26 Java Years - Speaker Deck

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Shin Tanimoto 26 Java Years - ͜Ε͕ࠓͷJavaͩʂ #31 ʙΦʔϓϯιʔεϓϩδΣΫτΛࢧ͑Δݴޠͨͪʙ

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୩ຊ ৺ (Shin Tanimoto) ೔ຊJavaϢʔβʔάϧʔϓ Ϧʔμʔʢ୅දʣ Java Champion / Oracle Groundbreaker Ambassador Everforth / Acroquest Technologyͷ2ࣾͰಇ͘ΤϯδχΞ ෭ۀʹͯ֎෦ސ໰΍ʮϨϯλϧ͢΂ΔਓʯͳͲ ੜ͖͕͍͸BABYMETALͷϥΠϒࢀઓ ࣗݾ঺հ 2 Twitter : @cero_t ஶॻ : Javaຊ֨ೖ໳

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೔ຊJavaϢʔβʔάϧʔϓ (JJUG) 2007೥4݄ʹൃ଍ͨ͠JavaͷϢʔβʔձ ౦ژΛத৺ͱͨ͠ษڧձ΍ΧϯϑΝϨϯεͷ։࠵ʢݱࡏ͸ΦϯϥΠϯத৺ʣ ߨࢣ೿ݣ΍ग़ுΠϕϯτͳͲɺ೔ຊ֤஍ͷJavaίϛϡχςΟͱڠྗ͍ͯ͠Δ ن໛ ձһ਺ 10,000໊Ҏ্ ݄ྫͷษڧձʹ͸਺ඦ໊ɺ೥2ճͷΧϯϑΝϨϯεʹ͸1,000໊Ҏ্͕ࢀՃ JavaϢʔβʔάϧʔϓ 3

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Javaʁ

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ݻ͍ ݹ͍ μα͍ ͑ɺJavaʁ 5

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੩తܕ෇͚ݴޠ ΦϒδΣΫτࢦ޲ Java͸ݻ͍ʁ 6

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੩తܕ෇͚ݴޠ ίϯύΠϧ࣌νΣοΫ΍IDEͷࣗಈิ׬ͷԸܙΛड͚΍͍͢ ΤϯλʔϓϥΠζͳͲͷେن໛ϓϩδΣΫτʹ޲͘ ΦϒδΣΫτࢦ޲ ۩৅ΑΓ΋ந৅Λ޷Ή ۀ຿΍ػೳΛ࣮ݱ͢ΔͨΊͷ࣮૷ΑΓɺͦͷຊ࣭Λߟ͑Δ͜ͱΛ޷Ήਓ͕ଟ͍ Java͸ݻ͍ʁ 7

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࠷ॳͷ͓໨ݟ͔͑Β26೥ɺJDK 1.0ͷϦϦʔε͔Β25೥ Java͸ݹ͍ʁ 8

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࠷ॳͷ͓໨ݟ͔͑Β26೥ɺJDK 1.0ͷϦϦʔε͔Β25೥ Pythonઌഐͷ4ίԼ C++ઌੜͷ10ίԼ ޙํޓ׵ੑΛอͪଓ͚͍ͯΔ ϥΠϒϥϦͷαϙʔτͳͲআ͚͹ɺݹ͍ίʔυͰ΋͍͍ͩͨίϯύΠϧ͕௨Δ͠ಈ͘ ৽͍͠API͕௥Ճ͞Εͯ΋ɺݹ͍API͸͍͍ͩͨͦͷ··࢒Δ Java͸ݹ͍ʁ 9

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จࣈྻஔ׵ϝιου Java͸ݹ͍ʁ 10 String str = “12345-12345-12345";    str.replace('1', 'x'); → "x2345-x2345-x2345"ɹ1จࣈ͚ͩࢦఆͯ͠શஔ׵    str.replaceFirst("\\d+", "xyz"); → "xyz-12345-12345"ɹਖ਼نදݱͰࢦఆͯ͠1ճஔ׵    str.replaceAll("\\d+", "xyz"); → "xyz-xyz-xyz"ɹਖ਼نදݱͰࢦఆͯ͠શஔ׵    str.replace("123", "xyz"); → “xyz45-xyz45-xyz45"ɹจࣈྻͰࢦఆͯ͠શஔ׵

