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InfoQ Homepage News Java News Roundup: JDK 20 in Rampdown Phase 2, New JEP Drafts, JobRunr 6.0, GraalVM 22.3.1

Java News Roundup: JDK 20 in Rampdown Phase 2, New JEP Drafts, JobRunr 6.0, GraalVM 22.3.1

This week's Java roundup for January 23rd, 2023, features news from OpenJDK, JDK 20, JDK 21, GraalVM 22.3.1, TornadoVM 0.15, Spring Cloud Azure 5.0, Spring Shell 3.0.0 and 2.1.6, Spring Cloud 2022.0.1, Quarkus 2.16 and 3.0.Alpha3, Micronaut 3.8.3, JobRunr 6.0, MicroStream 8.0-EA2, Hibernate 6.2.CR2, Tomcat 10.1.5, Groovy 4.0.8 and 2.5.21, Camel Quarkus 2.16, JDKMon 17.0.45 and at FOSDEM.


Angelos Bimpoudis, principal member of technical staff for the Java Language and Tools team at Oracle, has updated JEP Draft 8288476, Primitive types in patterns, instanceof, and switch. This draft, under the auspices of Project Amber, proposes to enhance pattern matching by allowing primitive types to appear anywhere in patterns.

Alex Buckley, specification lead for the Java language and the Java Virtual Machine at Oracle, has introduced JEP Draft 8300684, Preview Features: A Look Back, and A Look Ahead. This draft proposes to review the preview process that was introduced as JEP 12, Preview Features, for potential continuous improvement of the process.

Wei-Jun Wang, principal member of the technical staff at Oracle, has introduced JEP Draft 8301034, Key Encapsulation Mechanism API, a feature JEP that proposes to: satisfy implementations of standard Key Encapsulation Mechanism (KEM) algorithms; satisfy use cases of KEM by higher level security protocols; and allow service providers to plug-in Java or native implementations of KEM algorithms.

Archie Cobbs, founder and CEO at PatientEXP, has introduced JEP Draft 8300786, No longer require super() and this() to appear first in a constructor. This draft, also under the auspices of Project Amber, proposes to: allow statements that do not reference an instance being created to appear before the this() or super() calls in a constructor; and preserve existing safety and initialization guarantees for constructors.

JDK 20

As per the JDK 20 release schedule, Mark Reinhold, chief architect, Java Platform Group at Oracle, formally declared that JDK 20 has entered Rampdown Phase Two to signal continued stabilization for the GA release in March 2023. Critical bugs, such as regressions or serious functionality issues, may be addressed, but must be approved via the Fix-Request process.

The final set of six (6) features in JDK 20 will include:

Build 33 of the JDK 20 early-access builds was made available this past week, featuring updates from Build 32 that include fixes to various issues. More details on this build may be found in the release notes.

JDK 21

Build 7 of the JDK 21 early-access builds was also made available this past week featuring updates from Build 6 that include fixes to various issues. More details on this build may be found in the release notes.

For JDK 20 and JDK 21, developers are encouraged to report bugs via the Java Bug Database.


Oracle has released the Community Edition of GraalVM 22.3.1 that aligns with the January 2023 edition of the Oracle Critical Patch Update Advisory. This release includes the updated versions of OpenJDK 19.0.2, 17.0.6 and 11.0.18, and Node.js 16.18.1. More details on this release may be found in the release notes.


TornadoVM, an open-source software technology company, has released TornadoVM version 0.15 that ships with a new TornadoVM API with improvements such as: rename the TaskSchedule class to TaskGraph; and new classes, ImmutableTaskGraph and TornadoExecutionPlan, to optimize an execution plan for running a set of immutable task graphs. This release also includes an improved TornadoVM installer for Linux, an improved TornadoVM launch script with optional parameters and a new website for documentation.

Juan Fumero, research associate, Advanced Processor Technologies Research Group at The University of Manchester, introduced TornadoVM at QCon London in March 2020 and has since contributed this more recent InfoQ technical article.

Spring Framework

The release of Spring Cloud Azure 5.0 delivers: support for Spring Boot 3.0 and Spring Cloud 2022.0.0; improved security with passwordless connections; and redesigned Spring Cloud Azure documentation with improved scenarios. This version also includes upgrades to some of the deprecated APIs.

