Geektastic Connect: Neues von Java und dem JDK

Durch die Verkürzung des Release-Zyklus von Java und dem JDK auf nur noch sechs Monate erscheinen nun zwei Major-Releases pro Jahr. Hierdurch ist es schwer geworden den Überblick über all die neuen Features, Diskussionen und Ideen zu behalten. Im Fokus dieses Vortags stehen deswegen die Entwicklungen und Neuerungen des letzten Jahres, also Java 11 und 12. Daneben werden auch die Planungen für Java 13 und weitere relevante Themen und Diskussionen rund um das JDK vorgestellt.

Transcript

1. 2019-07-17
 Düsseldorf / Geektastic Connect Neues von Java
 und dem JDK Michael Vitz https://pixabay.com/en/coffee-beans-blue-red-caffeine-1599262/ @michaelvitz
2. Michael Vitz
 Senior Consultant at INNOQ • Build, run, and maintain JVM applications • JavaSPEKTRUM column owner • ❤ Clojure
3. www.innoq.com OFFICES Monheim Berlin Hamburg Offenbach Munich Zurich FACTS ~125 employees Privately owned Vendor-independent SERVICES Strategy & technology consulting Digital business models Software architecture & development Digital platforms & infrastructures Knowledge transfer, coaching & trainings CLIENTS Finance Telecommunications Logistics E-commerce Fortune 500 SMBs Startups
4. Vote https://pixabay.com/en/audience-crowd-event-cheer-945449/
7. https://www.infoq.com/articles/java-jvm-trends-2019/
8. Is Java Still Free? https://pixabay.com/photos/dove-freedom-bird-nature-animal-2680487/
9. https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html
10. http://www.oracle.com/technetwork/java/eol-135779.html
11. http://openjdk.java.net/
12. http://jdk.java.net/11/
13. https://developers.redhat.com/blog/2018/09/24/the-future-of-java-and-openjdk-updates-without-oracle-support/
14. https://shipilev.net/jdk-updates/map/
15. https://adoptopenjdk.net
16. https://aws.amazon.com/corretto/
17. https://www.azul.com/products/zulu-enterprise/
18. https://bell-sw.com/pages/java-11.0.2/
19. https://www.ibm.com/de-en/marketplace/support-for-runtimes
20. https://www.jclarity.com/index.php
21. https://access.redhat.com/articles/1299013
22. https://sap.github.io/SapMachine/
23. Java is Still Free (see https:/ /medium.com/@javachampions/java-is-still-free-2-0-0-6b9aa8d6d244) https://pixabay.com/photos/dove-freedom-bird-nature-animal-2680487/
24. https://mail.openjdk.java.net/pipermail/jdk8u-dev/2019-May/009330.html
25. JDK 10 https://pixabay.com/en/number-ad-yellow-color-asphalt-437928/
26. http://openjdk.java.net/projects/jdk/10/
27. JEP 286: Local-Variable Type Inference var Cheat Sheet: https://snyk.io/blog/local-type-inference-java-cheat-sheet/ Style Guidelines: http://openjdk.java.net/projects/amber/LVTIstyle.html http://openjdk.java.net/jeps/286
28. JEP 322:Time-Based Release Versioning [1-9][0-9]*((\.0)*\.[1-9][0-9]*)* http://openjdk.java.net/jeps/322
29. http://openjdk.java.net/projects/jdk/10/
30. More small enhancements • @summary • • List#copyOf, Map#copyOf, Set#copyOf • Collectors#toUnmodifiableList/Set/Map • Optional::orElseThrow https://bugs.openjdk.java.net/browse/JDK-8173425 https://bugs.openjdk.java.net/browse/JDK-8146115 https://bugs.openjdk.java.net/browse/JDK-8177290 https://bugs.openjdk.java.net/browse/JDK-8184690 https://bugs.openjdk.java.net/browse/JDK-8140281
31. JDK 11 https://pixabay.com/en/pool-balls-billiard-eleven-eight-1003955/
32. http://openjdk.java.net/projects/jdk/11/
33. http://openjdk.java.net/jeps/320 <jaxb with="jdk11"> <is provided="false" /> </jaxb> JEP 320: Remove the Java EE and CORBA Modules