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จࣈྻஔ׵ϝιου str.replace(‘1’, ‘x’); → ࠷ॳ͔Β͋Δʢ1996೥ʣ str.replaceFirst(“\\d+”, “xyz”); → Java 1.4Ͱ௥Ճʢ2002೥ʣ str.replaceAll(“\\d+”, “xyz”); →Java 1.4Ͱ௥Ճʢ2002೥ʣ str.replace(“123”, “xyz”); → Java 1.5Ͱ௥Ճʢ2004೥ʣ ޙํޓ׵ੑΛอͭͨΊɺݹ͍APIΛ࡟আ͠ͳ͍ Java͸ݹ͍ʁ 11

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Java͸μα͍ʁ 12

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μαͳ͍Θʂʂɹμα͍ݴ͏΍͕ͭμα͍Μ͡Όʂʂ😭 Java͸μα͍ʁ 13

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ؔ਺ܕͬΆ͘දهͰ͖ΔϥϜμࣜͷಋೖ͸2014೥ͱ஗Ί ෳ਺ͷاۀ΍ஂମͷ߹ҙʹΑͬͯ࢓༷Λࡦఆ͢ΔΦʔϓϯͳϓϩηε Java Community ProcessʢJCPʣ ࢓༷ܾఆޙɺ֤͕࣮ࣾ૷ΛఏڙʢOracleɺIBMɺAzulɺBellSoftɺSAPͳͲʣ ߹ҙܗ੒͕ඞཁͰ͋Γɺ·ͨޙํޓ׵ੑͷҡ࣋Λॏࢹ͢ΔͨΊɺ   ৽͍͠จ๏΍ػೳͷఏڙ͸ɺଞͷݴޠʹൺ΂ͯগ͠஗ΕΔ ͦͷ෼ɺݎ࿚Ͱ͋ΓಛఆϕϯμͷϩοΫΠϯΛආ͚ΒΕΔ Java͸μα͍ʁ 14

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Java͍͍͡ΌΜ 15 😊

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؆୯ͳྺ࢙ͱ༻ޠ

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1995೥ : Sun MicrosystemsࣾʹΑΓॳ͓൸࿐໨ 1996೥ : JDK 1.0ϦϦʔεʢJDK = Java Development Kitʣ 2006೥ : OSSԽ 2010೥ : Oracle͕ࣾSun MicrosystemsࣾΛങऩ 2014೥ : Java 8ͷϦϦʔεɻؔ਺ܕ෩ͷهड़͕Ͱ͖ΔΑ͏ʹͳΓɺվΊͯ஫໨͕ू·ΔΑ͏ʹͳͬͨ 2017೥ : Java 9ͷϦϦʔεɻҎ߱൒೥͝ͱʹ࣍όʔδϣϯΛϦϦʔε͢ΔΑ͏มߋ Javaͷ؆୯ͳྺ࢙ 17

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JavaVM : Java Virtual MachineɻJavaΛಈ࡞ͤ͞ΔԾ૝ϚγϯɻJVMͱ΋දه͢Δ Java͸࣮ߦՄೳͳόΠφϦΛ࡞ΔͷͰ͸ͳ͘ɺίϯύΠϧͨ͠ϑΝΠϧΛJavaVM্Ͱಈ࡞ͤ͞Δํࣜ Java SE : ͍ΘΏΔJavaຊମ JDK : Java Development KitɻίϯύΠϥͳͲͷ։ൃπʔϧ JRE : Java Runtime EnvironmentɻJavaVM΍ඪ४ϥΠϒϥϦͳͲͷ࣮ߦ؀ڥ ݱࡏ͸JRE୯ମͰͷఏڙ͸͞Εͳ͘ͳͬͨ جૅ༻ޠ 18

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Java EEʢݱJakarta EEʣ : αʔόΞϓϦέʔγϣϯ޲͚ͷAPαʔό΍ϥΠϒϥϦ܈Λఏڙ Java ME : ૊ΈࠐΈ୺຤޲͚ͷJava JVMݴޠ : JavaVMͷ্Ͱಈ࡞͢ΔJavaͰ࣮૷͞Εͨݴޠ ScalaɺKotlinɺGroovyɺJRubyɺJythonͳͲ TCK : Technology Compatibility KitɻJavaͷޓ׵ੑΛ਍அ͢ΔπʔϧΩοτ ֤ࣾͷJava࣮૷͸TCKΛ௨ͬͯ͸͡ΊͯJavaͱೝఆ͞ΕΔ Oracleʢݩʑ͸Sun Microsystemsʣ͕ఏڙ͍ͯ͠Δ جૅ༻ޠ 19