Versions 3.0.0 and 2.1.6 of Spring Shell have been released featuring compatibility with Spring Boot 3.0.2 and 2.7.8, respectively, along with backported bug fixes and improved handling of position arguments and collection types. More details on these releases may be found in the release notes for version 3.0.0 and version 2.1.6.

Spring Cloud 2022.0.1, codenamed Kilburn, has been released that ships with corresponding point releases of Spring Cloud sub-projects such as Spring Cloud Function, Spring Cloud Commons and Spring Cloud Gateway. This release is compatible with Spring Boot 3.0.2. More details on this release may be found in the release notes.


The release of Quarkus 2.16.0.Final delivers new features such as: support for time series operations and data preloading in the Redis extension; support for custom exception handling and xDS in the gRPC extension; improved configuration flexibility for the Cache extension; and several security-related improvements focused on improving the developer experience. More details on this release may be found in the changelog.

The third alpha release of Quarkus 3.0.0 features a third iteration of their Jakarta EE 10 stream that includes: the collective improvements of versions 2.15.0.Final, 2.15.1.Final, 2.15.2.Final, 2.15.3.Final and 2.16.0.Final; a migration to SmallRye Mutiny 2.0 and the Java Flow API; and a simplified handling of Kotlin by the Quarkus classloader designed to ease development on Kotlin-based Quarkus extensions. More details on this release may be found in the release notes.


The Micronaut Foundation has released Micronaut 3.8.3 featuring bug fixes and updates to modules: Micronaut OpenAPI and Micronaut Oracle Cloud. More details on this release may be found in the release notes.


After three milestone releases, version 6.0 of JobRunr, a utility to perform background processing in Java, has been released to the Java community. New functionality and improvements include: support for Spring Boot 3.0; Job Builders that provide a single API to configure all the aspects of a Job class via a builder pattern instead of using the @Job annotation; Job Labels such that jobs can be assigned labels that will be visible in the dashboard; allow for multiple instances of the JobScheduler class with different table prefixes inside one application; an update of all transitive dependencies; and improvements in performance and stability. More details on this release may be found in the release notes.


MicroStream has provided a version 8.0 preview of their Java-native object graph persistence layer. This second early-access release features: a move to JDK 11 with continued support for JDK 8; a read-only mode such that multiple processes can access the same storage; experimental implementations of ArrayList, HashMap and HashSet that are using a sharing mechanism; and improved integrations with Spring Boot and Quarkus.


The second release candidate of Hibernate ORM 6.2 implements a number of bug fixes based on Java community feedback from the first candidate release of Hibernate ORM 6.2. As a result, the SQL Abstract Syntax Tree, the ANTLR-based parser for their Hibernate Query Language, has been stabilized and the SQL MERGE command can now handle updates against optional tables.

Apache Software Foundation

Apache Tomcat 10.1.5 has been released with notable changes such as: correct a regression in the refactoring that replaced the use of the URL constructors; use the HTTP/2 error code, NO_ERROR, so that the client does not discard the response upon resetting an HTTP/2 stream; and change the default of the system property, GET_CLASSLOADER_USE_PRIVILEGED, to true unless the Expression Language library is running on Tomcat. More details on this release may be found in the changelog.

The release of Apache Groovy 4.0.8 delivers bug fixes and enhancements such as: improve the JaCoCo line code coverage of a Groovy assert statement; and introduce variants of the findAll() and findResults() methods to accept an optional collector argument. More details on this release may be found in the changelog.

Similarly, the release of Apache Groovy 2.5.21 ships with bug fixes and a dependency upgrade to ASM 9.4. More details on this release may be found in the changelog.

Maintaining alignment with Quarkus, version 2.16.0 of Camel Quarkus was released that aligns with Camel 3.20.1 and Quarkus 2.16.0.Final. It delivers support for four DSLs: JavaShell, Kotlin, Groovy and jOOR. More details on this release may be found in the release notes.


Version 17.0.45 of JDKMon, a tool that monitors and updates installed JDKs, has been made available this past week. Created by Gerrit Grunwald, principal engineer at Azul, this new version fixes an issue with download dialogs. at FOSDEM 2023

The Friends of OpenJDK,, a community platform for the Java ecosystem​, has announced that they will be hosting their own developer rooms at the upcoming FOSDEM 2023 conference scheduled for Saturday-Sunday, February 4-5, 2023.

FOSDEM, a two-day event organized by volunteers to promote the widespread use of free and open source software, will be providing a number of tracks and other developer rooms, AKA devrooms, hosted by other organizations and communities.

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