Java 17 Release

Transcript

1. Java 17
   Das neue LTS Release is da!
   

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2. Safe Harbor Statement
   The following is intended to outline our general product direction. It is intended
   for information purposes only, and may not be incorporated into any contract. It
   is not a commitment to deliver any material, code, or functionality, and should
   not be relied upon in making purchasing decisions. The development, release,
   and timing of any features or functionality described for Oracle’s products
   remains at the sole discretion of Oracle.
   

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3. This is a very very very long gag
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   Wolfgang Weigend
   • Wolfgang Weigend
   
   
   • Master Principal Solution Engineer
   
   
   • Global Java Team
   
   
   • Java Technology & GraalVM
   

   Architecture
   

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4. This is a very very very long gag
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   Hendrik Ebbers
   • Karakun Co-Founder
   
   
   • Founder of JUG Dortmund
   
   
   • JSR EG member
   
   
   • JavaOne Rockstar, Java Champion
   
   
   • AdoptOpenJDK / Adoptium TSC member
   

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5. This is a very very very long gag
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   Hendrik Ebbers
   • I (and collect) boardgames
   
   
   • I STARWARS
   
   
   • I Hardrock
   
   
   • I Dogs
   

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6. PARTY
   Java 17
   Cyberlan
   d
   

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7. Wer von euch hat wohl das
   älteste JAVA Programm?
   
   
   TagebuchApplet.java
   
   
   AWTodo_v45.java
   

   MyFirstStrutsAction.java
   cyberland@ijug.eu
   https://cyberland.ijug.eu
   

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8. Heute Abend gehts AB!!1!!
   
   
   19:00
   nur echt auf YouTube
   ... wenn YouTube klappt
   *
   *
   https://cyberland.ijug.eu
   

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9. https://www.menti.com/gn91fpftpx
   Mach mit und gewinne
   exklusiven SWAG
   Nicht Hendrik! Das Shirt meinen wir!
   The voting code 8616 0213
   

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10. This is a very very very long gag
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    Content
    • History recall
    
    
    • OpenJDK
    
    
    • Java release model
    
    
    • Java Features
    
    
    • Migration
    
    
    • Future of OpenJDK
    

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14. This is a very very very long gag
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    The wild 90th
    • "Oak" (Object Application Kernel) / "The Green
    Project" was developed in 1992
    
    
    • This project evolved to Java in 1995
    
    
    • The Duke was already the
    

    mascot for the
    

    Green Project
    

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15. This is a very very very long gag
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    The
    fi
    rst Java years
    • Java versions 1 till 6 were released at SUN
    
    
    • Java 1 was released 1996
    
    
    • Java 6 was released 2006
    
    
    • In 1998 the JCP (Java Community
    

    Process) was formed
    

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16. This is a very very very long gag
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    The takeover
    • In 2009 SUN was bought by Oracle
    
    
    • The Java community was really
    

    afraid about this move
    
    
    • Mostly no-one associated Oracle with
    

    open source
    

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17. JavaOne 2009
    “Based on the foundation created here at Sun,
    we have invested heavily, and I think
    

    we’re going to continue to invest and
    accelerate our investment”
    

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18. JavaOne 2009
    “Our whole next generation of business
    applications is built entirely on Java”
    

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19. JavaOne 2009
    “Java was a very attractive platform for us
    because it was open, and it allowed us to
    extend the platform”
    

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20. 27th of January 2010
    “Java is going to grow”
    

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23. This is a very very very long gag
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    Java getting old?
    • Big plans at SUN
    
    
    • Realisation at Oracle splitter in 2
    

    releases
    
    
    • JDK 7 (Security)
    
    
    • JDK 8 (Lambdas & Streams)
    

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24. This is a very very very long gag
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    Not your daddies Java
    • Functional programming FTW
    
    
    • Lambdas & Streams everywhere
    
    
    • Modularization of the JDK
    
    
    • Modularization of libs & apps
    
    
    • Keep up with the languages
    Dad Duke 2005
    

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25. This is a very very very long gag
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    The last years
    • Oracle managed to provide
    

    major updates of Java
    
    
    • Continued to evolve Java by the JCP
    
    
    • Not everything is perfect but
    

    much better than it was expected
    

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26. This is a very very very long gag
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    Java History Milestones
    Java initiated
    as research
    project at Sun
    Java powers the
    web; bundled
    with the
    Netscape
    browser
    Java becomes #1
    programming
    language for
    enterprise
    applications
    Sun open
    sources Java
    1991 1995 1999 2006
    Java 7 –
    extending JVM
    to dynamic
    programming
    languages
    Java 9 –
    modular Java
    
    
    Java 14 and Java
    15
    2011 2017 2020
    Oracle acquires
    Sun
    2009
    Java 10 –
    start of
    predictable
    release
    cadence
    
    
    2018
    

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27. Java in a Nutshell
    

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28. This is a very very very long gag
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    Java in a nutshell
    Standard APIs
    Tools
    JVM
    

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29. This is a very very very long gag
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    The JVM
    • The "heart" of the Java platform
    
    
    • De
    fi
    nition of Java language features
    
    
    • De
    fi
    nition of Java runtime
    
    
    • Since 2000 just-in-time-compilation (HotSpot)
    

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30. This is a very very very long gag
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    The standard APIs
    • Java Class Library (JCL) is a set of dynamically loadable
    libraries
    
    
    • Will be called at runtime
    
    
    • Almost entirely written in Java (some JNI calls to
    hardware & OS)
    

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31. This is a very very very long gag
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    The standard APIs
    • Since Java 9 the standard APIs are separated in several
    modules java.se
    java.sql.rowset
    java.sql
    java.xml
    java.base
    java.logging
    java.instrument java.datatransfer java.scripting
    java.prefs
    java.desktop
    java.xml.crypto
    java.compiler
    java.rmi java.naming
    java.security.sasl
    java.management java.security.jgss
    

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32. This is a very very very long gag
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    The (evil) private APIs
    • Java contains some private Java APIs
    
    
    • This APIs should not be used in framework /
    application code
    
    
    • Private APIs can be changed at anytime
    

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33. This is a very very very long gag
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    The (evil) private APIs
    • Some rules about private APIs
    
    
    • Do not use anything besides the java.* package
    
    
    • Swing and Graphics2D is located in the javax.*
    package
    
    
    • JavaFX is located in the javafx.* package
    

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34. This is a very very very long gag
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    The (evil) private APIs
    • JDK 9 till JDK 15 defaults to --illegal-access=warn
    
    
    • JDK 16 defaults to --illegal-access=deny
    
    
    • JDK 17 disables permit, warn & debug values for illegal-
    access option
    
    
    • It is still possible to use --add-opens or the Add-Opens
    manifest attribute
    
    
    

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35. This is a very very very long gag
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    The tools
    • Each Java distribution contains a large set of tools
    
    
    • Some are part of OpenJDK
    
    
    • Some are vendor speci
    fi
    c
    

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36. This is a very very very long gag
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    The tools
    • Basic tools like the java or javac command are part
    of each JDK distribution
    
    
    • Oracle added several tools to its Java distribution that
    are not part of OpenJDK
    
    
    • All this tools were developed closed source at Oracle
    

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37. This is a very very very long gag
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    The tools
    • A good example is "Java WebStart"
    
    
    • WebStart was never part of OpenJDK and therefore
    was never part of OpenJDK builds
    
    
    • WebStart was only delivered with Oracle JDK builds
    

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38. This is a very very very long gag
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    Oracle JDK & OpenJDK
    OpenJDK 8
    JVM, tools, etc. JVM, tools, etc.
    Exclusive Oracle
    stu
    f
    eg. Flight recorder
    
    
    WebStart
    
    
    Mission Control
    Oracle JDK 8
    

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39. This is a very very very long gag
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    Java getting old?
    OpenJDK 12 Oracle JDK 12
    JVM, tools, etc.
    equals
    JVM, tools, etc.
    

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40. This is a very very very long gag
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    Oracle JDK & OpenJDK
    • Oracle wants to have the content of Oracle JDK (more
    or less) be equal to OpenJDK
    
    
    • Therefore Oracle contributed some of the previews
    content of Oracle JDK to OpenJDK
    
    
    • Tools like Flight Recorder were open sourced
    

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41. OpenJDK
    

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42. This is a very very very long gag
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    OpenJDK
    • Java has been open sourced
    

    in 2006
    
    
    • SUN derived OpenJDK from
    

    SunJDK as a vendor JDK
    
    
    • Oracle JDK is derived from OpenJDK
    
    
    • Oracle took over the work at
    

    OpenJDK and many companies
    

    followed...
    

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44. This is a very very very long gag
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    OpenJDK Groups & Projects
    Core Libraries Group
    2D Graphics Group
    HotSpot Group
    OpenJFX Project
    JDK Project
    Panama Project
    

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45. This is a very very very long gag
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    Contribution to OpenJDK
    • Since OpenJDK is an open source project everybody
    can contribute
    
    
    • Both individuals and companies contribute to
    OpenJDK
    
    
    • Oracle still does over 75% of all contributions for the
    OpenJDK
    

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46. This is a very very very long gag
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    Contribution to OpenJDK
    • Happily more and more
    people of the Java
    community contribute to
    OpenJDK
    
    
    • Sadly Good tutorials and
    'Getting started' guides are
    missing
    We are working on that issue
    

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47. This is a very very very long gag
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    Companies that contributed in 11
    

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48. This is a very very very long gag
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    Companies that contributed in 16
    

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49. This is a very very very long gag
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    Companies that contribute
    • Alibaba
    
    
    • Amazon
    
    
    • Ampere Computing
    
    
    • ARM
    
    
    • Azul
    
    
    • Bellsoft
    
    
    • DataDog
    
    
    • Google
    
    
    • Huawai
    
    
    • IBM
    
    
    • Intel
    
    
    • JetBrains
    
    
    • Linaro
    
    
    • Longsoon
    
    
    • Microdoc
    
    
    • Microsoft
    
    
    • NTT Data
    
    
    • Qualcomm DCT
    
    
    • RedHat
    
    
    • SAP
    
    
    • Tencent
    
    
    • Twitter
    

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50. This is a very very very long gag
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    OpenJDK Distributionen
    Azul Zulu
    Oracle JDK
    Amazon Coretto
    AdoptOpenJDK
    Bellsoft Liberica
    Red Hat Upstream
    Adoptium Temurin
    

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51. This is a very very very long gag
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    Oracle Contributor Agreement
    • The following organizations and
    individuals have signed the OpenJDK
    Community TCK Agreement (OCTLA)
    and been granted access to the JCK
    *
    *
    * TCK - Test Compatibility Kit
    
    
    JCK - Java Compatibility Kit
    

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52. This is a very very very long gag
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    OpenJDK and Java Ownership
    • Java is a registered trademark of
    Oracle
    
    
    • OpenJDK is named independently
    
    
    • Access to the TCK is restricted
    
    
    • TCK access requires to sign the
    OCTLA
    

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53. This is a very very very long gag
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    OCTLA Signatories List (Java 9+)
    • Amazon.com Services, Inc.
    
    
    • Ampere Computing LLC
    
    
    • Azul Systems, Inc.
    
    
    • BellSoft
    
    
    • Canonical
    
    
    • Eclipse.org Foundation
    
    
    • The FreeBSD Foundation
    
    
    • Fujitsu Limited
    
    
    • Fujitsu Technology Solutions
    GmbH
    
    
    • Greg Lewis
    
    
    • Hewlett Packard Enterprise
    
    
    • J-Class Solutions, Inc.
    
    
    • JetBrains s.r.o.
    
    
    • Loongson Technology Co.,
    Ltd.
    
    
    • Marvell Semiconductor Inc.
    
    
    • MicroDoc Software GmbH
    
    
    • Microsoft
    
    
    • NCIT UNIPRO, LLC.
    
    
    • OpenLogic, Inc.
    
    
    • Red Hat
    
    
    • Sage Embedded Software LLC
    
    
    • SAP
    
    
    • SUSE Linux GmbH
    
    
    • Tencent Technology
    (Shenzhen) Co Ltd
    
    
    • Twitter
    
    
    • VMWare
    
    
    • Waratek Limited
    

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54. This is a very very very long gag
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    OpenJDK and Java Ownership
    • OpenJDK or substantially projects
    only
    
    
    • OCTLA did not allow to disclose TCK
    information to Non-OCTLA licensees
    
    
    • OCTLA is not a trademark license
    
    
    • OpenJDK could be used according to
    the OpenJDK Trademark Notice
    

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55. Java Roadmap
    

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56. This is a very very very long gag
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    The classical Java releases
    • Up until Java 8 we had a
    fl
    exible release train for Java
    
    
    • A new major version was released "when it's done"
    
    
    • This ended in delays and a a big bundle of new
    features per release
    

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57. This is a very very very long gag
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    The classical Java releases
    • A version was available for several years
    
    
    • Normally a version received updates even after the
    next version was released
    
    
    • Commercial LTS support was provided by Oracle for
    legacy projects
    

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58. This is a very very very long gag
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    Oracle Java roadmap
    2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
    Java 6
    Java 7
    Java 8
    Free
    

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59. This is a very very very long gag
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    Oracle Java roadmap
    2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
    Java 6
    Java 7
    Java 8
    Free
    Commercial
    

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60. This is a very very very long gag
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    The new release train
    • Beginning with Java 9 Oracle announced the new
    release train
    
    
    • More
    fl
    exible with
    fi
    xed release dates
    
    
    • A feature will be released "when it's done"
    
    
    • Shorter lifetime of Java versions
    

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61. This is a very very very long gag
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    The new release train
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Basic version
    LTS version
    

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62. This is a very very very long gag
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    The new release train
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    free version
    commercial
    version
    Some vendors provide LTS
    for production only by
    support subscription
    

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63. This is a very very very long gag
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    The new release train
    free version
    Preferred for
    LTS
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    2018 2019 2020
    Java 8
    Java 15
    Java 16
    Java 17
    Java 18
    Java 19
    Java 20
    Java 21
    Java 22
    2021 2022 2023
    Java 23
    Java 24
    Java 25
    2024
    

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64. This is a very very very long gag
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    The new release train (Oracle)
    • Starting with Java 11 Oracle provides 2 Java builds
    
    
    • Oracle JDK is the commercial distribution
    
    
    • Oracle OpenJDK builds still provided under GPL with
    classpath exception
    

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65. This is a very very very long gag
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    Oracle JDK distribution
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    Java 15
    2018 2019 2020
    Java 8
    Free
    Commercial LTS
    Not Free in Prod
    

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66. This is a very very very long gag
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    Oracle OpenJDK distribution
    Java 9
    Java 10
    Java 11
    Java 12
    Java 13
    Java 14
    Java 15
    2018 2019 2020
    Java 8
    Free
    

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67. This is a very very very long gag
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    The new release train
    • At the end the OpenJDK only de
    fi
    nes the major
    releases
    
    
    • Every vendor can provide distributions, LTS and
    support based on individual needs
    
    
    • Azul for example provides Medium-Term-Support
    (MTS) for some versions like Java 13 or 15
    

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68. This is a very very very long gag
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    The new release train
    • Next to the new timeline the new release model
    added some additional points
    
    
    • Deprecated code was removed from Java
    
    
    • @Deprecated has additional information
    

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69. This is a very very very long gag
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    The new release train
    A value of true indicates intent to
    remove the annotated program
    element in a future version.
    
    
    @Deprecated(forRemoval = true)
    

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70. This is a very very very long gag
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    The new release train
    • Several APIs were already removed between Java 8
    and Java 11:
    
    
    • CORBA
    
    
    • JAXB
    
    
    • Java Enterprise Annotations
    

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71. This is a very very very long gag
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    The new release train
    • Since Java will become more
    fl
    exible the users of Java
    need to become more
    fl
    exible, too
    
    
    • Based on the changes dependencies and application
    code need to be checked for a new version
    
    
    • Updates should be done more often
    

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72. Why do I need LTS?
    

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73. This is a very very very long gag
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    Security issues
    • The main reason for updates
    are security updates
    
    
    • Java contains security
    vulnerabilities
    
    
    • Several exploitable security
    issues are
    fi
    xed each year
    

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74. This is a very very very long gag
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    Security issues
    • About 100 exploitable security issues were
    fi
    xed in
    2018
    Jul 2018
    Oct 2017
    Jan 2018
    Apr 2018
    40
    20 60
    Okt 2018 Exploit not published
    Exploit is available
    

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75. This is a very very very long gag
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    Security issues
    • Let's Hack
    if(isJava6BeforeUpdate32()) {
    
    
    callExploitCve2013XXXX();
    
    
    } else if(isJava7BeforeUpdate10) {
    
    
    callExploitCve2013YYYY();
    
    
    }
    
    
    SecurityManager.setSecurityManager(null);
    
    
    copyMyBadByteArrayToExeInTempFolder();
    
    
    executeExeInTempFolder();
    

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76. This is a very very very long gag
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    Security issues
    • The main reason for updates are security updates
    
    
    • Java contains security vulnerabilities
    
    
    • Several exploitable security issues are
    fi
    xed each
    year
    More Information:
    https://bit.ly/2XfI0c4
    

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77. This is a very very very long gag
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    Commercial support
    • Several companies offer commercial support for
    Java
    
    
    • Normally this contains LTS versions of speci
    fi
    c Java
    versions
    
    
    • All companies share [more or less] the same
    work
    fl
    ow
    

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78. This is a very very very long gag
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    OpenJDK Work
    fl
    ow
    • Let's have a look how such issues are
    fi
    xed in Java
    
    
    • Since the OpenJDK is the open source repository of
    Java the issues will normally be
    fi
    xed here
    

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79. This is a very very very long gag
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    OpenJDK Work
    fl
    ow
    OpenJDK
    New feature
    Security
    fi
    x
    

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80. This is a very very very long gag
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    OpenJDK Work
    fl
    ow
    8
    9
    OpenJDK
    New feature
    Security
    fi
    x
    

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81. This is a very very very long gag
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    OpenJDK Work
    fl
    ow
    8
    9
    OpenJDK
    New feature
    Security
    fi
    x
    Public (free)
    lifetime of Java 8
    

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82. This is a very very very long gag
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    @hendrikEbbers
    OpenJDK Work
    fl
    ow
    8
    9
    Vendor B
    Vendor A
    OpenJDK
    New feature
    Security
    fi
    x
    

    View Slide

83. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    OpenJDK Work
    fl
    ow
    8
    9
    Vendor B
    Vendor A
    OpenJDK
    Commercial
    LTS support
    for Java 8
    New feature
    Security
    fi
    x
    

    View Slide

84. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    OpenJDK Work
    fl
    ow
    8
    9
    Vendor B
    Vendor A
    OpenJDK
    New feature
    Security
    fi
    x
    Commercial
    LTS support
    for Java 8
    

    View Slide

85. View Slide

86. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    

    

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87. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Adoptium is top level project of Eclipse Foundation
    

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88. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Adoptium WG is based on leaders of the ecosystem
    

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89. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    • Eclipse Adoptium provides an OpenJDK distribution
    
    
    • That distribution is called Temurin
    

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90. This is a very very very long gag
    @wol
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    ook
    @hendrikEbbers
    Temurin by Adoptium
    • Eclipse Adoptium is the successor of AdoptOpenJDK
    

    

    

    https://adoptium.net
    

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91. This is a very very very long gag
    @wol
    fl
    ook
    Temurin by Adoptium
    OpenJDK Sources
    Temurin Installer
    Binaries / Distribution
    ci.adoptopenjdk.net
    
    
    (ci.adoptium.net in near future)
    adoptium.net
    github.com/adoptium/installer
    github.com/adoptium/jdk
    
    
    github.com/adoptium/jdk8u
    Build / CI Infrastructure
    github.com/adoptium/temurin8-binaries/releases
    
    
    github.com/adoptium/temurin11-binaries/releases
    
    
    github.com/adoptium/temurin16-binaries/releases
    
    
    github.com/adoptium/temurin17-binaries/releases
    Platform Builds AQAvit
    github.com/adoptium/temurin-build
    github.com/adoptium/aqa-tests
    *
    *
    Redirect to
    

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92. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Why not 'Eclipse AdoptOpenJDK' ?
    • The answer is quite simple:
    

    

    

    

    

    • The Eclipse Foundation trademarks all names and
    'AdoptOpenJDK' is just not trademark able
    OpenJDK Java
    ™ ™
    

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93. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! Adoptium is much more than 'just the binaries':
    AQAVIT is the quality and runtime branding
    evaluation project for Java SE runtimes and
    associated technology.
    Any Java runtime
    Open source AQAVIT test &
    benchmark suite
    Enterprise ready runtime
    https://bit.ly/3nnLVi7
    More Info:
    

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94. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! Adoptium is much more than 'just the binaries':
    We want to create a good
    landing page for OpenJDK
    and Java Newcomer
    

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95. This is a very very very long gag
    @wol
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    ook
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! We want to be convenient:
    

    

    Like ___________ provides ___________ the Adoptium
    project provides Temurin
    Azul Systems Zulu
    Amazon Coretto
    Bellsoft Liberica
    Oracle Oracle JDK
    

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96. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Just call the distro 'Adoptium' ...
    • NO! Adoptium is much more than 'just the binaries':
    Community
    

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97. This is a very very very long gag
    @wol
    fl
    ook
    @hendrikEbbers
    Why 'Temurin' ?
    TEMURIN
    • The answer is quite simple:
    

    

    

    

    

    

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98. This is a very very very long gag
    @wol
    fl
    ook
    • The answer is quite simple:
    

    

    

    

    

    @hendrikEbbers
    Why 'Temurin' ?
    N
    N
    N
    N
    O
    H3
    C
    CH3
    CH3
    O
    N
    N
    N
    N
    O
    H3
    C
    CH3
    CH3
    O
    CH3
    O
    Caffeine Temurin
    

    View Slide

99. Other Distributions
    

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100. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Other distributions
     • Several companies provide OpenJDK based
     distributions based on different reasons:
     
     
     • Some wants to sell LTS support
     
     
     • Some wants to provide it bundled with products
     
     
     • Some wants to use it in the company cloud
     
     
     • ...
     

     View Slide

101. This is a very very very long gag
     @wol
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     @hendrikEbbers
     OpenJDK Distributionen
     Azul Zulu
     Oracle JDK
     Amazon Coretto
     AdoptOpenJDK
     Bellsoft Liberica
     Red Hat Upstream
     Adoptium Temurin
     

     View Slide

102. This is a very very very long gag
     @wol
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     @hendrikEbbers
     Other distributions
     • It is really hard to choose a distribution...
     
     
     • Adoptium tries to help the user by providing a
     marketplace
     
     
     • The Adoptium marketplace will only contain
     distributions that are TCK and AQAvit approved
     

     View Slide

103. This is a very very very long gag
     @wol
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     @hendrikEbbers
     Adoptium Marketplace
     Mockup
     

     View Slide

104. New features
     

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105. This is a very very very long gag
     @wol
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     @hendrikEbbers
     JDK Features
     • All features of new Java releases are de
     fi
     ned by JDK
     Enhancement Proposals (JEP) of the OpenJDK
     
     
     • De
     fi
     nitions of JEPs and the feature lists of a Java
     release can be found at the OpenJDK
     
     
     • JEP URL: https://openjdk.java.net/jeps/395
     
     
     • Release URL: https://openjdk.java.net/projects/jdk/16/
     

     View Slide

106. View Slide

107. View Slide

108. This is a very very very long gag
     @wol
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     @hendrikEbbers
     JEP De
     fi
     nitions
     • The JEP de
     fi
     nition and work
     fl
     ow is de
     fi
     ned by JEPs:
     
     
     • JEP 0 contains an up-to-date index of all JEPs
     
     
     • JEP 1 & JEP 2 de
     fi
     nes the content and work
     fl
     ows of
     JEPs
     
     
     • JEP 3 de
     fi
     nes the release process of the JDK
     

     View Slide

109. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     JEP Work
     fl
     ow
     

     View Slide

110. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     JEP De
     fi
     nitions
     • A Java release can contain JEPs as previews or in
     incubator mode:
     
     
     • JEP 11 de
     fi
     nes incubator mode
     
     
     • JEP 12 de
     fi
     nes preview mode
     

     View Slide

111. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     Preview Features
     $ javac HelloWorld.java
     

     

     
     $ javac --release 14 --enable-preview HelloWorld.java
     
     
     $ java --enable-preview HelloWorld
     Enable all preview features
     of JDK 14
     Run with all preview features
     of JDK 14
     

     View Slide

112. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     JEP Count by Release
     Java 8 Java 9 Java 11 Java 12 Java13 Java 14 Java 15
     0
     10
     20
     30
     40
     50
     60
     70
     80
     90
     100
     50+
     90+
     17
     8 5
     16 14
     3+ years per release 6 month per release
     Java 16
     17
     Java 17
     14
     

     View Slide

113. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     JDK 12 Features
     • 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
     
     
     • 230: Microbenchmark Suite
     
     
     • 325: Switch Expressions (Preview)
     
     
     • 334: JVM Constants API
     
     
     • 340: One AArch64 Port, Not Two
     
     
     • 341: Default CDS Archives
     
     
     • 344: Abortable Mixed Collections for G1
     
     
     • 346: Promptly Return Unused Committed Memory from G1
     

     View Slide

114. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     JDK 13 Features
     • 350: Dynamic CDS Archives
     
     
     • 351: ZGC: Uncommit Unused Memory
     
     
     • 353: Reimplement the Legacy Socket API
     
     
     • 354: Switch Expressions (Preview)
     
     
     • 355: Text Blocks (Preview)
     

     View Slide

115. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     JDK 14 Features
     • 305: Pattern Matching for instanceof
     (Preview)
     
     
     • 343: Packaging Tool (Incubator)
     
     
     • 345: NUMA-Aware Memory Allocation for G1
     
     
     • 349: JFR Event Streaming
     
     
     • 352: Non-Volatile Mapped Byte Buffers
     
     
     • 358: Helpful NullPointerExceptions
     
     
     • 359: Records (Preview)
     
     
     • 361: Switch Expressions (Standard)
     
     
     • 362: Deprecate the Solaris and SPARC Ports
     
     
     • 363: Remove the Concurrent Mark Sweep
     (CMS) Garbage Collector
     
     
     • 364: ZGC on macOS
     
     
     • 365: ZGC on Windows
     
     
     • 366: Deprecate the ParallelScavenge +
     SerialOld GC Combination
     
     
     • 367: Remove the Pack200 Tools and API
     
     
     • 368: Text Blocks (Second Preview)
     
     
     • 370: Foreign-Memory Access API (Incubator)
     

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116. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Helpful NullPointerExceptions
     Exception in thread "main" java.lang.NullPointerException:
     
     
     Cannot assign field "i" because "a" is null
     
     
     at Prog.main(Prog.java:5)
     Exception in thread "main" java.lang.NullPointerException:
     
     
     Cannot read field "c" because "a.b" is null
     
     
     at Prog.main(Prog.java:5)
     
     
     •
     

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117. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     JDK 15 Features
     • 339: Edwards-Curve Digital Signature
     Algorithm (EdDSA)
     
     
     • 360: Sealed Classes (Preview)
     
     
     • 371: Hidden Classes
     
     
     • 372: Remove the Nashorn JavaScript
     Engine
     
     
     • 373: Reimplement the Legacy
     DatagramSocket API
     
     
     • 374: Disable and Deprecate Biased Locking
     
     
     • 375: Pattern Matching for instanceof
     (Second Preview)
     
     
     • 377: ZGC: A Scalable Low-Latency Garbage
     Collector
     
     
     • 378: Text Blocks
     
     
     • 379: Shenandoah: A Low-Pause-Time
     Garbage Collector
     
     
     • 381: Remove the Solaris and SPARC Ports
     
     
     • 383: Foreign-Memory Access API (Second
     Incubator)
     
     
     • 384: Records (Second Preview)
     
     
     • 385: Deprecate RMI Activation for Removal
     

     View Slide

118. This is a very very very long gag
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     ook
     @hendrikEbbers
     Text Blocks
     void writeHTML() {
     
     
     String html = """
     
     
     
     
     
     
     
     
     Hello World.
     
     
     
     
     
     
     
     
     """;
     
     
     writeOutput(html);
     
     
     }
     

     View Slide

119. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     JDK 16 Features
     • 394: Pattern Matching for instanceof
     
     
     • 395: Records
     
     
     • 376: ZGC: Concurrent Thread-Stack
     Processing
     
     
     • 387: Elastic Metaspace
     
     
     • 380: Unix-Domain Socket Channels
     
     
     • 392: Packaging Tool
     
     
     • 396: Strongly Encapsulate JDK Internals
     by Default
     
     
     • 390: Warnings for Value-Based Classes
     
     
     • 397: Sealed Classes (Second Preview)
     
     
     • 338: Vector API (Incubator)
     
     
     • 389: Foreign Linker API (Incubator)
     
     
     • 393: Foreign-Memory Access API (Third
     Incubator)
     
     
     • 347: Enable C++14 Language Features
     
     
     • 357: Migrate from Mercurial to Git
     
     
     • 369: Migrate to GitHub
     
     
     • 386: Alpine Linux Port
     
     
     • 388: Windows/AArch64 Port
     

     View Slide

120. This is a very very very long gag
     @wol
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     @hendrikEbbers
     Vector API
     a = b + c * z[i+0] a b c z[i+0]
     
     
     d = e + f * z[i+1] d e f z[i+1]
     
     
     r = s + t * z[i+2] r s t z[i+2]
     
     
     u = v + w * z[i+3] u v w z[i+3]
     Old approach With Vector API
     = + SIMD * SIMD
     four multiplications
     
     
     four additions
     
     
     four assignments
     One SIMD multiplications
     
     
     One SIMD additions
     
     
     One assignments
     *
     *
     SIMD = Single Instruction Multiple Data
     *
     

     View Slide

121. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     JDK 17 Features
     • 409: Sealed Classes
     
     
     • 406: Pattern Matching for Switch
     (Preview)
     
     
     • 356: Enhanced Pseudo-Random Number
     Generators
     
     
     • 382: New macOS Rendering Pipeline
     
     
     • 415: Context-Speci
     fi
     c Deserialization
     Filters
     
     
     • 412: Foreign Function & Memory API
     (Incubator)
     
     
     • 414: Vector API (Second Incubator)
     
     
     • 403: Strongly Encapsulate JDK Internals
     
     
     • 306: Restore Always-Strict Floating-Point
     Semantics
     
     
     • 411: Deprecate the Security Manager for
     Removal
     
     
     • 398: Deprecate the Applet API for
     Removal
     
     
     • 407: Remove RMI Activation
     
     
     • 410: Remove the Experimental AOT and
     JIT Compiler
     
     
     • 391: macOS/AArch64 Port
     

     View Slide

122. This is a very very very long gag
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     ook
     @hendrikEbbers
     New macOS Rendering Pipeline
     • Implement a Java 2D internal rendering pipeline for
     macOS using the Apple Metal API
     
     
     • Alternative to the existing pipeline, which uses the
     deprecated Apple OpenGL API
     Apple deprecated the OpenGL
     rendering library in September 2018
     

     View Slide

123. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     macOS/AArch64 Port
     • Apple has announced a long-term plan to transition
     their line of Macintosh computers from x64 to AArch64
     (ARM)
     
     
     • Native support added to OpenJDK
     
     
     Apple M1 chip for example
     No Rosetta 2 usage anymore
     

     View Slide

124. Project Skara
     

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125. This is a very very very long gag
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     OpenJDK at Git
     • JavaFX was the
     fi
     rst project of the OpenJDK that has
     been migrated to git & GitHub
     
     
     • With project Skara the OpenJDK is moved to git &
     GitHub
     https://github.com/openjdk/jfx
     

     View Slide

126. This is a very very very long gag
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     OpenJDK at Git
     • Since OpenJDK projects are now hosted at GitHub
     contribution is super easy
     
     
     • Every GitHub user can create a PR (+ some paperwork
     to have you checked as a valid OpenJDK commiter)
     

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127. This is a very very very long gag
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     All OS Builds with GitHub Actions
     • OpenJDK projects already use GitHub
     Actions for CI tasks
     
     
     • Automatically build and test JavaFX
     on all 3 big operation systems for
     each pull request
     https://github.com/openjdk/jfx/pull/619/checks
     

     View Slide

128. This is a very very very long gag
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     @hendrikEbbers
     Issue tracker is still untouched
     • The Java issue tracker has not changed with project
     Skara
     
     
     • OpenJDK Bug Tracker is still Jira based on not directly
     writeable by endusers
     

     View Slide

129. This is a very very very long gag
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     @hendrikEbbers
     Issue tracker is still untouched
     • Oracle provides hard to handle solution
     
     
     • If you want to follow me
     

     (Hendrik) down the rabbit hole:
     

     

     https://bit.ly/3nnJdsX
     

     View Slide

130. Migrate now
     

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131. This is a very very very long gag
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     @hendrikEbbers
     Migrating to JDK 17
     • Oracle provides a migration guide:
     
     
     • Signi
     fi
     cant Changes in the JDK
     
     
     • Preparing For Migration
     
     
     • Migrating From JDK 8 to Later JDK Releases
     https://docs.oracle.com/en/java/javase/17/migrate/index.html
     https://bit.ly/3k224YD
     

     View Slide

132. This is a very very very long gag
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     @hendrikEbbers
     Migrating to JDK 17
     • Download JDK 17
     
     
     • Run your program before recompiling
     
     
     • Update 3rd-party libraries
     
     
     • Compile your application if needed
     
     
     • Run jdeps on your code
     

     View Slide

133. This is a very very very long gag
     @wol
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     ook
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     Check removed APIs
     • The Java Version Almanac contains all information
     that you need
     
     
     • Open source service by Mark Hoffmann
     
     
     • Support any 2 releases
     
     
     https://javaalmanac.io/jdk/17/apidiff/11/
     https://bit.ly/3z2Bqmv
     

     View Slide

134. @wol
     fl
     ook
     @hendrikEbbers
     Check all removed
     modifications
     

     View Slide

135. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Missing tools
     • You might miss some tools
     
     
     • WebStart and Applet support is gone
     
     
     • Check open source solution at openwebstart.com
     

     View Slide

136. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     Deprecated for Removal in 17
     • Applet API (JEP 398)
     
     
     • No Web browser supports Applets anymore
     
     
     • Security Manager (JEP 411)
     
     
     • Was used extensively for running applets in a sandbox
     
     
     • Not been the primary means of securing client-side Java code
     for many years
     
     
     • Rarely been used to secure server-side Java code
     

     View Slide

137. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     Removed in JDK 17
     • RMI Activation (JEP 407)
     
     
     • Deprecated for removal since JDK 15
     
     
     • Experimental AOT and JIT Compiler (JEP 410)
     
     
     • AOT was an experimental feature shipped introduced with JDK 9
     
     
     • GraalVM JIT Compiler was an experimental feature introduced
     with JDK 10
     
     
     • Was not included with JDK 16
     

     View Slide

138. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     JavaFX Migration
     • JavaFX was part of Java 8 binaries by several vendors
     like Oracle or Azul
     
     
     • For Java 11 the best practice is to handle JavaFX like
     any other dependency
     
     
     • Good tutorials for Maven & Gradle can be found at
     https://openjfx.io/openjfx-docs/
     https://bit.ly/2XdV41D
     

     View Slide

139. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Check for usage of private API
     • We can't say that often enough
     
     
     • Check your code for any usage
     
     
     • Many online resources for individual issues
     ... or consultancy
     

     View Slide

140. This is a very very very long gag
     @wol
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     ook
     @hendrikEbbers
     Migrating to a different Vendor
     • Maybe you want to migrate to a different OpenJDK
     based distribution
     
     
     • Since all are based on OpenJDK and mostly all are TCK
     checked a switch should be super easy...
     you do Have a support subscription
     for Java versions in production ?
     As you can imagine there are exceptions...
     

     View Slide

141. This is a very very very long gag
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     @hendrikEbbers
     Migrating to a different Vendor
     • There are still some minor differences distributions
     
     
     • As an example Oracle JDK uses a different font in
     Swing than the OpenJDK does
     
     
     • Adoptium provides an migration guide:
     

     https://adoptium.net/migration.html
     https://bit.ly/3tBroI1
     

     View Slide

142. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Modular Development with JDK 17
     

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143. This is a very very very long gag
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     @hendrikEbbers
     Additional resources
     • You can
     fi
     nd many good resources online
     
     
     • ... sadly not all are 100% correct
     
     
     • Good starting points:
     https://docs.microsoft.com/en-us/java/openjdk/transition-from-java-8-to-java-11
     https://bit.ly/3tBroI1
     https://nipafx.dev/java-11-migration-guide/
     https://bit.ly/3C3aTY9
     

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144. Next Steps
     

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145. This is a very very very long gag
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     @hendrikEbbers
     GraalVM
     GraalVM Community is available for free for any
     use. It is built from the GraalVM sources available
     on GitHub. We provide pre-built binaries for Linux/
     X86, Linux/ARM, macOS, and Windows platforms on
     x86 64-bit systems. Support for the Windows and
     Linux/ARM platforms, and the Python, Ruby and R
     languages is experimental.
     
     
     Note
     
     
     GraalVM Community Edition contains significant
     technology from other projects including OpenJDK
     and Node.js which are not maintained by the
     GraalVM community. GraalVM Enterprise Edition is
     recommended for production applications.
     GraalVM Enterprise provides additional performance,
     security, and scalability relevant for running
     applications in production. You can get a version of
     GraalVM Enterprise that is free for evaluation and
     developing new applications via the Oracle
     Technology Network (OTN), or a commercially
     licensed version for production use via the Oracle
     Store.
     
     
     We provide binaries for Linux, macOS, and Windows
     platforms on x86 64-bit systems. Support for the
     Windows and Linux/ARM platforms, and the Python,
     Ruby and R languages is experimental.
     Enterprise Edition
     Community Edition
     

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146. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     GraalVM
     • Unlike OpenJDK the GraalVM is a full Oracle product
     
     
     • BUT: GraalVM is open source
     
     
     • BUT: GraalVM community edition is available
     
     
     • BUT: Advisory Board contains multiple companies
     https://www.graalvm.org/community/advisory-board/
     

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147. This is a very very very long gag
     @wol
     fl
     ook
     @hendrikEbbers
     Key Java Platform Investments
     • Security & Vulnerability
     
     
     • Approachability & Continued language enhancements
     
     
     • Cloud Containers & Observability
     
     
     • Data optimization & Density
     
     
     • Predictability at Scale
     
     
     • Performance & Ef
     fi
     ciency
     
     
     • Hardware Acceleration (GPU, NVM, etc.)
     

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148. Stay safe & healthy
     

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149. @hendrikEbbers
     dev.karakun.com
     

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