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JavaΛऔΓר͘OSS

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ΤϯλʔϓϥΠζܥͰ࢖ΘΕΔ͜ͱ͕ଟ͍ݴޠͰ͋Γͳ͕Βɺ2000೥ࠒ͔Β   ։ൃ؀ڥ΍ϥΠϒϥϦɺϑϨʔϜϫʔΫͳͲʹOSSϓϩμΫτ͕੝Μʹ࢖ΘΕΔΑ͏ʹͳͬͨ ʢ΋ͪΖΜϓϩϓϥΠΤλϦͳϓϩμΫτ΋ͨ͘͞Μ͋ͬͨʣ Eclipse IDEɺStrutsɺSpringɺSeasar2ͳͲ ݱࡏ͸Javaࣗମ͕OSSԽ͞Εɺෳ਺ͷاۀ΍ஂମ͔ΒOSS൛ͷJDK͕ఏڙ͞Ε͍ͯΔ OSSΛऔΓר͘ΤίγεςϜ͕੒ख़͍ͯ͠Δݴޠͷͻͱͭͱݴ͑Δ Java͸OSSͱڞʹาΜͰ͖ͨݴޠ 21

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OSSϓϩμΫτΛఏڙ͢Δ/͍ͯͨ͠ओͳஂମ Apache Jakarta Projectʢ1999೥-2011೥ʣ Eclipse Foundationʢ2002೥-ʣ Spring Projectʢ2004೥ࠒ-ʣ SeasarϑΝ΢ϯσʔγϣϯʢ2005೥-2019೥ʣ Java͸OSSͱڞʹาΜͰ͖ͨݴޠ 22

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Apache Jakarta Projectʢ1999೥-2011೥ʣ ଟ͘ͷJavaͷOSSϓϩμΫτΛఏڙ͍ͯͨ͠ஂମɻOSSϓϩμΫτͷड͚ࡼͱ΋ݴ͑Δ ιʔείʔυ΍όΠφϦΛμ΢ϯϩʔυͰ͖Δ৔ॴ Apache TomatɺAntɺMavenɺLog4jɺStrutsɺCommonsɺLuceneͳͲ 2000೥୅લ൒ͷJavaΤϯδχΞ͸ɺ͍͍ͩͨStrutsͰWebΞϓϦέʔγϣϯΛ࡞Γɺ   Log4jͰϩάΛग़͠ɺCommonsϥΠϒϥϦΛ࢖͍ɺAntͰϏϧυ͠ɺ   Tomcat্ͰՔಇ͍ͤͯͨ͞ Apache Jakarta Project 23

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Apache Jakarta Projectʢ1999೥-2011೥ʣ JavaͷOSSͷΤίγεςϜͷجૅΛ࡞ͬͨஂମͱݴ͑Δ 2011೥ʹ໾ׂΛऴ͑ͯΫϩʔζ͞ΕɺͦΕͧΕͷϓϩμΫτ͕ಠཱͨ͠ Apache Jakarta Project 24

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IBM͕ࣾEclipse IDEΛOSSͱͯ͠ެ։ʢ2002೥ʣ 2000೥୅ͷJava։ൃʹ͓͚ΔओྲྀͷIDEʢ౷߹։ൃ؀ڥʣ ͦΕ·Ͱ͸ΤσΟλΛ࢖͏ਓ͕ଟ͔ͬͨ EclipseҎޙɺྑ͘΋ѱ͘΋JavaͷIDE͸OSS͔ͭແঈͰఏڙ͞ΕΔΠϝʔδ͕ఆண ͳ͓ɺݱࡏ͸JetbrainsࣾͷIntelliJ IDEA͕ओྲྀ OSSͷίϛϡχςΟ൛ͱɺ༗ঈͷUltimate൛͕͋Δ Eclipse IDE 25

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Eclipse Foundationʢ2004೥-ʣ ౰ॳ͸Eclipse IDEͷ؅ཧ͕໨త ͦͷޙɺJakarta EEɺOpenJ9ɺEclipse LinkɺEclipse CollectionsͳͲ   ଞͷOSSϓϩμΫτ΋ఏڙ͢ΔΑ͏ʹͳͬͨ Apache Jakarta Projectͷ୅ΘΓʹOSSϓϩμΫτͷड͚ࡼͱͳ͍ͬͯΔ໘΋͋Δ Eclipse Foundation 26

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Spring Projectʢ2004೥ࠒ-ʣ Spring FrameworkΛத৺ͱͨؔ͠࿈ϓϩμΫτͷఏڙ Spring Frameworkࣗମ͕ଞͷϓϩμΫτͱܨ͕Δ͜ͱΛલఏͱͨ͠࢓૊ΈΛ   ఏڙ͢Δ΋ͷͰ͋ΔͨΊɺ༷ʑͳ࿈ܞϓϩμΫτ͕ੜ·Εͨ ݱࡏ΋Spring͕Java։ൃͷओྲྀͱͳ͍ͬͯΔʢSpring Bootʣ Spring Project 27

