Prepare for Java 9 #jjug

4. 4 • JavaOne2016 (9/18-22) • [O] Java 8 非推奨ョン Java 9 動い Perm 代表例！ • JavaOne 報告会東京 (10/15) • [私] (コ＆動作確認 ) 通使わいう注意！ • JDK-8167446: Add back PermSize and MaxPermSize (10/19) 実例 1 Copyright©2016 NTT corporation 完全無視手直必要変わせ

5. 5 • JavaOne2016 (9/18-22) • [O] Java 8 非推奨ョン Java 9 動い Perm 代表例！ • JavaOne 報告会東京 (10/15) • [私] (コ＆動作確認 ) 通使わいう注意！ • JDK-8167446: Add back PermSize and MaxPermSize (10/19) 実例 1 Copyright©2016 NTT corporation 完全無視手直必要変わせ

8. 8 Disclaimer: who I am Copyright©2016 NTT corporation 発表時自己紹あせ本資料人書いい質問 Twitter 等う！ KUBOTA Yuji (@sugarlife), hard-of-hearing kubota.yuji@gmail.com OpenJDK Technical Support Engineer in NTT OpenJDK Author (ykubota) IcedTea Committer

11. 11 •GA release schedule (ML 投票決定) • 2017/7/27 ( ← 2017/3/23 ← 2016/9/23 ) •JEP: 87 89 個 (openjdk.java.net/projects/jdk9) • 機能 ( 様策定参照実装) •JSR 379: Java SE 9 Release Contents •JCP 様承認概要 Copyright©2016 NTT corporation 様策定 JCP 役目 , JEP ML 策定

24. 24 Module Copyright©2016 NTT corporation 依性定義方法 JAR module com.foo.bar { //依 requires com.foo.baz; requires java.sql; } com.foo.bar.alpha.Alpha com.foo.bar.beta.Beta com.foo.internal.Internal ： JAR module-info.java 依性

25. 25 Module Copyright©2016 NTT corporation 公開制限定義方法 JAR module com.foo.bar { //依 requires com.foo.baz; requires java.sql; //公開 to 公開先 exports com.foo.bar.alpha; exports com.foo.bar.beta to com.foo.ok; } com.foo.bar.alpha.Alpha com.foo.bar.beta.Beta com.foo.internal.Internal ： JAR module-info.java 依性公開制限

26. 26 Module Copyright©2016 NTT corporation com.foo.bar java.sql com.foo.internalcom.foo.bar.alpha java.logging com.foo.baz reads com.foo.app com.foo.bar.beta com.foo.ok : : : :図う依性公開制限定義 module com.foo.bar { //依 requires com.foo.baz; requires java.sql; //公開 to 公開先 exports com.foo.bar.alpha; exports com.foo.bar.beta to com.foo.ok; } requires

27. 27 Standard library Copyright©2016 NTT corporation 標準巨大いう問題化解決 localhost /jdk9# ./bin/java --list-modules java.activation (file:///jdk9/modules/java.activation/) java.annotations.common (file:///jdk9/modules/java.annotations.common/) java.base (file:///jdk9/modules/java.base/) java.compact1 (file:///jdk9/modules/java.compact1/) java.compact2 (file:///jdk9/modules/java.compact2/) java.compact3 (file:///jdk9/modules/java.compact3/) java.compiler (file:///jdk9/modules/java.compiler/) java.corba (file:///jdk9/modules/java.corba/) :

29. 29 Standard library Copyright©2016 NTT corporation jdeps コン依い確認 localhost /jdk9# ./bin/jdeps /tmp/heapstats-analyzer.jar heapstats-analyzer.jar -> java.base heapstats-analyzer.jar -> java.datatransfer heapstats-analyzer.jar -> java.desktop heapstats-analyzer.jar -> java.logging heapstats-analyzer.jar -> java.management heapstats-analyzer.jar -> java.rmi heapstats-analyzer.jar -> not found jp.co.ntt.oss.heapstats -> java.io java.base jp.co.ntt.oss.heapstats -> java.lang java.base jp.co.ntt.oss.heapstats -> java.lang.invoke java.base :

