Javaのバージョニング問題の話しよっか

2016/01/21(木)に行われた第1回ゆるゆる高専エンジニアLT大会 at FULLER

の発表資料です。

1. Javaͷόʔδϣχϯά໰୊ ͷ࿩͠Α͔ͬ ࣨ੕྄ଠ 2016/01/21(໦)(ୈ1ճ(ΏΔΏΔߴઐΤϯδχΞLTେձ(at(FULLER
2. ಥવͰ͕͢໰୊Ͱ͢
3. ͜ͷΫϥεΛؚΉϥΠϒϥϦ͕͋Γ·͢(core_v1.jar) package com.mrstar.versioning_problem.core; public final class Core { private Core() {} public static String getTitle() { return "΄͛;͕"; } public final static String MESSAGE = "ͽΑͽΑʂ"; }
4. ͖ͬ͞ͷϥΠϒϥϦʹґଘ͢ΔϥΠϒϥϦ͕͋Γ·͢(framework.jar) package com.mrstar.versioning_problem.framework; import com.mrstar.versioning_problem.core.Core; public class Framework { private Framework(){ } public static void showTitle() { System.out.println(Core.getTitle()); } public static void showMessage() { System.out.println(Core.MESSAGE); } }
6. ͜Μͳײ͡Ͱ࢖͍·͢ package com.mrstar; import com.mrstar.versioning_problem.framework.Framework; public class Main { public static void main(String[] args) { Framework.showTitle(); Framework.showMessage(); } }
7. ࣮ߦ͢Δͱɽɽɽ package com.mrstar; import com.mrstar.versioning_problem.framework.Framework; public class Main { public static void main(String[] args) { Framework.showTitle(); // ʮ΄͛;͕ʯͬͯදࣔ͞ΕΔ Framework.showMessage(); // ʮͽΑͽΑʂʯͬͯදࣔ͞ΕΔ } }
8. ͔ͬ͜Β͕ϙΠϯτͰ͢ ΋͏ͪΐͬͱঢ়گઆ໌͕ଓ͖·͢
9. ԾͷจݴΛຊ൪༻ʹมߋ͠ɺόʔδϣϯΞοϓʢcore_v2.jarʣ package com.mrstar.versioning_problem.core; public final class Core { private Core() {} public static String getTitle() { return "ϝΠϯϖʔδ"; //ɹ͖ͬ͞·Ͱʮ΄͛;͕ʯ } // ͖ͬ͞·ͰʮͽΑͽΑʂʯ public final static String MESSAGE = "͜Μʹͪ͸ʂ"; }
11. core_v2.jarʹஔ͖׵͑ͯɺframework.jar͸ͦͷ··Ͱ package com.mrstar; import com.mrstar.versioning_problem.framework.Framework; public class Main { public static void main(String[] args) { Framework.showTitle(); // Q1 ͳΜͯදࣔ͞ΕΔʁ Framework.showMessage(); // Q2 ͳΜͯදࣔ͞ΕΔʁ } }
12. Q1#ʮFramework.showTitle();ʯ • ʮ΄͛;͕ʯͬͯදࣔ͞ΕΔͱࢥ͏ਓʁ • ʮϝΠϯϖʔδʯͬͯදࣔ͞ΕΔͱࢥ͏ਓʁ