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Spring Projectʢ2004೥ࠒ-ʣ ։ൃͷओମͰ͋ͬͨSpringSourceࣾ͸ɺVMWareࣾʹങऩ͞ΕɺPivotalࣾʹҠ؅͞Εɺ ࠶౓VMWareࣾʹങऩ͞ΕΔͳͲมભͨ͠ Spring FrameworkΛ࠷ॳʹ࡞ͬͨRod Johnsonࢯ͸Spring ProjectΛ཭Εͯٱ͍͠ ͦͷΑ͏ͳঢ়گͰ΋ਐԽ͠ଓ͚͍ͯΔ͜ͱ͕ɺOSSϓϩμΫτͷڧΈͷҰͭͩͱݴ͑Δ Spring Project 28

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SeasarϑΝ΢ϯσʔγϣϯʢ2005೥-2019೥ʣ ೔ຊൃͷOSSϑϨʔϜϫʔΫSeasar2Λத৺ͱͨ͠਺ଟ͘ͷOSSϓϩμΫτΛఏڙ S2DaoɺS2StrtusɺS2JSFɺSAStrutsɺS2JDBCͳͲ 2000೥୅தظͷ೔ຊͷJavaΞϓϦέʔγϣϯ։ൃͰओྲྀͱͳͬͨ SeasarΧϯϑΝϨϯε͸1000໊લޙͷࢀՃऀΛूΊΔҰେΠϕϯτͱͳ͍ͬͯͨ ༏लͳJavaΤϯδχΞ͕ͨͪू͏৔ͱͳΓɺ౰࣌ͷίϛολͨͪ͸ݱࡏͰ΋֤෼໺Ͱ׆༂͍ͯ͠Δ SeasarϑΝ΢ϯσʔγϣϯ 29

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ओྲྀͱͳͬͨOSSϓϩμΫτͷػೳ͕ɺJavaͷඪ४ػೳͱͯ͠औΓࠐ·ΕΔྲྀΕ͕ੜ·Εͨ Spring Framework → CDIʢDIίϯςφʣ Hibernate → JPAʢDBΞΫηεʣ Scala΍KotlinͳͲͷJavaVM্Ͱಈ͘ݴޠͷػೳ → Stream APIʢؔ਺ܕ෩ͷهड़ʣ OSS͔Βඪ४΁ 30

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༷ʑͳاۀ΍ஂମɺ·ͨJavaΤϯδχΞͨͪͷߩݙʹΑΓɺ   JavaͷOSSΤίγεςϜ͸੒ख़͍ͯͬͨ͠ ͍·Ͱ͸Javaͦͷ΋ͷ΋OSSԽ͞Εɺෳ਺ͷاۀ΍ஂମ͔Βఏڙ͞Ε͍ͯΔ ͔͢͠͠΂͕ͯॱ෩ຬൕͩͬͨΘ͚Ͱ͸ͳ͘ɺաڈʹ͸Կ౓͔େ͖ͳࣄ݅΋ى͖ͨ OSSͱJava 31

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Javaք۾ͷOSSͰى͖ͨ໰୊

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Java͕OSSԽ͢Δࡍ΍ɺଞ͕ࣾఏڙ͢Δ৔߹ʹিಥ͢Δ͜ͱ΋͋ͬͨ աڈʹى͖ͨ໰୊ Apache Harmonyࣄ݅ Androidࣄ݅ Googleૌুࣄ݅ Javaք۾ͷOSSͰى͖ͨ໰୊ 33

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લఏͱͳΔഎܠͱͯ͠ɺJavaΛఏڙ͢ΔSun Microsystems͸   ʮJavaʹΑ͘ࣅ͍ͯΔ͕ݫີʹ͸Javaͱݺ΂ͳ͍΋ͷʯ͕ʮJavaʯΛ໊৐Δ͜ͱΛڋΜͩ Javaͷ෼அΛ๷͙ͨΊ ʮWrite Once, Run AnywhereʯͷϙϦγʔΛकΔͨΊ Javaք۾ͷOSSͰى͖ͨ໰୊ 34

