Java Bytecode Vertical Tasting

Javaのバイトコードを垂直試飲する

Transcript

1. Java Bytecode
   
   Vertical Tasting
   

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2. 7FSUJDBM5BTUJOHਨ௚ࢼҿͱ͸
   ಉ͡໏ฑͷϫΠϯΛ೥౓ҧ͍Ͱࢼҿ͢Δख๏
   ೥౓͝ͱͷಛ௃Λ೺ѲͰ͖Δ
   ϙςϯγϟϧͱมԽΛ֬ೝ͢Δࣄ͕Ͱ͖Δ
   ࠓճ͸ޙ൒ͷσϞͰ೥౓ҧ͍ͷKBWBDΛ࣮ߦ
   ͠ɺग़དྷ্͕ͬͨDMBTTϑΝΠϧͷಛ௃΍มԽ
   ΛςΠεςΟϯά͍ͨ͠ͱࢥ͍·͢ɻ
   

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3. ຊ೔ఏڙυϦϯΫͷ঺հ
   4VOTFU$FMMBSTϫΠϯछ ന੺
   1BVM(JSBVEͿͲ͏δϡʔε ඍ୸ࢎ
   
   ʮΤϯδχΞ͚ͩͲถࠃͰϫΠφϦʔΛങͬͨ࿩ʯ
   ͷϫΠφϦʔͰ͢
   ίχϟοΫੜ࢈ऀ͕ຖ೥࡞Δ
   ͿͲ͏ՌोͷδϡʔεͰ͢
   ͓ञͰ͸͋Γ·ͤΜ
   
   

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4. ,PUMJO$POGࢀՃ
   w ϫʔΫγϣοϓࢀՃ
   w ͋·Γ"OESPJEΆ͘ͳ͍ηογϣϯΛݟΔ
   w ϏʔϧΛҿΈʹߦ͘
   w ಉ͡ళʹଞͷࢀՃऀ΍+BLF΋͍ͨ
   

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5. ͜ͷτʔΫͷ໨త
   ͠͹Β͘ಡΉͷΛޙճ͠ʹ͍ͯͨ͠+BLF8IBSUPOͷ࠷ۙͷ
   CMPH΍ࠓճͷ࿩ΛҰؾʹಡΜͰΈͯɺͱͯ΋໘ന͔ͬͨͰ
   ͢ɻ
   IUUQTKBLFXIBSUPODPNCMPH
   ͨͩɺॳ৺ऀ΍+BWBͷ஌͕ࣝແ͍ͱ͔ͳΓͱ͖ͬͭʹ͍͘಺
   ༰ͳͷͰɺཧղʹඞཁͱͳΔલఏ஌ࣝͳͲΛͳΔ΂͘Θ͔Γ
   ΍͘͢આ໌͠·͢ɻ
   

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6. ໘ന͔ͬͨτʔΫ
   w 5IFTIVUUMFDBTF4UFQIFO$BSWFS
   w LFZOPUFΞʔΧΠϒಈը I
   ͷ࠷ॳͷηογϣϯ
   w εϖʔεγϟτϧͷࣄނͱൃలͷྺ࢙Λ঺հ
   w "TZODISPOPVT%BUB4USFBNTXJUI,PUMJO'MPXCZ3PNBO&MJ[BSPW
   w ਤղ͕Θ͔Γ΍͍͢$PSPVUJOFͷ࿩
   w ,PUMJO3VOT5BYFTJO/PSXBZCZ+BSMF)BOTFO"OEFST.JLLFMTFO
   w ϊϧ΢Σʔͷࠃ੫γεςϜΛ,PUMJOY4QSJOH#PPUͰӡ༻ͯ͠Δ࿩
   