30. 30 Standard library Copyright©2016 NTT corporation 見当い not found localhost /jdk9# ./bin/jdeps /tmp/heapstats-analyzer.jar heapstats-analyzer.jar -> java.base heapstats-analyzer.jar -> java.datatransfer heapstats-analyzer.jar -> java.desktop heapstats-analyzer.jar -> java.logging heapstats-analyzer.jar -> java.management heapstats-analyzer.jar -> java.rmi heapstats-analyzer.jar -> not found jp.co.ntt.oss.heapstats -> java.io java.base jp.co.ntt.oss.heapstats -> java.lang java.base jp.co.ntt.oss.heapstats -> java.lang.invoke java.base : OpenJDK JavaFX 含いい not found jp.co.ntt.oss.heapstats -> javafx.application not found jp.co.ntt.oss.heapstats -> javafx.collections not found

31. 31 Standard library Copyright©2016 NTT corporation 標準化一 localhost /jdk9# ./bin/jdeps /tmp/heapstats-analyzer.jar heapstats-analyzer.jar -> java.base heapstats-analyzer.jar -> java.datatransfer heapstats-analyzer.jar -> java.desktop heapstats-analyzer.jar -> java.logging heapstats-analyzer.jar -> java.management heapstats-analyzer.jar -> java.rmi heapstats-analyzer.jar -> not found jp.co.ntt.oss.heapstats -> java.io java.base jp.co.ntt.oss.heapstats -> java.lang java.base jp.co.ntt.oss.heapstats -> java.lang.invoke java.base : OpenJDK JavaFX 含いい not found jp.co.ntt.oss.heapstats -> javafx.application not found jp.co.ntt.oss.heapstats -> javafx.collections not found jlink コン必要最低限構成実行可能 java 作成

34. 34 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation /jdk9/bin# ./jshell | Welcome to JShell -- Version 9-internal | For an introduction type: /help intro jshell>

35. 35 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation /jdk9/bin# ./jshell | Welcome to JShell -- Version 9-internal | For an introduction type: /help intro jshell> import java.time.* jshell>

36. 36 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation /jdk9/bin# ./jshell | Welcome to JShell -- Version 9-internal | For an introduction type: /help intro jshell> import java.time.* jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> }

37. 37 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation /jdk9/bin# ./jshell | Welcome to JShell -- Version 9-internal | For an introduction type: /help intro jshell> import java.time.* jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9

38. 38 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9 jshell>

39. 39 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9 jshell> new Java9()

40. 40 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9 jshell> new Java9() $3 ==> Java9@56235b8e jshell>

41. 41 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9 jshell> new Java9() $3 ==> Java9@56235b8e jshell> $3.releaseDate()

42. 42 •REPL (Read-eval-print loop) for Java Project Kulla (JShell) Copyright©2016 NTT corporation jshell> public class Java9 { ...> public void releaseDate() { ...> LocalDateTime d = LocalDateTime.of(2016,9,23,0,0); ...> System.out.println(d.plusMonths(6+4).plusDays(4)); ...> } ...> } | created class Java9 jshell> new Java9() $3 ==> Java9@56235b8e jshell> $3.releaseDate() 2017-07-27T00:00

46. 46 •JavaDoc.Next •HTML 5 •Doclint, Doclet API 改善 •検索機能追加 •JDK release • javac --release コン •Multi-release jar files (META-INF/version/{9,10,…}) 新機能 Copyright©2016 NTT corporation 二 Project 以外新機能あ javac --release N = javac -target N -source N . -bootclasspath=/path/to/N/rt.jar

47. 47 •HTTP 2.0 / The Flow API / … •性能改善 • Re-engineering javac (Tiered Attribution) • “String” + “String” (invokedynamic 利用) •Stream / Collection 改善 • 匿ン演算子 • Static 追加 ({List,Set,Map}#of) 新機能 Copyright©2016 NTT corporation 新機能改善く一部紹