13. Q2#ʮFramework.showMessage();ʯ • ʮͽΑͽΑʂʯͬͯදࣔ͞ΕΔͱࢥ͏ਓʁ • ʮ͜Μʹͪ͸ʂʯͬͯදࣔ͞ΕΔͱࢥ͏ਓʁ
14. ౴͑߹Θͤʂ
15. Q1#Framework.showTitle()͸ ʮϝΠϯϖʔδʯͬͯදࣔ͞Ε·͢ ɹ Q2#Framework.showMessage()͸ ʮͽΑͽΑʂʯͬͯදࣔ͞Ε·͢
16. ͋ͬͯͨʁ
17. ղઆʂ
18. framework.jarͷFramework.java(࠶ܝ) package com.mrstar.versioning_problem.framework; import com.mrstar.versioning_problem.core.Core; public class Framework { private Framework(){ } public static void showTitle() { System.out.println(Core.getTitle()); } public static void showMessage() { System.out.println(Core.MESSAGE); } }
19. ͜ΕΛίϯύΠϧͨ݁͠Ռ͕ϙΠϯτʂ framework.jarͷத਎ΛσίϯύΠϧ͢Δͱɽɽɽ
20. σίϯύΠϧͨ͠Framework.class package com.mrstar.versioning_problem.framework; import com.mrstar.versioning_problem.core.Core; public class Framework { private Framework() {} public static void showTitle() { System.out.println(Core.getTitle()); } public static void showMessage() { System.out.println("ͽΑͽΑʂ"); } }
21. ؾ͍ͮͨʁ ΋͏ҰճΈͯΈ·͠ΐ͏ʂ
22. Framework.javaͷίʔυ package com.mrstar.versioning_problem.framework; import com.mrstar.versioning_problem.core.Core; public class Framework { private Framework(){ } public static void showTitle() { System.out.println(Core.getTitle()); } public static void showMessage() { System.out.println(Core.MESSAGE); } }
23. σίϯύΠϧͨ͠Framework.class package com.mrstar.versioning_problem.framework; import com.mrstar.versioning_problem.core.Core; public class Framework { private Framework() {} public static void showTitle() { System.out.println(Core.getTitle()); } public static void showMessage() { System.out.println("ͽΑͽΑʂ"); } }
24. ͓Θ͔Γ͍͚ͨͩ·͔ͨ͠ʁ
25. σίϯύΠϧͨ͠.class Core.MESSAGEͷจࣈྻϦςϥϧͷʮͽΑͽΑʯ ௚઀ຒΊࠐ·Ε͍ͯ·ͨ͠Ͷʂ
26. Core.MESSAGEͷจࣈྻϦςϥϧɺ ௚઀ຒΊࠐ·Ε͍ͯ·ͨ͠Ͷʂ
27. public'sta+c'final'String'MESSAGE'(ུ) ௚઀ຒΊࠐ·Ε͍ͯ·ͨ͠Ͷʂ
28. όʔδϣχϯά໰୊ʂ ༻ޠࣗମ͸C#ͷ΋ͷ
29. public'sta+c'final'int΍public'sta+c'final'String ౳Ϋϥεఆ਺ͷՕॴ͸ίϯύΠϧ͢Δͱ ਺஋ɾจࣈྻϦςϥϧʹల։͞Ε·͢ʂ