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2006೥ɺJavaͷOSS࣮૷ͱͯ͠ʮApache Harmonyʯ͕ఏڙ͞Εͨ Apache License 2.0Ͱఏڙʢվมͨ͠ࡍͷιʔείʔυͷެ։ٛ຿͕ͳ͍ʣ˞Ҏ߱AL-2.0ͱදه͢Δ ͔͠͠౰࣌ɺSun Microsystems͸Apache Harmony΁ͷTCKͷఏڙΛڋ൱ TCKΛ௨͍ͯ͠ͳ͍࣮૷͸JavaͱೝΊΒΕͳ͍ Apache Harmony͸૊ΈࠐΈ୺຤Ͱ΋ಈ࡞͕ͨ͠ɺ౰࣌ͷTCK͸૊ΈࠐΈ୺຤ʹద༻Ͱ͖ΔJavaΛର৅֎ͱ͍ͯͨ͠ ಉ͘͡2006೥ɺSun Microsystems͕Java SEΛOSSԽʢݱࡏͷOpenJDKʣ GPLv2Ϋϥεύεྫ֎͖ͭʢվมͨ͠ࡍʹιʔείʔυͷެ։ٛ຿͕͋Δʣ˞Ҏ߱GPLv2ͱදه͢Δ Apache harmonyࣄ݅ 35

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2007೥ɺSun Microsystems͸TCKΛOSSͱͯ͠ެ։ͨ͠΋ͷͷ   OSS൛ͷJava͸ϥΠηϯε͕GPLv2ͷ΋ͷͷΈΛର৅ͱͨ͠ Apache Harmony͸AL-2.0ͩͬͨͨΊର৅֎ ࣮࣭తʹ͸Sun Microsystems͕OSSԽͨ͠JDKͷΈ͕ର৅ͱͳ͍ͬͯͨܗ ౰વApache͸߅ٞ͠ɺ֤ॴͰٞ࿦͕ى͖ͨ ݁ہApache Harmony͸Javaͱͯ͠ೝΊΒΕͳ͍··ɺ2010೥ʹ։ൃΛऴྃͨ͠ Apache harmonyࣄ݅ 36

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2007೥ʹGoogle͕AndroidΛൃද Android͸Apache HarmonyΛϕʔεͱͨ͠Dalvik VMΛ౥ࡌ Javaʢతͳ΋ͷʣͰAndroidΞϓϦέʔγϣϯΛ։ൃͰ͖Δ ΋ͪΖΜTCK͸௨͍ͬͯͳ͍ ιʔείʔυͷ֦ுࢠ͸.java͕ͩɺTCKΛ௨͍ͬͯͳ͍ͷͰJavaͰ͸ͳ͍ Sun Microsystems͸Javaͷ෼அΛট͘ͱͯ͠ɺAndroidͷJavaʢతͳ΋ͷʣΛඇ೉ Androidࣄ݅ 37

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౰࣌ͷܞଳి࿩͸Java ME͕౥ࡌ͞Ε͍ͯͨ ೔ຊͰ͸υίϞͱιϑτόϯΫ͕ɻau͸BREWʢC++ʣ Apple͕iPhoneΛϦϦʔεͯ͠࿩୊ͱͳΓɺGoogle΋ٸ͍ͰޙΛ௥͏ඞཁ͕͋ͬͨ Android޲͚ʹJavaVMΛಠࣗվม͢Δඞཁ͕͋Γɺιʔείʔυͷެ։ٛ຿ͷ͋ΔGPLv2ͷ OpenJDKΛ࢖͍ͮΒ͔ͬͨͨΊɺެ։ٛ຿ͷͳ͍AL-2.0ͷApache HarmonyΛϕʔεʹͨ͠ʢਪଌʣ Google಺Ͱ΋͖ͪΜͱTCKΛ௨͢΂͖ͩͱ͍͏ҙݟ͸ग़͍͕ͯͨ   Apache HarmonyϕʔεͳͷͰ௨ΓΑ͏͕ͳ͔ͬͨ Androidࣄ݅ 38

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2010೥4݄ʹOracle͕Sun MicrosystemsΛങऩ 2010೥8݄ʹOracle͕GoogleΛૌু AndroidͷJavaʢతͳ΋ͷʣ͕Javaͷஶ࡞ݖΛ৵֐͍ͯ͠Δͱ͍͏಺༰Ͱૌু ཌ೥Ҏ߱ɺGoogle͸Javaͷ೥࣍ΧϯϑΝϨϯεJavaOneʹࢀՃ͠ͳ͘ͳΓɺ   JavaͷOSSϓϩμΫτͷఏڙʹ΋ফۃతʹͳͬͨ Android͕αϙʔτ͢ΔJavaͷόʔδϣϯ΋6΍7Ͱఀࢭͨ͠ʢؔ਺ܕ෩ͷهड़͕Ͱ͖ͳ͍ʣ Googleૌুࣄ݅ 39