49. 49 OpenJDK Developers’ Guide •Don’t break binary compatibility (言語様) •Avoid introducing source incompatibilities •Manage behavioral compatibility changes http://cr.openjdk.java.net/~darcy/OpenJdkDevGuide/ 互換性 Copyright©2016 NTT corporation Binary > Source > Behavioral

52. 52 •大半内部 API セ化(隠蔽) •JDK 9 コンョン回避可能 •広く使わい物(Critical APIs) 代替用意公開 •jdeps 使影響あ確認推奨 • 特 Multi-Release JAR files (JEP 238) JEP 260: Encapsulate most internal APIs Copyright©2016 NTT corporation 特利用影響けい確認

53. 53 •Critical APIs (keep public) • sun.misc.Unsafe •sun.misc.{Signal,SignalHandler} • sun.misc.Cleaner •sun.reflect.Reflection::getCallerClass • sun.reflect.ReflectionFactory • 以外削除(隠蔽) 例: sun.misc.Base64 JEP 260: Encapsulate most internal APIs Copyright©2016 NTT corporation Critical APIs JDK 10 以降削除可能性あ

54. 54 • 変更以組廃 • Endorsed-standards override •Extension mechanism • -Xbootclasspath, -Xbootclasspath/p, -Dsun.boot.class.path 削除 • AppClassLoader URLClassLoader ンン無く ( 承い)等影響 Change class loaders mechanism in JEP 261: Module System Copyright©2016 NTT corporation Module 化配置推奨いう流

55. 55 •-source / -target 3 世代前サ •JDK 9 場合 1.6 1.5 drop •drop 前ョン非推奨 •JDK 9 場合 1.6 非推奨警告出 JEP 182: Policy for Retiring javac – source and –target options Copyright©2016 NTT corporation JDK 9 ビ JDK 5 動人居い？

58. 58 •javac --release Multi-Release JAR • 自体新機能 •前述非互換性合わせビ多大影響え • Java 9 ンビ最新化必要 JEP 247: Compile for Older Platform Versions JEP 238: Multi-Release JAR Files Copyright©2016 NTT corporation Maven:https://cwiki.apache.org/confluence/display/MAVEN/Java+9+-+Jigsaw

59. 59 •JDK 8 削除済 or 非推奨ョン使場合警告セ出け (無視起動 ) •JDK 9 殆場合起動く • JDK 8 非推奨ョン削除 • Perm 領域関係残無視起動 Unrecognized VM options fail to start Copyright©2016 NTT corporation warning: ignoring option XXX; support was removed in 8.0

61. 61 •1.8.0_101-b14 • 1.$MAJOR.0_$MINOR-b$BUILD •9.1.2+62 • $MAJOR.$MINOR.$SECURITY+$BUILD •java.version, java.specification.version •1.8 9 •version.split(“.”)[1] い … JEP 223: New Version String Scheme Copyright©2016 NTT corporation ョン表記決打込影響

63. 63 •従来 JVM 廃ョン変更 •-Xlog:[<selection>]:[<output>]:[<decorators>] •-Xlog:[出力内容]:[出力先]:[各行装飾] • -XX:+PrintGCDetails -Xloggc:gc.log.`date +%Y- %m-%d_%H-%M-%S` -XX:+PrintGCTimeStamps JEP 158: Unified JVM Logging JEP 271: Unified GC Logging Copyright©2016 NTT corporation Parser 系いい全滅

64. 64 •従来 JVM 廃ョン変更 •-Xlog:[<selection>]:[<output>]:[<decorators>] •-Xlog:[出力内容]:[出力先]:[各行装飾] • -XX:+PrintGCDetails -Xloggc:gc.log.`date +%Y- %m-%d_%H-%M-%S` -XX:+PrintGCTimeStamps • -Xlog:gc*=debug:gc.log.%t:time,level JEP 158: Unified JVM Logging JEP 271: Unified GC Logging Copyright©2016 NTT corporation Parser 系いい全滅

