androidアプリを作る第1・2回

1.

"OESPJEΞϓϦΛ࡞Δ ,.$OPOZMFOF ɾ֓࿦ɾηοτΞοϓɾ+BWB લ൒

2.

ࣗݾ঺հ w OPOZMFOF ͷʹΕΜ w ,.$ճ w ΧʔϏΟͰ͢ w
͋ͭΊͯΧʔϏΟྑ͍Ͱ͢

3.

ࣗݾ঺հ w OPOZMFOF ͷʹΕΜ w εϚϗΞϓϦͱ͔ w 5XJUUFS(JU)VCFUD w
IUUQOPOZMFOFIBUFOBCMPHKQ

4.

͜ͷεϥΠυ w ॳΊͷि෼Λ·ͱΊͨ΋ͷ

5.

ࠓ೔΍Δ͜ͱ "OESPJE֓࿦ ؀ڥηοτΞοϓ IFMMPXPSME +BWB લ൒

6.

"OESPJE  ֓࿦

7.

"OESPJE ͱ͸

8.

"OESPJEͱ͸ w (PPHMF͕։ൃ͍ͯ͠Δ04 w Φʔϓϯιʔε w εϚʔτϑΥϯɺλϒϨοτ޲͚ w ࠷৽͸ /PVHBU

9.

"OESPJEͱ͸ w ಛ௃ w ແྉʢಛڐྉআ͘ʣ w ͍ΖΜͳϝʔΧʔ w 9QFSJB 40/:
(BMBYZ 4BNTVOH /FYVT (PPHMFͷ0&. )5$ FUD w ൺֱతࣗ༝౓͕ߴ͍ʢεϚʔτϑΥϯͷதͰ͸ʣ

10.

ଞͷ04 w J04 w ೔ຊͰ͸γΣΞͰ͔͍ w BOESPJEͷӬԕͷϥΠόϧ

11.

ଞͷ04 w 8JOEPXT1IPOF w /0,*"ͱ)5$͙Β͍ʜ w ͱࢥͬͨΒ࠷ۙ೔ຊͰ࡞ΒΕͯΔ w 7"*01IPOF."%04."FUD

12.

"OESPJE։ൃ w جຊແྉ w Φʔϓϯιʔε w *%& "OESPJE4UVEJP w
ΤϛϡϨʔλ w 1MBZ4UPSFʹެ։͢Δࡍ͸L

13.

"OESPJE ͷ಺ଆ

14.

"OESPJEͷ಺෦ w -JOVYΧʔωϧΛ࠾༻ w TIFMMʹೖΔͱίϚϯυ࢖͑Δ w ಺෦͸Φʔϓϯιʔε w IUUQTBOESPJEHPPHMFTPVSDFDPN

15.

"OESPJEΞϓϦ͕ಈ͘·Ͱ w KBWBϑΝΠϧ͔ΒKBWBDͰDMBTTϑΝΠϧ w KBWBͷόΠτίʔυ w DMBTTϑΝΠϧ͔ΒEYͰEFYϑΝΠϧ w EBMWJLͷόΠτίʔυ .java
.class .dex javac dx

16.

"OESPJEΞϓϦ͕ಈ͘·Ͱ w %BMWJL7. w +7.Ͱ͸ͳ͍ w d"OESPJE w "35 "OESPJE3VOUJNF
w EFYΛ༧ΊίϯύΠϧͳͲˠૣ͍ʂྑ͍ʂ w "OESPJEd

17.

None

18.

"OESPJE ͷ։ൃ

19.

։ൃ؀ڥ w +BWB w ਖ਼֬ʹ͸"OESPJE+BWB w "OESPJE/͔Β͸0QFO+%,KBWB

20.

։ൃ؀ڥ w "OESPJE4UVEJP w *OUFMMJ+ϕʔε w 8JOEPXTNBD-JOVY w ແྉ w
FDMJQTF͸αϙʔτऴྃ

21.

04όʔδϣϯ w ݹ͍όʔδϣϯ͕ݱ໾ w ࠷৽ͷ"1*͕࢖͑ͳ͍౳ w Ҏ্ఔ౓͕Φεεϝ ˞ӈͷද͸൒೥લ

22.

υΩϡϝϯτ w IUUQTEFWFMPQFSBOESPJEDPNJOEFYIUNM

23.

؀ڥ  ηοτΞοϓ

24.

ηοτΞοϓ 1$ηοτΞοϓ ิ଍ ୺຤ଆηοτΞοϓ )FMMP8PSME

25.

1$ηοτΞοϓ w "OESPJE4UVEJPೖΕΔ͚ͩ w ΑΓ0QFO+%,ಉࠝ w "OESPJEͷ4%,ಉࠝ w IUUQTEFWFMPQFSBOESPJEDPNTUVEJP JOEFYIUNM

26.

ิ଍

27.