34. JEP 321: HTTP Client http://openjdk.java.net/jeps/321 HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://openjdk.java.net/")) .build(); client.sendAsync(request, ofString()) .thenApply(HttpResponse::body) .thenAccept(System.out::println) .join(); http://openjdk.java.net/groups/net/httpclient/intro.html
35. (var x) -> process(x) JEP 323: Local-Variable Syntax for Lambda Parameters http://openjdk.java.net/jeps/323 (@Nonnull
36. JEP 330: Launch Single-File Source-Code Programs http://openjdk.java.net/jeps/330 javac Foo.java \ && java Foo \ && rm Foo.class
37. http://openjdk.java.net/projects/jdk/11/
38. java.io • java.io.FileReader(java.lang.String, java.nio.charset.Charset) • java.io.FileWriter(java.lang.String, java.nio.charset.Charset) • java.io.InputStream#nullInputStream • java.io.OutputStream#nullOutputStream • java.io.Reader#nullReader • java.io.Writer#nullWriter
39. java.lang.String • String::repeat(int) • String::lines • String::strip, String::stripLeading, String::stripTrailing • String::isBlank https://bugs.openjdk.java.net/browse/JDK-8197594 https://bugs.openjdk.java.net/browse/JDK-8200380 https://bugs.openjdk.java.net/browse/JDK-8200377 https://bugs.openjdk.java.net/browse/JDK-8200436
40. java.util.Optional/Predicate • Optional::isEmpty • Predicate#not https://bugs.openjdk.java.net/browse/JDK-8184693 https://bugs.openjdk.java.net/browse/JDK-8050818
41. java.nio.file.Files/Path • Files#isSameContent • Files#readString, Files#writeString • Path#of(URI), Path#of(String, String…) https://bugs.openjdk.java.net/browse/JDK-8202302 https://bugs.openjdk.java.net/browse/JDK-8202055 https://bugs.openjdk.java.net/browse/JDK-8199485
42. java.util.regex.Pattern • Pattern::asMatchPredicate https://bugs.openjdk.java.net/browse/JDK-8201308
43. java.lang.Thread • Thread::stop(Throwable), Thread::destroy https://bugs.openjdk.java.net/browse/JDK-8204243
44. JDK 12 https://pixabay.com/en/gate-wrought-iron-iron-number-3267016/
45. http://openjdk.java.net/projects/jdk/12/
46. JEP 325: Switch Expressions (Preview) http://openjdk.java.net/jeps/325 int numLetters = switch (day) { case MONDAY, FRIDAY, SUNDAY -> { System.out.println("Whoop"); break 6; } case TUESDAY -> 7; case THURSDAY, SATURDAY -> 8; case WEDNESDAY -> 9; }; Preview-Features article: https://blog.codefx.org/java/enable-preview-features/
47. JEP 346: Promptly Return Unused Committed Memory from G1 http://openjdk.java.net/jeps/346
48. http://openjdk.java.net/projects/jdk/12/
49. java.lang.String • String::align • String::indent(int) • String::transform(Function) https://bugs.openjdk.java.net/browse/JDK-8215490 https://bugs.openjdk.java.net/browse/JDK-8200435 https://bugs.openjdk.java.net/browse/JDK-8203703
50. API Changes • {@systemProperty} • Files#mismatch(Path, Path) • Collectors#teeing(Collector, Collector, BiFunction) https://bugs.openjdk.java.net/browse/JDK-5076751 https://bugs.openjdk.java.net/browse/JDK-8202302 https://bugs.openjdk.java.net/browse/JDK-8209685
51. JDK 13 https://pixabay.com/photos/house-number-13-house-number-13-3143265/
52. https://openjdk.java.net/projects/jdk/13/
53. JEP 354: Switch Expressions (Preview) http://openjdk.java.net/jeps/354 int numLetters = switch (day) { case MONDAY, FRIDAY, SUNDAY -> { System.out.println("Whoop"); yield 6; } case TUESDAY -> 7; case THURSDAY, SATURDAY -> 8; case WEDNESDAY -> 9; };
54. JEP 355: Text Blocks (Preview) https://openjdk.java.net/jeps/355 String html = """ <html> <body> <p>Hello, world</p> </body> </html> """; Detailed article: https://blog.codefx.org/java/text-blocks/