65. 65 • 以組合せ • DefNew + CMS / iCMS •ParNew + SerialOld / iCMS • CMS foreground(s) • -XX:+UseCMSCompactAtFullCollection • -XX:+CMSFullGCsBeforeCompaction • -XX:+UseCMSCollectionPassing JEP 214: Remove GC Combinations Deprecated in JDK 8 Copyright©2016 NTT corporation JDK 8 時点非推奨非サ

67. 67 •JEP 229: Create PKCS12 Keystores by Default •keystore type JKS PKCS12 変更 •JEP 288: Disable SHA-1 Certificates • X.509 証明書ン SHA-1 署利用い場合注意 Improve encryption for security Copyright©2016 NTT corporation コいう利用証明書問題

69. 69 •JEP 289: Deprecate the Applet API • java.applet.{AppletStub,Applet,AudioClip,Apple tContext} • javax.swing.JApplet •Fix insecure issues •Remove support for serialized applets (JDK-8074161) • No longer allow non-strict JNLP Parsing (JDK-8075605) Follow the evolution of WEB Copyright©2016 NTT corporation Web 動向(NPAPI) セキ面非推奨化流

70. 70 • java.util.logging.LogManager #{add|remove}PropertyChangeListener • java.util.jar.Pack200.{Packer|Unpacker}# {add|remove}PropertyChangeListener • com.sun.security.auth.callback.DialogCal lbackHandle Remove deprecated APIs in JEP 162: Prepare for Modularization Copyright©2016 NTT corporation JDK 8 非推奨い API 削除

71. 71 • Toolkit implementers (JDK-8037739) • java.awt.peer package • java.awt.dnd.peer package • Unsupported Apple APIs • com.apple.eawt, com.apple.eio (JEP 272) • com.apple.concurrent (JDK-8148187) • AppleScript scripting engine (JDK-8143404) • com.sun.codec.jpeg (JDK-8038838) Removed APIs Copyright©2016 NTT corporation 関係多い

75. 75 •String 化一環内部 (value) 型 char[] byte[] 変更 •1文毎 2byte(UTF-16) 1byte 扱え 1byte 以外従来通 • 回避内部直接け渡意外多い注意 The value field of String is no longer char[] by JEP 254: Compact Strings Copyright©2016 NTT corporation 文列性能永遠課題

81. 81 •native2ascii • JEP 226 UTF-8 利用可能 •VisualVM •JDK 梱く公式サ得必要あ (blogs.oracle.com/nbprofiler) • https://blogs.oracle.com/java-platform- group/entry/visual_vm_in_jdk_9 Good bye tools Copyright©2016 NTT corporation [PR] heap profiler & visualizer HeapStats ！

82. 82 JEP 228: Add More Diagnostic Commands Copyright©2016 NTT corporation Domain Num. Abstract PerfCounter 1 - Performance Counter ManagementAgent 4 +1 JMX agent Thread 1 - Thread dump GC 8 +2 -1 Heap / GC / Finalization VM 15 +8 Runtime info. (log/native mem/flag/etc.) Compiler 7 - JIT Compiler JVMTI 2 - JVMTI agent Removed GC.rotate_log to VM domain jcmd 機能強化 (基本的新機能)

83. 83 影響あう変更 Copyright©2016 NTT corporation 影響度合い掴い • Windows 32 Client VM 廃 • Unicode CLDR (JEP 252) • -Djava.locale.providers=JRE,SPI 従来通 • JavaDB (Apache Derby) 廃 (JDK-8004716) • Derby 自体 Apache 開発けい • StringBuilder::append 生成コ変更 (JEP 280) • invokedynamic 利用 JDK library function ぶう • 新機能紹性能改善コ関わう処理あい思わ …

Prepare for Java 9 #jjug

Yuji Kubota

Prepare for Java 9 #jjug