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ૌুͷ݁຤ ಛڐݖ৵֐ → ͍ͯ͠ͳ͍Ͱ֬ఆ JavaϥΠϒϥϦͷ࣮૷ίʔυΛແஅෳ੡ → ͍ͯ͠Δ͕͔ᷮ͘͝ͳͷͰഛঈۚ0ԁ Java APIͷஶ࡞ݖ৵֐ → ͍ͯ͠Δ͕ϑΣΞϢʔεͩͱ֬ఆ ܞଳి࿩͕εϚʔτϑΥϯʹஔ͖׵ΘΓɺJava ME͕࢖ΘΕͳ͘ͳͬͨ͜ͱͰ   Sun Microsystems΍Oracle͸ϞόΠϧ෼໺ʹ͓͚ΔJavaͷϏδωεΛࣦ͏͜ͱͱͳͬͨ Googleૌুࣄ݅ 40

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ݱࡏ͸ɺOpenJDK͕།ҰͷOSS൛Javaͱͳ͍ͬͯΔ Apache Harmony΍IcedTeaͳͲͷOSS JavaϓϩδΣΫτ͸͢΂ͯOpenJDKʹ߹ྲྀͨ͠ 2016೥ʹ͸Android΋OpenJDKϕʔεͱͳΓɺJava8ʹରԠͨ͠ ͨͩͦͷࠒʹ͸AndroidΞϓϦ։ൃͷओྲྀ͸Java͔ΒKotlinʹҠ͍ͬͯͬͨ Java6΍7Ͱ΋࣮ߦͰ͖ɺϞμϯͳهड़΋Ͱ͖ΔͨΊ OpenJDK 41

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༗ঈԽʁ໰୊

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Java͸͜Ε·Ͱ2ʙ3೥͝ͱʹ৽͍͠όʔδϣϯ͕ग़͍͕ͯͨ   2017೥ͷJava 9Ҏ߱͸൒೥͝ͱʹϦϦʔε͞ΕΔ͜ͱͱͳͬͨ ৽ػೳ͕ἧ͔ͬͯΒϦϦʔε͢ΔͷͰ͸ͳ͘   ൒೥͝ͱʹؒʹ߹ͬͨػೳͷΈΛ࠾༻ͯ͠ϦϦʔε͢Δ ଞͷػೳ͕·ͩͰ͖͍ͯͳ͍͔Βɺͱ͍͏ཧ༝Ͱ৽ػೳͷϦϦʔε͕   ஗ΕΔ͜ͱΛ๷͙ͨΊ JavaͷϦϦʔεαΠΫϧͷมߋ 43

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JavaΤϯδχΞ͕Javaͷ։ൃ؀ڥΛߏங͢Δࡍɺ   ओྲྀ͸Oracleʢݩʑ͸Sun Microsystemsʣ͕ఏڙ͢ΔJDK/JREΛ༻͍͍ͯͨ Oracle͸͜ͷOracle JDKͷແঈఏڙΛதࢭ͠ɺJava 9Ҏ߱͸OpenJDKͷΈΛ   ແঈఏڙ͢ΔΑ͏ํ਑Λมߋͨ͠ ͜Ε͕ʮJava͕༗ঈԽ͞ΕΔʯͱ͍͏ޡղͷେݩ Oracle JDKͷແঈ഑෍ऴྃ 44

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Sun/Oracle JDKͷແঈαϙʔτظؒ͸࣍ͷόʔδϣϯ͕ग़ͨ͋ͱ1ʙ2೥ఔ౓ͩͬͨ ྫ͑͹Java 7͸2011೥7݄ϦϦʔεɻແঈαϙʔτ͸2015೥4݄·Ͱ Java 8͸2014೥3݄ϦϦʔε ͜͜Ͱ͍͏ʮແঈαϙʔτظؒʯͱ͸ʮແঈΞοϓσʔτ͕ఏڙ͞ΕΔظؒʯΛࢦ͢ ಛʹηΩϡϦςΟύονͳͲ΋͋ΔͨΊɺແঈΞοϓσʔτ͕ఏڙ͞ΕΔ͜ͱ͸ॏཁ ༗ঈͰ͋Ε͹΋ͬͱ௕ظؒͷαϙʔτΛड͚ΒΕΔ Java 7͔ΒJava 8΁ͷҠߦ͸1ʙ2೥͘Β͍ͷ༛༧͕͋Δͱݴ͑Δ JDKͷαϙʔτظؒ 45

