JDK 17 Early Access build 23 is available

[Rory O'Donnell]

Hi Oleg,

OpenJDK 17 Early Access build 23 is now available at https://jdk.java.net/17

• These early-access , open-source builds are provided under the
• GNU General Public License, version 2, with the Classpath Exception
• JEPs targeted to JDK 17, so far:
• JEP 356: Enhanced Pseudo-Random Number Generators
• JEP 382: New macOS Rendering Pipeline
• JEP 391: macOS/AArch64 Port
• JEP 398: Deprecate the Applet API for Removal
• JEP 409: Sealed Classes
• JEP 410: Remove the Experimental AOT and JIT Compiler
• JEP 412: Foreign Function & Memory API (Incubator)
• JEP 414: Vector API (Second Incubator)
• Release Notes are available at https://jdk.java.net/17/release-notes
• Changes in recent builds that maybe of interest:
• Build 23
• JDK-8243287: Removal of Unsafe::defineAnonymousClass.
• Build 22
• JDK-8266369: New implementation of java.nio.channels.Selector on Microsoft Windows.
• Build 21
• JDK-8196415: JARs signed with SHA-1 algorithms are restricted by default.
• JDK-8266858: macOS on ARM early access available.
• The ARM port should behave similarly to the Intel port. There are no known feature differences.
• When reporting issues on macOS please specify if using ARM or x64.

We need your help in testing new Selector implementation on Windows [1]:

• The implementation of the Selector API on Windows has been replaced in JDK 17 b22 with a new more scalable implementation [2].
• The old select based Selector implementation has been the default since Java 1.4 (2002) so replacing it is a significant change.
• It would be really helpful to get more testing of the new implementation before the fork for Rampdown Phase One on June 10th.

Other Topics which might be of Interest:

• Updates to JEP 411: Deprecate the Security Manager for Removal | Link
• "The meaning, or not, of “LTS” | Link
• JFR Remote Recording Stream | Link

Project Loom Early-Access Build: Build 17-loom+7-342 (2021/5/11)

• These early-access builds are provided under the GNU General Public License, version 2, with the Classpath Exception.
• These builds are produced for the purpose of gathering feedback. Use for any other purpose is at your own risk.
• Please send feedback via e-mail to loom...@openjdk.java.net.To send e-mail to this address you must first subscribe to the mailing list.

Project Panama Early-Access Build: Build 17-panama+3-167 (2021/5/18)

• These early-access builds are provided under the GNU General Public License, version 2, with the Classpath Exception.
• This build is aimed at testing a prototype implementation of the foreign memory support, foreign function support and native extraction tooling from the "foreign-jextract" branch of the Panama repo.
• Please send feedback via e-mail to panam...@openjdk.java.net. To send e-mail to this address you must first subscribe to the mailing list.

Rgds,Rory


[1] https://mail.openjdk.java.net/pipermail/nio-dev/2021-May/008988.html
[2] https://bugs.openjdk.java.net/browse/JDK-8266369

-- 
Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland