Java 17 Release

Transcript

1. Java 17 Das neue LTS Release is da!
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.
3. This is a very very very long gag @wol fl ook @hendrikEbbers Wolfgang Weigend • Wolfgang Weigend • Master Principal Solution Engineer • Global Java Team • Java Technology & GraalVM 
 Architecture
4. This is a very very very long gag @wol fl ook @hendrikEbbers Hendrik Ebbers • Karakun Co-Founder • Founder of JUG Dortmund • JSR EG member • JavaOne Rockstar, Java Champion • AdoptOpenJDK / Adoptium TSC member
5. This is a very very very long gag @wol fl ook @hendrikEbbers Hendrik Ebbers • I (and collect) boardgames • I STARWARS • I Hardrock • I Dogs
6. PARTY Java 17 Cyberlan d
7. Wer von euch hat wohl das älteste JAVA Programm? TagebuchApplet.java AWTodo_v45.java 
 MyFirstStrutsAction.java cyberland@ijug.eu https://cyberland.ijug.eu
8. Heute Abend gehts AB!!1!! 19:00 nur echt auf YouTube ... wenn YouTube klappt * * https://cyberland.ijug.eu
9. https://www.menti.com/gn91fpftpx Mach mit und gewinne exklusiven SWAG Nicht Hendrik! Das Shirt meinen wir! The voting code 8616 0213
10. This is a very very very long gag @wol fl ook @hendrikEbbers Content • History recall • OpenJDK • Java release model • Java Features • Migration • Future of OpenJDK
14. This is a very very very long gag @wol fl ook @hendrikEbbers 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
15. This is a very very very long gag @wol fl ook @hendrikEbbers 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
16. This is a very very very long gag @wol fl ook @hendrikEbbers 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
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”
18. JavaOne 2009 “Our whole next generation of business applications is built entirely on Java”
19. JavaOne 2009 “Java was a very attractive platform for us because it was open, and it allowed us to extend the platform”
20. 27th of January 2010 “Java is going to grow”
23. This is a very very very long gag @wol fl ook @hendrikEbbers Java getting old? • Big plans at SUN • Realisation at Oracle splitter in 2 
 releases • JDK 7 (Security) • JDK 8 (Lambdas & Streams)
24. This is a very very very long gag @wol fl ook @hendrikEbbers 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
25. This is a very very very long gag @wol fl ook @hendrikEbbers 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
26. This is a very very very long gag @wol fl ook @hendrikEbbers 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
27. Java in a Nutshell
28. This is a very very very long gag @wol fl ook @hendrikEbbers Java in a nutshell Standard APIs Tools JVM
29. This is a very very very long gag @wol fl ook @hendrikEbbers 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)
30. This is a very very very long gag @wol fl ook @hendrikEbbers 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)
31. This is a very very very long gag @wol fl ook @hendrikEbbers 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
32. This is a very very very long gag @wol fl ook @hendrikEbbers 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
33. This is a very very very long gag @wol fl ook @hendrikEbbers 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
34. This is a very very very long gag @wol fl ook @hendrikEbbers 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
35. This is a very very very long gag @wol fl ook @hendrikEbbers The tools • Each Java distribution contains a large set of tools • Some are part of OpenJDK • Some are vendor speci fi c
36. This is a very very very long gag @wol fl ook @hendrikEbbers 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
37. This is a very very very long gag @wol fl ook @hendrikEbbers 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
38. This is a very very very long gag @wol fl ook @hendrikEbbers Oracle JDK & OpenJDK OpenJDK 8 JVM, tools, etc. JVM, tools, etc. Exclusive Oracle stu f eg. Flight recorder WebStart Mission Control Oracle JDK 8
39. This is a very very very long gag @wol fl ook @hendrikEbbers Java getting old? OpenJDK 12 Oracle JDK 12 JVM, tools, etc. equals JVM, tools, etc.
40. This is a very very very long gag @wol fl ook @hendrikEbbers 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
41. OpenJDK
42. This is a very very very long gag @wol fl ook @hendrikEbbers 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...
44. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Groups & Projects Core Libraries Group 2D Graphics Group HotSpot Group OpenJFX Project JDK Project Panama Project
45. This is a very very very long gag @wol fl ook @hendrikEbbers 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
46. This is a very very very long gag @wol fl ook @hendrikEbbers 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
47. This is a very very very long gag @wol fl ook @hendrikEbbers Companies that contributed in 11
48. This is a very very very long gag @wol fl ook @hendrikEbbers Companies that contributed in 16
49. This is a very very very long gag @wol fl ook @hendrikEbbers 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
50. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Distributionen Azul Zulu Oracle JDK Amazon Coretto AdoptOpenJDK Bellsoft Liberica Red Hat Upstream Adoptium Temurin
51. This is a very very very long gag @wol fl ook @hendrikEbbers 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
52. This is a very very very long gag @wol fl ook @hendrikEbbers 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
53. This is a very very very long gag @wol fl ook @hendrikEbbers 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
54. This is a very very very long gag @wol fl ook @hendrikEbbers 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
55. Java Roadmap
56. This is a very very very long gag @wol fl ook @hendrikEbbers 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
57. This is a very very very long gag @wol fl ook @hendrikEbbers 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
58. This is a very very very long gag @wol fl ook @hendrikEbbers Oracle Java roadmap 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Java 6 Java 7 Java 8 Free
59. This is a very very very long gag @wol fl ook @hendrikEbbers 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
60. This is a very very very long gag @wol fl ook @hendrikEbbers 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
61. This is a very very very long gag @wol fl ook @hendrikEbbers 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
62. This is a very very very long gag @wol fl ook @hendrikEbbers 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
63. This is a very very very long gag @wol fl ook @hendrikEbbers 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
64. This is a very very very long gag @wol fl ook @hendrikEbbers 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
65. This is a very very very long gag @wol fl ook @hendrikEbbers 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
66. This is a very very very long gag @wol fl ook @hendrikEbbers Oracle OpenJDK distribution Java 9 Java 10 Java 11 Java 12 Java 13 Java 14 Java 15 2018 2019 2020 Java 8 Free
67. This is a very very very long gag @wol fl ook @hendrikEbbers 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
68. This is a very very very long gag @wol fl ook @hendrikEbbers 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
69. This is a very very very long gag @wol fl ook @hendrikEbbers The new release train A value of true indicates intent to remove the annotated program element in a future version. @Deprecated(forRemoval = true)
70. This is a very very very long gag @wol fl ook @hendrikEbbers The new release train • Several APIs were already removed between Java 8 and Java 11: • CORBA • JAXB • Java Enterprise Annotations
71. This is a very very very long gag @wol fl ook @hendrikEbbers 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
72. Why do I need LTS?
73. This is a very very very long gag @wol fl ook @hendrikEbbers Security issues • The main reason for updates are security updates • Java contains security vulnerabilities • Several exploitable security issues are fi xed each year
74. This is a very very very long gag @wol fl ook @hendrikEbbers 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
75. This is a very very very long gag @wol fl ook @hendrikEbbers Security issues • Let's Hack if(isJava6BeforeUpdate32()) { callExploitCve2013XXXX(); } else if(isJava7BeforeUpdate10) { callExploitCve2013YYYY(); } SecurityManager.setSecurityManager(null); copyMyBadByteArrayToExeInTempFolder(); executeExeInTempFolder();
76. This is a very very very long gag @wol fl ook @hendrikEbbers 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
77. This is a very very very long gag @wol fl ook @hendrikEbbers 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
78. This is a very very very long gag @wol fl ook @hendrikEbbers 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
79. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Work fl ow OpenJDK New feature Security fi x
80. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Work fl ow 8 9 OpenJDK New feature Security fi x
81. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Work fl ow 8 9 OpenJDK New feature Security fi x Public (free) lifetime of Java 8
82. 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
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
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
86. This is a very very very long gag @wol fl ook @hendrikEbbers Temurin by Adoptium • Eclipse Adoptium is the successor of AdoptOpenJDK 
 