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Oracle OpenJDKͷແঈαϙʔτظؒ͸ʮ࣍ͷόʔδϣϯ͕ग़Δ·Ͱʯ ͭ·Γ൒೥͔ؒ͠Ξοϓσʔτ͕ఏڙ͞Εͳ͍ ൒೥ޙʹ͸࣍ͷόʔδϣϯʹҠߦ͢Δඞཁ͕͋Δ ͜Ε͕ʮJava͕༗ঈԽ͞ΕΔʯͱ͍͏ޡղʹഥंΛֻ͚ͨ OpenJDKͷαϙʔτظؒ 46

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֤͔ࣾΒOpenJDKͷϏϧυʢ͍ΘΏΔσΟετϦϏϡʔγϣϯʣ͕ఏڙ͞ΕΔΑ͏ʹͳͬͨ Red Hat OpenJDKɺEclipse AdoptiumʢچAdoptOpenJDKʣɺAmazon CorrettoͳͲ ֤ࣾͷOpenJDK͸3೥͝ͱʹग़ΔόʔδϣϯʹLTSʢLong Term SupportʣΛఏڙ OpenJDK 8ɺ11ɺ17ɺ23ɺɺɺ ແঈαϙʔτظؒ͸༷ʑ͕ͩɺͨͱ͑͹AdoptiumͷOpenJDK 8͸2026೥·Ͱ े෼ʹ௕͍ແঈαϙʔτظ͕ؒ͋Δͱݴ͑Δ ༷ʑͳOpenJDK 47

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͍·ͷओྲྀ͸ϓϥοτϑΥʔϜͰαϙʔτ͞Ε͍ͯΔOpenJDKΛར༻͢Δ͜ͱ Red Hat Enterprise LinuxΛ࢖͏ͳΒRed Hat OpenJDK AWSͰ࢖͏ͳΒAmazon Corretto AzureͰ࢖͏ͳΒMicrosoft Build of OpenJDK ֶश΍ௐࠪ༻ͳΒαϙʔτظؒͷ୹͍Oracle OpenJDKͰ΋ߏΘͳ͍ ֤͕ࣾఏڙ͢ΔOpenJDKʹ͓͍ͯগͣͭ͠ఏڙ͢Δπʔϧ͕ҧͬͨΓɺద༻͞ΕΔύον͕ҟͳΔ͜ͱ͸   ͋ΓಘΔ͕ɺݩͱͳΔOpenJDK͸ಉҰͰ͋ΔͨΊͲΕΛ࢖ͬͯ΋99%ಉ͡ɻίΞػೳ͸100%ಉ͡ ༷ʑͳOpenJDK 48

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·ͱΊ: ͜Ε͔ΒͷJava

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͜ͷΑ͏ͳឯ༨ۂંΛܦͯɺOSS൛ͷJava͸OpenJDKͱͯ͠ҰຊԽ͞Εͨ ෳ਺ͷاۀ΍ஂମɺݸਓʹΑΓ࣮૷ɺϝϯςφϯε͞Ε͍ͯΔ ͪͳΈʹ೔ຊʹ΋OpenJDKͷίϛολ͕͍ΔΑ ݱ୅ʹ͓͍ͯݴޠ΍ϓϥοτϑΥʔϜ͕OSSͰ͋Δ͜ͱ͸౰ͨΓલͷΑ͏ʹײ͡Δ͕   JavaͷΑ͏ʹ௕͍ྺ࢙͕͋ͬͯڊେͳΤίγεςϜΛ൐͏΋ͷΛ   OSSจԽͷਁಁ΍੒ख़ͱڞʹOSSԽ͢Δͱ͜Ζʹ͸૬౰ͳ౒ྗ͕͋ͬͨͱݴ͑Δ OSSʹͳͬͨJava 50

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GraalVMʹΑΔωΠςΟϒΠϝʔδͷ࡞੒ ίϯύΠϧͨ͠΋ͷΛJavaVM্Ͱ࣮ߦ͢ΔͷͰ͸ͳ͘   ίϯύΠϧͯͦ͠ΕͧΕͷOS͝ͱʹ࣮ߦՄೳͳόΠφϦΛ࡞Δ ىಈ࣌ؒͷ୹ॖɺϝϞϦ࢖༻ྔͷ࡟ݮ ϊϯϒϩοΩϯάॲཧ΍ܰྔεϨουʹΑΔฒྻॲཧͷվળ Reactor΍RxJavaͳͲΛ༻͍ͨϦΞΫςΟϒϓϩάϥϛϯάʢOSSϓϩμΫτʣ Project LoomʹΑΔܰྔεϨου΍ݶఆܧଓͷఏڙʢJavaͷඪ४ػೳʹೖΔ༧ఆʣ ࠷ۙͱࠓޙͷJavaͷτϨϯυ 51