ηοτΞοϓ ਪ঑ w (FOZNPUJPO w ૉૣ͍ΤϛϡϨʔλ w ඇ঎༻Ͱ͸ແྉ w 7JSUVBM#PY͕ඞཁ
w IUUQTXXXHFOZNPUJPODPNGVO[POF

28.

ηοτΞοϓ ਪ঑ w "%#Λ1"5)ʹ௥Ճ w "OESPJEΛ1$͔Βૢ࡞͢Δπʔϧ w *OTUBMMVOJOTUBMMFUD w ίϯιʔϧ͔ΒBEC͕࢖͑ΔΑ͏ʹ

29.

୺຤ଆ  ηοτΞοϓ

30.

64#σόοά w ։ൃऀ޲͚ͷϞʔυ w BECίϚϯυΛୟ͚ΔΑ͏ʹͳΔ w 1$͔Β"OESPJEΛૢ࡞͢Δ w ΤϛϡϨʔλͰ͸0/ʹͳ͍ͬͯΔ͸ͣ

31.

64#σόοά༗ޮ ઃఆΛ։͘

32.

64#σόοά༗ޮ ୺຤৘ใΛ։͘

33.

64#σόοά༗ޮ Ϗϧυ൪߸Λ࿈ଧ

34.

64#σόοά༗ޮ Ϗϧυ൪߸Λ࿈ଧ

35.

None

36.

64#σόοά༗ޮ b։ൃऀ޲͚Φϓγϣϯ`ొ৔

37.

64#σόοά༗ޮ 64#σόοάΛ0/

38.

1$ʹ઀ଓ w ୺຤ʹ"%#ڐՄը໘͕ग़ͨΒڐՄ w υϥΠόͷ֤ʑ͕ඞཁ͔΋

39.

)FMMP8PSME

40.

)FMMP8PSMEͷྲྀΕ w ϓϩδΣΫτΛ࡞੒͢Δ w ίϯύΠϧ࣮ͯ͠ߦ w )FMMP8PSME

41.

ϓϩδΣΫτͷ࡞੒ w l4UBSUBOFX"OESPJE4UVEJPQSPKFDUz

42.

ϓϩδΣΫτͷ࡞੒ w )FMMP8PSMEΞϓϦ w $PNQBOZ%PNBJO͸ద౰ʹ ྫKQLND

43.

ϓϩδΣΫτͷ࡞੒ w 1IPOFBOE5BCMFU"OESPJEҎ্

44.

ϓϩδΣΫτͷ࡞੒ w &NQUZ"DUJWJUZΛબ୒

45.

ϓϩδΣΫτͷ࡞੒ w ͦͷ··pOJTI͠͹Β͘଴ͭ

46.

ϓϩδΣΫτͷ࡞੒

47.

"OESPJE4UVEJPઃఆ w *OTUBOU3VOΛEJTBCMF w ϗοτεϫοϓʹΑΓߴ଎ʹมߋΛద༻͢Δػೳ w ·ͩ͸·Δ͜ͱ͕ଟ͍ͷͰEJTBCMF

48.

"OESPJE4UVEJPઃఆ w ઃఆ#VJME*OTUBOU3VOΛEJTBCMF

49.

)FMMP8PSME w 3VObBQQ`ΛΫϦοΫ

50.

)FMMP8PSME w ΠϯετʔϧઌΛબ୒ ઀ଓதͷσόΠε

51.

)FMMP8PSME w ΠϯετʔϧઌΛબ୒ ΤϛϡϨʔλ

52.

)FMMP8PSME w ิ଍ w (FOZNPUJPOͷਓ͸ࣗ෼Ͱىಈͤ͞Δ w ϓϥάΠϯ΋͋Γ·͢ w *OUFM)"9.ͷΠϯετʔϧΛٻΊΒΕΔ͜ͱ΋ w
ը໘ʹैͬͯΠϯετʔϧ

53.

)FMMP8PSME

54.

ηοτΞοϓ׬ྃ w ͓ർΕ༷Ͱͨ͠

55.

+BWB

56.

+BWB +BWBʹ͍ͭͯ Ϋϥεͱ͸ จ๏ ͦͷଞ͍Ζ͍Ζ

57.

+BWB֓ཁ

58.

+BWB֓ཁ w "OESPJE+BWBͰ͸ͳ͘+BWBͷ֓ཁ

59.

+BWBͱ͸ w ΦϒδΣΫτࢦ޲ϓϩάϥϛϯάݴޠ w 4VO͕։ൃɺݱࡏ͸0SBDMF w ࠷৽όʔδϣϯ͸+BWB4& w ϥϜμࣜͷαϙʔτ౳

60.

+BWBͱ͸ w +7. +BWB7JSUVBM.BDIJOF w +BWBͷ࣮ߦ؀ڥ w KBWBDͰίϯύΠϧ͞ΕͨόΠτίʔυΛ࣮ߦ w
04ͷґଘੑΛऔΓআ͘ w l8SJUFPODF SVOBOZXIFSFz

61.