30. framework.jar͸ core_v1.jarʹґଘ͠Ϗϧυ͠·ͨ͠ ͦͷޙɺ࠶Ϗϧυ͠·ͤΜͰͨ͠Ͷ
31. framework.jarΛ࠶Ϗϧυ͢Δ·ͰɺFramewarkΫϥε಺ͷ CoreΫϥεͷఆ਺Core.MESSAGEΛ࢖͍ͬͯΔՕॴ͸ core_v1ͷʮͽΑͽΑʯͷ··Ͱ͢
32. ૝૾͍ͯͩ͘͠͞ʂ ੡඼൛ͷϓϩάϥϜͰςετ༻ͷจݴ͕ग़͖ͯͯ͠·͏ͷΛʂ
33. ((((ʀƅДƅ))))
34. ·͊ͿͬͪΌ͚ ϐϤϐϤ ͱ͔ɺ͔Θ͍͍΋ΜͩΑͶ(׼)
35. ʮ͜͜ʹࣹ޾৺ΛδϟϒδϟϒἤΔจݴʯ স͑ͳ͍Ͷ
36. ϙΠϯτ͓͞Β͍ public'sta+c'final'intΈ͍ͨͳఆ਺͸ ίϯύΠϧ͢ΔͱϦςϥϧͱͯ͠ల։͞ΕΔ ※ϓϦϛςΟϒܕͱStringܕ
37. ʮframework.jar࠶Ϗϧυ͢ΓΌΑ͘Ͷʁʯ ·͊ͦ͏ͳΜ͚ͩͲɺJavaॻ͘ͳΒ͜Ε͸஌ͬͱ͍ͯ΄͍͠ ఆ਺͕ຒΊࠐ·ΕͯࢥΘ͵όάͷݪҼʹͳΔ͔Βʂ
38. ஗͘ͳΓ·͕ͨࣗ͠ݾ঺հ • ࣨ੕྄ଠ • ࠷ॳ͸JavaͰAndroid+(2016೥Ͱ΋Java6+orz) • ࠷ۙ·ͰC#ͰUnity+(2016೥Ͱ΋C#3.0(Ұ෦4.0)+orz) • ࠓ͸TypeScriptͰNode.js+(JavaScriptΉ͍ͣͶ)
39. ʮόʔδϣχϯά໰୊ɺكͳέʔεͳΜͰ͠ΐʁʯ
40. Θͨ͠΋ͦ͏ࢥ͍ͬͯͨ࣌ظ͕͋Γ·ͨ͠ɻ
41. ڈ೥ૺ۰͠·ͨ͠ Unity&+&Android&+&͋Δ޿ࠂSDKͰ
42. ·ͨ·ͨ໰୊Ͱ͢ʂ ࠓ౓͸Androidܦݧऀ͕ର৅
43. AndroidͰpublic,sta0c,final,int ͳΑ͘࢖͏΍ͭͬͯͳʙΜͩʂʁ
44. RΫϥε
45. R.layout.activity_mainͷΑ͏ͳϦιʔεID ϨΠΞ΢τ΍ը૾ʹৼΒΕΔϦιʔεID(intͳఆ਺) RΫϥεͷύοέʔδ໊͸ΞϓϦͷύοέʔδ໊ʹ
46. RΫϥεͷϦιʔεIDར༻ྫ public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // ͜ΕʂʂʂϏϧυ͢Δͱ੔਺Ϧςϥϧʹ setContentView(R.layout.activity_main); } }
47. Unity&+&Android&+&͋Δ޿ࠂSDKͰ όʔδϣχϯά໰୊͕ݪҼͷෆ۩߹ʹૺ۰ʂ
48. Unity+Android+͋Δ޿ࠂSDKͷߏ੒ྫ ͜Ε͸Unity4·Ͱͷ΍ΓํͰݱࡏ͸ඇਪ঑
50. ϨΠΞ΢τͷXML΍ը૾ͳͲͷϦιʔε ্هϦιʔεΛ࢖͏޿ࠂදࣔػೳͷjar (AndroidManifest.xml)
51. jarͷதͷΫϥεͰ͸ɺR.layout.activity_main Έ͍ͨͳϦιʔεIDͷఆ਺ɺϦςϥϧͱͯ͠ల։͞ΕͯΔΑͶʂ
52. Unity͸Ϗϧυ࣌ɺAndroidͷΞϓϦΛ࡞ΔͨΊ ৽ͨʹAndroidϓϩδΣΫτΛ࡞ͬͯ ͜ͷλΠϛϯάͰϦιʔεʹ࠶౓ϦιʔεID͕ৼΒΕ·͢
54. jarͷதͷΫϥεͰ͸ɺR.layout.activity_main Έ͍ͨͳϦιʔεIDͷఆ਺ɺϦςϥϧͱͯ͠ల։͞ΕͯΔΑͶʂ
55. ΋͠
56. ϓϥάΠϯ͕ೋͭʹͳͬͨΒ
58. ϓϥάΠϯ͕ೋͭʹͳͬͨΒ
59. ͜ͷঢ়ଶͰAndroidϓϩδΣΫτΛ࡞Γ ϦιʔεIDΛৼΓ௚ͨ͠Β
60. ϓϥάΠϯͷJarͷதͷ੔਺Ϧςϥϧͱ Unity͕৽ͨʹ࡞ΔϦιʔεIDͷ੔਺͕ ͣΕΔʂ
61. ࣮ߦ࣌Τϥʔʂ
62. λν͕ѱ͍
63. public'sta+c'final'int͕ϕλॻ͖͞Εͨ jarΛ࡞ͬͨSDK։ൃऀ͕ѱ͍ʂ jarͷதͷϦιʔεIDͱUnity͕࡞ΔAndroidϓϩδΣΫτͷϦιʔεIDͱ͕Ұக͠ͳ͍ʂ
64. ࠷ѱɺඇৗʹΪϧςΟ
65. ͯͯ͞͞ɺ όʔδϣχϯά໰୊ ཧղͯ͠΋Β͑·͔ͨ͠ʁ
66. ΈΜͳόʔδϣχϯά໰୊Λ Ҿ͖ىͦ͜͠͏ͳϥΠϒϥϦ ࡞ͬͪΌ͍͚·ͤΜΑʂ
67. ໿ଋͳʂ
68. Javaͷόʔδϣχϯά໰୊ͷ࿩͠Α͔ͬ ɹ ࣨ੕྄ଠ 2016/01/21(໦)(ୈ1ճ(ΏΔΏΔߴઐΤϯδχΞLTେձ(at(FULLER