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൒೥͝ͱͷϦϦʔεʹͳΓɺҎલΑΓ΋ػೳ௥Ճͷεϐʔυ͕૿ͨ͠ Flight RecorderʢJavaVMͷϝτϦΫε৘ใΛه࿥͢Δɻ঎༻ػೳͩͬͨ΋ͷ͕OSSԽʣ switchࣜʢswitch͕จ͚ͩͰͳࣜ͘ͱͯ͠࢖͑ΔΑ͏ʹͳΓɺ஋ΛฦͤΔʣ ςΩετϒϩοΫʢ͍ΘΏΔώΞυΩϡϝϯτɻෳ਺ߦͷจࣈྻΛએݴͰ͖Δʣ Ϩίʔυܕʢσʔλܕʹ͍ۙɻΠϛϡʔλϒϧͳσʔλΫϥεΛ༰қʹ࡞ΕΔʣ ύλʔϯϚονʢΦϒδΣΫτͷܕʹΑͬͯ෼ذ͢Δʣ ػೳ௥Ճͷߴ଎Խ 52

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ܧଓతͳֶश͕ඞཁ ݹ͍஌ࣝͷ··Ͱ΋ϓϩάϥϛϯάͰ͖Δ͕ɺͦΕ͕ਖ਼͍͠Θ͚Ͱ͸ͳ͍ ৽͍͠ػೳ͕࢖ΘΕͨιʔείʔυΛಡΊͳ͍ͱࠔΔͰ͠ΐ͏ ܧଓతͳֶशΛଅ͢ίϛϡχςΟͷॏཁੑ͕૿͢ ఆظతͳษڧձ΍৘ใൃ৴ͳͲ ػೳ௥Ճͷߴ଎Խ΁ͷରԠ 53

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ܧଓతͳόʔδϣϯΞοϓ͕ඞཁ ͤΊͯ3೥͓͖ʹϦϦʔε͞ΕΔLTS൛ʹ௥ै͍ͤͨ͞ ୯७ʹJavaͷόʔδϣϯ͚ͩͰͳ͘ɺपลϥΠϒϥϦ΍ϑϨʔϜϫʔΫɺ   ϛυϧ΢ΣΞͷόʔδϣϯΞοϓ͕ඞཁͱͳΔέʔε΋ଟ͍ όʔδϣϯΞοϓʹ௥ै͢ΔͨΊͷCI/CD΍ࣗಈςετͷ࢓૊Έ͕ෆՄܽ DevOpsվળɺͻ͍ͯ͸ΤϯδχΞ΍૊৫ͷ࣭ΛߴΊΔ ʢόʔδϣϯΛԘ௮͚ʹ͢Δͱ͍͏બ୒ࢶ΋ΞϦͰ͚͢Ͳ΋ʣ ϦϦʔεαΠΫϧͷߴ଎Խ΁ͷରԠ 54

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Java͸OSSจԽͱڞʹาΈɺJavaࣗ਎΋OSSԽ͞Εͨ ༷ʑͳOSSϓϩμΫτ͕ੜ·ΕɺJavaඪ४ʹऔΓࠐ·ΕΔྲྀΕ΋ੜ·Εͨ ଟ͘ͷ૊৫΍ݸਓͷߩݙʹࢧ͑ΒΕ͍ͯΔ ։ൃݩͷاۀ͕ങऩ͞Εͯ΋ɺOSSϓϩμΫτ͸าΈ͕ࢭ·Βͳ͍ ϦϦʔε͕ߴ଎Խ͞Εɺػೳ௥Ճ͕ૣ͘ͳͬͨ ։ൃίϛϡχςΟ΍ϢʔβʔάϧʔϓͳͲͷॏཁੑ͸ࠓޙ΋૿͍ͯ͘͠ ·ͱΊ 55

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ຖ݄ͷJJUGφΠτηϛφʔ ࣍ճ͸9/29(ਫ)༧ఆ - Java 17ϦϦʔεه೦ηϛφʔ ೥ʹ2ճͷJJUG CCC ࣍ճ͸11/21(೔) URL: https://www.java-users.jp/ Twitter: @JJUG JJUGʹࢀՃ͠Α͏ʂ 56