OpenJDK 17 Early Access build 16 is now available

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OpenJDK 17 Early Access build 16 is now available

Rory O'Donnell

Hi Dominik,

*OpenJDK 17 Early Access build 16 is now available at
*** <>

  * These early-access , open-source builds are provided under the
      o GNU General Public License, version 2, with the Classpath
        Exception <>

  * Schedule (proposed)
      o 2021/06/10         Rampdown Phase One
      o 2021/07/15         Rampdown Phase Two
      o 2021/08/05         Initial Release Candidate
      o 2021/08/19         Final Release Candidate
      o 2021/09/14         General Availability

  * Features:*Heads-up on an important Candidate JEP
      o *Candidate - JEP 403: **Strongly Encapsulate JDK Internals
      o successor to JEP 396: Strongly Encapsulate JDK Internals by
        Default <>
      o strongly encapsulate all internal elements of the JDK by default
      o exception for Critical Internal APIs such as /sun.misc.Unsafe/

  * JEPs targeted to JDK 17, so far:
      o JEP 356: Enhanced Pseudo-Random Number Generators
      o JEP 382: New macOS Rendering Pipeline
      o JEP 391: macOS/AArch64 Port <>
      o JEP 398: Deprecate the Applet API for Removal

  * Release Notes are available at
  * Changes in recent builds that maybe of interest:
      o Build 16
          + JDK-8263898: (fs) Files.newOutputStream on the "NUL" special
            device throws FileSystemException: "nul: Incorrect function"
              # Reported by Apache Ant
      o Build 15
          + JDK-8263575: Conflict between JDK rpms and OL8 Modularity
            prevents dnf install/updates
      o Build 14
          + JDK-8262277: URLClassLoader.getResource throws undocumented
          + JDK-8262351: Extra '0' in java.util.Formatter for '%012a'
            conversion with a sign character

*Project Loom Early-Access Build: **Build 17-loom+5-191*

  * 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 [hidden email]
    <mailto:[hidden email]>. To send e-mail to this address
    you must first subscribe to the mailing list

*Quality Report for March 2021 was published here [1]*.

  * Thanks to everyone who contributed by creating features or
    enhancements, logging  bugs, or downloading and testing the
    early-access builds.

*Worth reading - **The Arrival of Java 16!

  * JDK 16 Migration guide -
  * #AllTestsGreenOnJDK16 - If your tests are green on JDK 16 please
    respond to this *tweet
  * Oracle Developer Live event - Individual sessions:
     1. *Java 16: Consistency and Innovation* (Aurelio Garcia-Ribeyro): <>
     2. *Java Language Futures: Spring 2021* (Gavin Bierman): <>
     3. *Ask the Java Architects* (Mark Reinhold, Brian Goetz, Mikael
        Vidstedt, Ron Pressler):
     4. *Learn Java 16 with IntelliJ IDEA *(Trisha Gee[JetBrains])*:
        * <>**
     5. *How Records Can Improve Serialization* (Julia Boes, Chris
     6. *Vector API: SIMD Programming in Java* (Paul Sandoz, Sandhya
     7. *Your Guide to OpenJDK Development* (Jesper Wilhelmsson): <>
     8. *Project Skara: Migrating OpenJDK to Git and GitHub* (Erik
        Duveblad, Robin Westberg):
     9. *Monitoring and Troubleshooting Tools in the JDK* (Poonam
        Parhar): <>
    10. *Fast and Efficient Microservices for Java with GraalVM* (Alina
    11. *Accelerating Productivity with Micronaut and Java Records*
        (Graeme Rocher):
    12. *Scalable Microservices for Java using Helidon and Coherence CE*
        (Dmitry Aleksandrov, Aleks Seović):
    13. *Cross-Platform User Interfaces, Developed with Java & OpenJFX
        Project* (Johan Vos [Gluon]):



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