JEP 441, Pattern Matching for switch, has been promoted from Candidate to Proposed to Target for JDK 21. InfoQ will follow up with a more detailed news story.

The review is expected to conclude on May 12, 2023. Gavin Bierman, consulting member of technical staff at Oracle, has published the first draft of the specification document for review by the Java community. This feature JEP, formerly known as Flexible Main Methods and Anonymous Main Classes (Preview) and Implicit Classes and Enhanced Main Methods (Preview), proposes to 'evolve the Java language so that students can write their first programs without needing to understand language features designed for large programs.' This JEP moves forward the September 2022 blog post, Paving the on-ramp, by Brian Goetz, Java language architect at Oracle.

JEP 445, Unnamed Classes and Instance Main Methods (Preview), has been promoted from Candidate to Proposed to Target status for JDK 21. The review is expected to conclude on May 9, 2023. This feature proposes to enhance the Vector API to load and store vectors to and from a MemorySegment as defined by JEP 424, Foreign Function & Memory API (Preview). This JEP, under the auspices of Project Panama, incorporates enhancements in response to feedback from the previous five rounds of incubation: JEP 438, Vector API (Fifth Incubator), delivered in JDK 20 JEP 426, Vector API (Fourth Incubator), delivered in JDK 19 JEP 417, Vector API (Third Incubator), delivered in JDK 18 JEP 414, Vector API (Second Incubator), delivered in JDK 17 and JEP 338, Vector API (Incubator), delivered as an incubator module in JDK 16. JEP 448, Vector API (Sixth Incubator), has been promoted from Candidate to Proposed to Target for JDK 21. This week's Java roundup for May 1st, 2023, features news from OpenJDK, JDK 21, Spring Boot 3.1.0-RC2, Spring Modulith 0.6, Spring Cloud for Amazon Web Services 3.0.0, Spring Cloud Data Flow 2.10.3, Spring Tools 4.18.2, Infinispan 14.0.9.Final, Open Liberty 23.0.0.4, Quarkus 3.0.2 and 2.16.7, Helidon 3.2.1, Apache Camel 4.0.0-M3, Arquillian 1.7.0 and OptaPlanner transitions to Timefold.

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