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7. ࠓճ঺հ͢Δͷ͸
   

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8. Ͱ΋౰೔ݟ·ͤΜͰͨ͠
   w ࠷ۙͷ+BWBͷ࿩ΛΩϟονΞοϓ͍ͯ͠ͳ͔ͬͨ
   w ࣮ࡍʹ৮ͬͨ͜ͱͷ͋Δ࠷৽ͷ+BWB͸
   w ͦ΋ͦ΋࠷৽ͷ"OESPJEͰ΋+BWB·Ͱ͔͠࢖͑ͳ͍
   w ࠷ۙͷঢ়گͱ͔Λௐ΂͔ͯΒษڧ͠Α͏ͱࢥͬͨ
   

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9. ઌʹ+BLFͷ݁࿦Λ·ͱΊΔͱ
   +BWBͷ৽͍͠ػೳ΍7.ͷਐԽ͸,PUMJOʹ΋Ըܙ͕͋ΔɻͳͥͳΒͦΕΒ͸LPUMJOD͔
   Β΋ར༻Մೳ͔ͩΒɻ
   OVMMഇࢭͷಈ͖͸ͳͦ͞͏ͩΑɻڊେͳܕγεςϜʹͱͬͯ͸OVMMͷԸܙ΋͋Δ͔Β
   Ͷɻ
   ,PUMJOʹ͸ϚΠάϨʔγϣϯͱ͔ࣗಈͰग़དྷͪΌ͏͍͢͝*%&͕͋Δ͠ɺͦΕ͸+BWB
   ʹ͸ग़དྷͳ͔ͬͨࣄͩͶɻ
   NVMUJQMBUGPSNͷ໘Ͱ΋,PUMJO͸͔ͳΓΠέͯΔ͠ɺ,PUMJO΋࢖ΘΕଓ͚Δͱࢥ͏Αɻ
   ೥ޙ΋Ҿ͖ଓ͖KBWBͱLPUMJO͸੾᛭ୖຏ͍ͯ͠Δͱࢥ͏ɻ
   

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11. ݁࿦ͷഎܠ ਪଌؚΉ
    
    +BWB͸ϦϦʔεαΠΫϧ΋มԽͯ͠ͲΜͲΜਐԽͯ͠ɺ͜
    ͷϖʔεͩͱ೥ޙʹ͸$PSPVUJOF૬౰ͷ΋ͷ΋ϦϦʔε
    ͞ΕΔݟࠐΈɻ 1SPKFDU-PPNͱ͔
    
    ͦ͏ͳΔͱ,PUMJOͬͯଘࡏҙٛͲͷ͘Β͍ͳͷ ͱ͍͍͏
    ໰͍ʹର͢ΔΞϯαʔηογϣϯ͕ࠓճͷ͓୊Ͱ͢ɻ
    

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12. എܠΛཧղ͢ΔͨΊͷॏཁͳτϐοΫ
    w +BWBϦϦʔεαΠΫϧ
    w "OESPJEͰಈ͘+BWBͬͯ
    w +BLF8IBSUPO#MPHͷ%3TFSJFT ೥݄͘Β͍͔Βͷ࿈࡞
    
    w %ʹΑΔEFTVHBS
    w +BWBͷ৽ػೳ͍Ζ͍Ζ
    w +BWBͷόΠτίʔυΛ஌Δ
    w KBWBDKBWBQͭͷίϚϯυ͕࢖͑Ε͹େৎ෉ େৎ෉͡Όͳ͍
    
    

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13. +BWBͷۙگ
    w ࠷৽όʔδϣϯ͸
    w +BWB͸0SBDMF͕ॴ༗
    w େମ+BWBͷ్த͘Β͍Ͱ4VO͕0SBDMFʹങऩ͞ΕͯΔ
    w େࡶ೺ʹݴ͏ͱ0QFO+%,ͱͦΕʹ঎༻ػೳΛ௥Ճͨ͠0SBDMF+%,͕͋Δ
    w +BWB͋ͨΓ͔Β৽͍͠ϦϦʔεαΠΫϧʹͳͬͨ
    w ΊͬͪΌ৽ػೳ͕௥Ճ͞Ε͍ͯͬͯΔ
    

