test their applications with JavaFX 22 on JDK 22 EA. > > [14] https://jdk.java.net/javafx21/ > [15] > https://github.com/openjdk/jfx/blob/jfx21/doc-files/release-notes-21.md > [16] > https://download.java.net/java/GA/javafx21/69ca518c413e4df09f6be747a2400cf6/docs/api/index.html > [17] https://jdk.java.net/javafx22/ > > > ## JDK 22 Early-Access Builds > > The latest Early-Access builds 20 (2023/10/19) are available [18], and are > provided under the GNU General Public License v2, with the Classpath > Exception. The Release Notes are available here [19]. > > Changes in recent JDK 22 builds (b12-b20) that may be of interest: > (Note that this is only a curated list of changes, make sure to check [20] > for additional changes.) > > - JDK-8306819: Consider disabling the compiler's default active annotation > … > - JDK-8316691: Heap dump: separate stack traces for mounted virtual > threads … > - JDK-8317603: Improve exception messages thrown by sun.nio.ch.Net native > m… > - JDK-8312522: Implementation of Foreign Function & Memory API > - JDK-8296581: Better system proxy support > - JDK-8316994: Avoid modifying ClassLoader and Module objects during > -Xshar… > - JDK-8316970: Add internal annotation to mark restricted methods > - JDK-8301686: TLS 1.3 handshake fails if server_name doesn't match > resumin… > - JDK-8268622: Performance issues in javac Name class > - JDK-8317246: Cleanup java.net.URLEncoder and URLDecoder use of > file.encod… > - JDK-8311084: Add typeSymbol() API for applicable constant pool entries > - JDK-8316229: Enhance class initialization logging > - JDK-8315771: [JVMCI] Resolution of bootstrap methods with int[] static > arguments > - JDK-8316681: Rewrite URLEncoder.encode to use small reusable buffers > - JDK-8315810: Reimplement > sun.reflect.ReflectionFactory::newConstructorForSerialization with method > handles > - JDK-8296246: Update Unicode Data Files to Version 15.1.0 > - JDK-8316160: Remove > sun.misc.Unsafe.{shouldBeInitialized,ensureClassInitialized} > - JDK-8313452: Improve Classfile API attributes handling safety > - JDK-8314774: Optimize URLEncoder > - JDK-8246280: Refine API to model sealed classes and interfaces in > javax.lang.model > - JDK-8314960: Add Certigna Root CA > - JDK-8306632: Add a JDK Property for specifying DTD support > - JDK-8315938: Deprecate for removal Unsafe methods that have standard > APIs for many releases > - JDK-8041488: Locale-Dependent List Patterns > - JDK-8311939: Excessive allocation of Matcher.groups array > - JDK-8314569: (fs) Improve normalization of UnixPath for input with > trailing slashes > - JDK-8314611: Provide more explicative error message parsing Currencies > - JDK-8315117: Update Zlib Data Compression Library to Version 1.3 > - JDK-8313804: JDWP support for -Djava.net.preferIPv6Addresses=system > - JDK-8316681: Rewrite URLEncoder.encode to use small reusable buffers > > [18] https://jdk.java.net/22/ > [19] https://jdk.java.net/22/release-notes > [20] https://github.com/openjdk/jdk/compare/jdk-22%2B12...jdk-22%2B20 > > > ## New Jextract Early-Access Builds > > Jextract mechanically generates Java bindings from native library headers. > New Jextract EA builds are now available (Build 21-jextract+1-2 > (2023/9/25)) [21], those EA builds are based on JDK 21 and are intended for > expert users. > > [21] https://jdk.java.net/jextract/ > > > ## Topics of Interest: > > Java 21… and Beyond - Brian Goetz Devoxx 2023 Keynote > https://inside.java/2023/10/14/java-21-and-beyond/ > > JDK 21 Security Enhancements > https://seanjmullan.org/blog/2023/09/22/jdk21 > > With Java 21, Your Code Runs Even Faster but How is that Possible? > https://inside.java/2023/10/06/devoxx-your-code-runs-even-faster/ > > My Favorite JDK 21 Feature: Javadoc Search URL > > https://stuartmarks.wordpress.com/2023/09/22/my-favorite-jdk-21-feature-javadoc-search-url/ > > Upgrading from Java 17 to 21 #RoadTo21 > https://inside.java/2023/08/27/roadto21-upgrade/ > > Java 21 API Changes #RoadTo21 > https://inside.java/2023/09/10/roadto21-api/ > > Java 21 Security #RoadTo21 > https://inside.java/2023/09/13/roadto21-security/ > > Java 21 Tool Enhancements: Better Across the Board #RoadTo21 > https://inside.java/2023/09/06/roadto21-performance/ > > Java 21 JVM and GC Improvements #RoadTo21 > https://inside.java/2023/09/03/roadto21-performance/ > > Java 21 Brings Full Pattern Matching #RoadTo21 > https://inside.java/2023/09/17/roadto21-pattern-matching/ > > Java 21 new feature: Virtual Threads #RoadTo21 > https://inside.java/2023/08/30/roadto21-virtualthreads/ > > G1: Java's Default Garbage Collector > https://inside.java/2023/10/15/g1/ > > New candidate JEP: 457: Class-File API (Preview) > https://openjdk.org/jeps/457 > > Using JAXB in Custom Ant Tasks on Recent Java Versions > > https://jaitechwriteups.blogspot.com/2023/10/using-jaxb-in-custom-ant-tasks-on.html > > Java Records are "Trusted" and Consequently Faster > > http://minborgsjavapot.blogspot.com/2023/09/java-records-are-trusted-and.html > > JVMLS 2023 Keynote > https://inside.java/2023/09/14/jvmls-keynote/ > > JVMLS - Project Leyden > https://inside.java/2023/09/07/project-leyden/ > > JVMLS - Value Objects in Valhalla > https://inside.java/2023/09/05/value-objects-in-valhalla/ > > Complete JVMLS 2023 playlist > https://www.youtube.com/playlist?list=PLX8CzqL3ArzW90jKUCf4H6xCKpStxsOzp > > Teaching Old Streams New Tricks > https://inside.java/2023/10/11/devoxx-teaching-old-streams-new-tricks/ > > Support Markdown in javadoc Comments > https://mail.openjdk.org/pipermail/javadoc-dev/2023-October/006455.html > > Brian Goetz Answers Your Java Questions > https://inside.java/2023/10/20/ama-brian/ > > > ## October 2023 Critical Patch Update Released > > As part of the October 2023 CPU, Oracle released OpenJDK 21.0.1, JDK > 21.0.1, JDK 17.0.9 LTS, 11.0.21 LTS, 8u391, and 8u391-perf. > > > ~ > > PS: Don't forget to update me about your plans related to Java 21. > > Until next time! > > > --David >