 
 

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
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
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
90. This is a very very very long gag @wol fl ook @hendrikEbbers Temurin by Adoptium • Eclipse Adoptium is the successor of AdoptOpenJDK 
 
 
 https://adoptium.net
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
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 ™ ™
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:
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
95. This is a very very very long gag @wol fl 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
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
97. This is a very very very long gag @wol fl ook @hendrikEbbers Why 'Temurin' ? TEMURIN • The answer is quite simple: 
 
 
 
 

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
99. Other Distributions
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 • ...
101. This is a very very very long gag @wol fl ook @hendrikEbbers OpenJDK Distributionen Azul Zulu Oracle JDK Amazon Coretto AdoptOpenJDK Bellsoft Liberica Red Hat Upstream Adoptium Temurin
102. This is a very very very long gag @wol fl ook @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
103. This is a very very very long gag @wol fl ook @hendrikEbbers Adoptium Marketplace Mockup
104. New features
105. This is a very very very long gag @wol fl ook @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/
108. This is a very very very long gag @wol fl ook @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
109. This is a very very very long gag @wol fl ook @hendrikEbbers JEP Work fl ow
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
111. This is a very very very long gag @wol fl 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
112. This is a very very very long gag @wol fl 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
113. This is a very very very long gag @wol fl 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
114. This is a very very very long gag @wol fl 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)
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)
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) •
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
118. This is a very very very long gag @wol fl ook @hendrikEbbers Text Blocks void writeHTML() { String html = """ <html> <body> <p>Hello World.</p> </body> </html> """; writeOutput(html); }
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
120. This is a very very very long gag @wol fl ook @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 *
121. This is a very very very long gag @wol fl 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
122. This is a very very very long gag @wol fl 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
123. This is a very very very long gag @wol fl 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
124. Project Skara
125. This is a very very very long gag @wol fl ook @hendrikEbbers 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
126. This is a very very very long gag @wol fl ook @hendrikEbbers 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)
127. This is a very very very long gag @wol fl ook @hendrikEbbers 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
128. This is a very very very long gag @wol fl ook @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
129. This is a very very very long gag @wol fl ook @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
130. Migrate now
131. This is a very very very long gag @wol fl ook @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
132. This is a very very very long gag @wol fl ook @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
133. This is a very very very long gag @wol fl ook @hendrikEbbers 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
134. @wol fl ook @hendrikEbbers Check all removed modifications
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
136. This is a very very very long gag @wol fl 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
137. This is a very very very long gag @wol fl 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
138. This is a very very very long gag @wol fl 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
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
140. This is a very very very long gag @wol fl 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...
141. This is a very very very long gag @wol fl ook @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
142. This is a very very very long gag @wol fl ook @hendrikEbbers Modular Development with JDK 17
143. This is a very very very long gag @wol fl ook @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
144. Next Steps
145. This is a very very very long gag @wol fl ook @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
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/
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.)
148. Stay safe & healthy
149. @hendrikEbbers dev.karakun.com