JDK 17 is now in Rampdown Phase One

Deepak Damodaran deepak.n.damodaran at oracle.com
Mon Jun 14 12:17:58 UTC 2021

Per the JDK 17 schedule , we are in Rampdown Phase One [1].

Please advise if you find any issues while testing the latest Early Access builds.

  *   Schedule:
     *   2021/06/10       Rampdown Phase One
     *   2021/07/15        Rampdown Phase Two
     *   2021/08/05        Initial Release Candidate
     *   2021/08/19        Final Release Candidate
     *   2021/09/14        General Availability
The overall feature set is frozen. No further JEPs will be targeted to this release.

  *   Important JEPs have been integrated – Attention Required!

·         JEP 411: Deprecate the Security Manager for Removal<https://openjdk.java.net/jeps/411>

o    Deprecate, for removal, most Security Manager related classes and methods.

o    Warning message at startup if the Security Manager is enabled on the command line.

o    Warning message at run time if a Java application or library installs a Security Manager dynamically.

o    Deprecation is in concert with the legacy Applet API (JEP 398).

·         JEP 407: Remove RMI Activation<https://openjdk.java.net/jeps/407>

o    Removal the Remote Method Invocation (RMI) Activation mechanism, while preserving the rest of RMI.

o    It was deprecated for removal by JEP 385<https://openjdk.java.net/jeps/385> in Java SE 15.

·         JEP 403: Strongly Encapsulate JDK Internals<https://openjdk.java.net/jeps/403>

o    Strongly encapsulate all internal elements of the JDK, except for critical internal APIs such as sun.misc.Unsafe.

o    It will no longer be possible to relax the strong encapsulation of internal elements via a single command-line option.

  *   Other features integrated in JDK 17:
     *   JEP 306: Restore Always-Strict Floating-Point Semantics<https://openjdk.java.net/jeps/306>
     *   JEP 356: Enhanced Pseudo-Random Number Generators<https://openjdk.java.net/jeps/356>
     *   JEP 382: New macOS Rendering Pipeline<https://openjdk.java.net/jeps/382>
     *   JEP 391: macOS/AArch64 Port<https://openjdk.java.net/jeps/391>
     *   JEP 398: Deprecate the Applet API for Removal<https://openjdk.java.net/jeps/398>
     *   JEP 406: Pattern Matching for switch (Preview)<https://openjdk.java.net/jeps/406>
     *   JEP 409: Sealed Classes<https://openjdk.java.net/jeps/409>
     *   JEP 410: Remove the Experimental AOT and JIT Compiler<https://openjdk.java.net/jeps/410>
     *   JEP 412: Foreign Function & Memory API (Incubator)<https://openjdk.java.net/jeps/412>
     *   JEP 414: Vector API (Second Incubator)<https://openjdk.java.net/jeps/414>
     *   JEP 415: Context-Specific Deserialization Filters<https://openjdk.java.net/jeps/415>
OpenJDK 17 Early Access build 26 is 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<https://openjdk.java.net/legal/gplv2+ce.html>

  *   Release Notes are available at https://jdk.java.net/17/release-notes

  *   Changes in recent builds that maybe of interest:
  *   Build 26:

o    JDK-8268241: deprecate JVM TI Heap functions 1.0

o    JDK-8266846: Add java.time.InstantSource

o    JDK-8248268: Support KWP in addition to KW

o    JDK-8204686: Dynamic parallel reference processing support for Parallel GC

o    JDK-8259530: Generated docs contain MIT/GPL-licenced works without reproducing the licence [Reported by Apache Maven]

o    JDK-8266766: Arrays of types that cannot be an annotation member do not yield exceptions [Reported by ByteBuddy]

o    JDK-8266598: Exception values for AnnotationTypeMismatchException are not always informative [Reported by ByteBuddy]

·         Build 25
o    JDK-8266653: Change update mode for JDK rpm/deb installers as it breaks "yum update" for JDK11+
o    JDK-8263202: Update Hebrew/Indonesian/Yiddish ISO 639 language codes to current
o    JDK-8229517: Support for optional asynchronous/buffered logging
o    JDK-8182043: Access to Windows Large Icons

OpenJDK 18 Early Access build 1 is now available at https://jdk.java.net/18

  *   These early-access , open-source builds are provided under the
     *   GNU General Public License, version 2, with the Classpath Exception<https://openjdk.java.net/legal/gplv2+ce.html>

·         Issues addressed in this build - here<https://github.com/openjdk/jdk/compare/jdk-18%2B0...jdk-18%2B1>
Other Topics which might be of Interest:

  *   Java Cryptographic Roadmap [2] has been updated.
  *   Inside Java Newscast #6 [3]
     *   a closer look at the list of JEPs of JDK 17 as well as the development process
  *   Inside Java Podcast #7 [4]
     *   discusses in greater detail `pattern matching for switch`, previewed in JDK 17
Rgds, Deepak
[1] https://mail.openjdk.java.net/pipermail/jdk-dev/2021-June/005690.html <https://mail.openjdk.java.net/pipermail/jdk-dev/2021-June/005690.html>
[2] https://java.com/en/jre-jdk-cryptoroadmap.html
[3] https://inside.java/2021/06/10/insidejava-newscast-006/
[4] https://inside.java/2021/06/13/podcast-017/

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