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14. 8JLJQFEJBΑΓ
    

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15. 8JLJQFEJBΑΓ
    

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16. "OESPJEͱ+BWB
    w "OESPJE"1*Ҏ߱͸+BWBͷຆͲͷػೳΛ࢖͑Δ
    w "OESPJE"1*͸+BWB͔͠ಈ͔ͳ͍
    w NJO4EL7FSTJPO͕ҎԼͩͱ+BWBͷόΠτίʔυ͕ඞཁ
    w ͘Θ͘͠͸ެࣜͰˠ+BWBݴޠػೳͷ࢖༻
    w IUUQTEFWFMPQFSBOESPJEDPNTUVEJPXSJUFKBWBTVQQPSU
    

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17. Ͱ΋+BWBͰ։ൃͰ͖ͯΔ͚Ͳ
    

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18. ͦΕɺ%FTVHBS͞Εͯ·͢
    

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19. EFTVHBS
    

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20. EFTVHBS
    

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21. class Java8 {
    
    interface Logger {
    
    void log(String s);
    
    }
    
    public static void main(String!!... args) {
    
    sayHi(s !-> System.out.println(s));
    
    }
    
    private static void sayHi(Logger logger) {
    
    logger.log("Hello!");
    
    }
    
    }
    
    DMBTTDPVOU
    .FUIPEDPVOU
    ͨͱ͑͹MBNCEB͸
    

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22. ͜͏ͳΔ
    +BWBͰ΋
    ಈ͖ͦ͏
    class Java8 {
    
    interface Logger {
    
    void log(String s);
    
    }
    
    public static void main(String!!... args) {
    
    sayHi(Java8$1.INSTANCE);
    
    }
    
    static void lambda$main$0(String s) {
    
    System.out.println(s);
    
    }
    
    private static void sayHi(Logger logger) {
    
    logger.log("Hello!");
    
    }
    
    }
    
    class Java8$1 implements Java8.Logger {
    
    static final Java8$1 INSTANCE = new Java8$1();
    
    @Override public void log(String s) {
    
    Java8.lambda$main$0(s);
    
    }
    
    }
    
    

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23. class Java8 {
    
    interface Logger {
    
    void log(String s);
    
    }
    
    public static void main(String!!... args) {
    
    sayHi(Java8$1.INSTANCE);
    
    }
    
    static void lambda$main$0(String s) {
    
    System.out.println(s);
    
    }
    
    private static void sayHi(Logger logger) {
    
    logger.log("Hello!");
    
    }
    
    }
    
    class Java8$1 implements Java8.Logger {
    
    static final Java8$1 INSTANCE = new Java8$1();
    
    @Override public void log(String s) {
    
    Java8.lambda$main$0(s);
    
    }
    
    }
    
    Ͱ΋
    ͍Ζ͍Ζ૿͑ͯΔ
    $MBTTDPVOU
    .FUIPEDPVOU
    

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24. ϝιου਺͕૿͑Δͱ
    MULTIDEX
    

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25. MBNCEB͸Ͳ͜ʹߦͬͨͷ
    NJO4EL7FSTJPOʹ͢Ε͹
    /BUJWF-BNCEBΛ࢖͑ΔΆ͍Ͱ͢ɻ
    ૣͯ͘೥ޙ͘Β͍ େମ+BWBͷ࣌ظ
    