55. https://openjdk.java.net/projects/jdk/13/
56. More small enhancements • Deprecate -Xverify:none option • String::formatted • String::stripIndent • String::translateEscapes • Provide VM.events diagnostic command https://bugs.openjdk.java.net/browse/JDK-8214719 https://bugs.openjdk.java.net/browse/JDK-8203444 https://bugs.openjdk.java.net/browse/JDK-8223775 https://bugs.openjdk.java.net/browse/JDK-8223780 https://bugs.openjdk.java.net/browse/JDK-8224601
57. JDK 14 https://pixabay.com/photos/number-fourteen-white-brown-2213576/
58. https://openjdk.java.net/projects/jdk/14/
59. JEP 352: Non-Volatile Mapped Byte Buffers https://openjdk.java.net/jeps/352
60. Future https://pixabay.com/en/binoculars-looking-man-discovery-1209011/
61. Project Amber https://pixabay.com/en/heart-amber-pendant-necklace-1202129/
62. http://openjdk.java.net/projects/amber/
63. JEP 305: Pattern Matching for instanceof (Preview) http://openjdk.java.net/jeps/305 if (obj instanceof String s) { // can use s here } else { // can't use s here } @Override public boolean equals(Object o) { return (o instanceof CaseInsensitiveString cis) && cis.s.equalsIgnoreCase(s); }
64. JEP 348: Compiler Intrinsics for Java SE APIs https://openjdk.java.net/jeps/348
65. JEP draft 8213076: Pattern matching for switch (Preview) https://openjdk.java.net/jeps/8213076 String formatted; switch (obj) { case Integer i: formatted = String.format("int %d", i); break; case Byte b: formatted = String.format("byte %d", b); break; case Long l: formatted = String.format("long %d", l); break; case Double d: formatted = String.format("double %f", l); break; case String s: formatted = String.format("String %s", s); break; default: formatted = obj.toString(); }
66. JEP draft 8209434: Concise Method Bodies http://openjdk.java.net/jeps/8209434 // -> is "single expression form" int length(String s) -> s.length(); // = is "method reference form" int length(String s) = String::length;
67. Project Loom https://pixabay.com/en/craftsman-loom-craftsmanship-hands-1839920/
68. https://wiki.openjdk.java.net/display/loom/Main
69. Project Valhalla https://pixabay.com/en/tunnel-passage-underpass-light-965720/
70. https://wiki.openjdk.java.net/display/valhalla/Main
71. JEP169: Value Objects https://openjdk.java.net/jeps/169
72. JEP218: Generics over Primitive Types http://openjdk.java.net/jeps/218 class Box<T> { } new Box<int>();
73. JEP draft 8222777: Records and Sealed Types https://openjdk.java.net/jeps/8222777 record Point(int x, int y) { }
74. JEP draft 8223002: Keyword Management for the Java Language https://openjdk.java.net/jeps/8223002
75. JEP draft 8201462: Better hash codes http://openjdk.java.net/jeps/8201462
76. JEP draft 8209964: Lazy Static Final Fields http://openjdk.java.net/jeps/8209964 private final static Logger LOGGER = Logger.getLogger("com.foo.Bar");
77. JEP 357: Migrate from Mercurial to Git https://openjdk.java.net/jeps/357
78. www.innoq.com innoQ Deutschland GmbH Krischerstr. 100 40789 Monheim am Rhein Germany +49 2173 3366-0 Ohlauer Str. 43 10999 Berlin Germany +49 2173 3366-0 Ludwigstr. 180E 63067 Offenbach Germany +49 2173 3366-0 Kreuzstr. 16 80331 München Germany +49 2173 3366-0 innoQ Schweiz GmbH Gewerbestr. 11 CH-6330 Cham Switzerland +41 41 743 0116 Thanks! Questions? Michael Vitz michael.vitz@innoq.com michaelvitz +49 151 19116015 https://www.innoq.com/en/talks/2019/07/geektastic-düsseldorf-juli-2019-neues-von-java-und-jdk/