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26. +BWB·Ͱͷ৽ػೳ·ͱΊ
    w +BWB
    w MBNCEB
    w NFUIPESFGFSFODF
    w TUBUJDBOEEFGBVMUNFUIPETJOJOUFSGBDFT
    w +BWB
    w $PODJTF5SZ8JUI3FTPVSDFT
    w "OPOZNPVT%JBNPOE
    w 1SJWBUF*OUFSGBDF.FUIPET
    w TUSJOHDPODBUXJUIPVU4USJOH#VJMEFS
    w +BWB
    w 7BSGPSMPDBMWBSJBCMF XIFOUIFUZQFDBOCFJOGFSSFE
    
    w +BWB
    w WBSPOMBNCEBWBSJBCMFT
    w /FTUNBUFT
    w KBWB
    w TXJUDIFYQSFTTJPOT OPU੍ޚจ
    
    w KBWB
    w NVMUJMJOFTUSJOH USJQMFRVPUFT
    
    

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27. +BWBҎ߱༧ఆ͍ͯ͠Δ৽ػೳ
    w KBWB
    w SFDPSET EFTUSVDUVSJOH
    
    w TFBMFEJOUFSGBDF
    w UZQFNBUDIJOH
    w QBUUFSONBUDIJOHPGJOTUBODF
    w KBWB
    w MPDBMGVODUJPO
    w 7JSUVBM5ISFBET -PPN
    
    w KBWB
    w JOMJOFDMBTT
    

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28. ͔͜͜Β͕ຊ୊
    

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29. +BWBͱ+BWBͰϏϧυͯ͠Έ·͢
    public class Outer {
    
    private String name = "Jake";
    
    class Inner {
    
    String sayHi() {
    
    return "Hi " + name + "!";
    
    }
    
    }
    
    }
    
    w
    

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30. ࢖͏ίϚϯυ
    w YYE
    w όΠφϦΛਐ਺Ͱදࣔͯ͘͠ΕΔίϚϯυ
    w KBWBD
    w +BWBͷίʔυΛίϯύΠϧͯ͘͠ΕΔίϚϯυ
    w KBWBQ
    w ίϯύΠϧͨ͠੒Ռ෺ΛٯΞηϯϒϧͯ͘͠ΕΔίϚϯυ
    

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31. +BWB
    

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32. +BWB
    

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33. ,PUMJO
    

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34. ࠓճ֬ೝͰ͖ͨ఺
    w *OOFSDMBTT͔ΒQSJWBUFpFME΁ΞΫηεͨ࣌͠ʹൃੜ͢Δ߹੒ΞΫηα͕
    ࣗಈੜ੒͞ΕΔ ϝιου͕૿͑ͯ͠·͏
    ໰୊͕ղফ͞Εͨ /FTUNBUFT
    
    w จࣈྻ࿈͕݁಺෦తʹ͸4USJOH#VJMEFSͷBQQFOEͰ͸ͳ͘ɺίΞϥΠϒϥ
    Ϧͷ໋ྩͰॲཧ͞ΕΔΑ͏ʹͳͬͨɻ
    w ,PUMJOͰॻ͍ͯ΋ੜ੒͞ΕΔόΠτίʔυ͸มΘΒͳ͍
    

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35. ·ͱΊ
    w ,PUMJO͸4UZMJTI4IJOZ͕ͩɺੜ੒͞ΕΔCZUFDPEF͸ࠜຊతʹ͸+BWBͰ
    ॻ͍ͯ΋Ұॹͷ΋ͷ͕ग़དྷΔɻ
    w ,PUMJO΋+BWBͱڞʹ੒௕͍ͯ͘͠ɻ
    w "OESPJEͰ+BWB΍͕ಈ͘Α͏ʹͳͬͨͱͯ͠΋͠͹Β͘͸ैདྷͷ
    "OESPJE +BWBPS
    ͱޓ׵ੑΛอͭҝʹEFTVHBS͠ଓ͚Δඞཁ͕͋Δɻ
    w ΑΓྑ͍όΠτίʔυͰΞϓϦΛ഑৴͢ΔͨΊʹ͸௕͍͕͔͔࣌ؒΔ
    w ͍͢͝ൃ໌ͰҰؾʹϏϧυपΓͷվળ͕Ճ଎͢ΔࣄΛظ଴ ଞྗຊئ
    
    

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