+BWBͱ͸ w KBWBϑΝΠϧΛKBWBDͰίϯύΠϧ w όΠτίʔυ DMBTTϑΝΠϧ ͷੜ੒

62.

+BWBͱ͸ w όΠτίʔυΛ֤؀ڥͷ+7.Ͱ࣮ߦ ˞"OESPJE͸όΠτίʔυΛ௚઀࣮ߦ͠ͳ͍

63.

ิ଍ w +BWBͱ+BWB4DSJQU͸શ͘ҧ͏΋ͷ w +BWB͕ྲྀߦ͔ͬͯͨΒࣅ໊ͨલʹͳ͚ͬͨͩ ʺ

64.

ิ଍ w "OESPJE͸͍ΘΏΔʮ+BWB΋Ͳ͖ʯ w ίʔυΛॻ͘෼ʹ͸+BWBͱΈͳͯ͠ྑ͍ w ৄࡉIUUQRVFTFSBIBUFOBCMPHKQFOUSZ

65.

  )FMMP8PSME

66.

8JOEPXTͰͷ+BWB w λʔϛφϧ্Ͱ+BWB+BWBDΛಈ͔͢৔߹ w +%,ΛΠϯετʔϧ͢Δ w IUUQXXXKBWBESJWFKQJOTUBMM w "OESPJE4UVEJPಉࠝͷ+%,Λ࢖͏ •
C:\Program Files\Android\Android Studio\jre\bin\java.exe

67.

w ͱΓ͋͑ͣ)FMMP8PSME • Hello.java )FMMP8PSME public class Hello { public
static void main(String[] args) { System.out.println("Hello, world!"); } }

68.

)FMMP8PSME $ javac Hello.java $ ls > Hello.class Hello.java $
java Hello > Hello, world! ˡίϯύΠϧ

69.

)FMMP8PSME $ javac Hello.java $ ls > Hello.class He… $
java Hello > Hello, world! ˡόΠτίʔυ

70.

)FMMP8PSME $ javac Hello.java $ ls > Hello.class Hello.java $
java Hello > Hello, world! ˡ࣮ߦ

71.

ͬ͘͟Γઆ໌

72.

• Hello.java • Hello Ϋϥεͷએݴ )FMMP8PSME public class Hello {
public static void main(String[] args) { System.out.println("Hello, world!"); } }

73.

• Hello.java • main ϝιου(≒ؔ਺)ͷએݴ )FMMP8PSME public class Hello {

74.

• Hello.java • System.out.println ϝιουΛݺͼग़͠ )FMMP8PSME public class Hello {

75.

public class Hello { public static void main(String[] args) {
String hello = "Hello, world!”; System.out.println(hello); } } • Hello.java • hello ม਺ Λ࡞੒ )FMMP8PSME

76.

Ϋϥε

77.

˞࣮༻ੑ  ͔Βͷઆ໌

78.

Ϋϥεͱ͸ʁ w 㲈ܕ KBWBͷ৔߹ w ॲཧ΍ม਺Λͻͱ·ͱΊʹͨ͠΋ͷ w େ఍ɺػೳຖʹΫϥεΛ࡞Δ

79.

Ϋϥεͷ͍͍ͱ͜Ζ w ୔ࢁม਺࣋ͪӡͿͷͭΒ͍ͷͰΫϥεͰҰؾʹ w ϝιου୔ࢁॻ͘ͷͭΒ͍ͷͰΫϥεʹ·ͱΊΔ w ΫϥεʹೖΕͨม਺ͷॲཧ͸ΫϥεͷதͰ w 4USJOH΍JOU͚ͩͩͱม਺͕Կҙຯͯ͠Δ͔෼͔Β ͳ͍ͷͰΫϥεʹ

80.

ྫ w ͱΓ͋͑ͣ w 4USJOH จࣈྻ w JOU ਺ࣈ
w ͚ͩΛ࢖͏ঢ়گ

81.

ྫ w ອըΛ؅ཧ͍ͨ͠ w ອըͷऔಘɾએ఻༻จॻ࡞੒ɾFUDʜ

82.

public class Hello { … public static void printManga( String
title, String author, String company, String bland, String volumeName, int price, String description, String obi) { System.out.println(author + "ͷ" + title + volumeName + "! " + company + bland + “ࣾӡΛ͔͚ͨ௒େ࡞!: \n આ໌͸ͪ͜Β” + description + obi + “஋ஈ͸” + price); } } એ఻༻จॻΛ࡞੒͢ΔϝιουΛ࡞Δ

83.

public class Hello { … public static void printManga( String
title, String author, String company, String bland, String volumeName, int price, String description, String obi) { System.out.println(author + "ͷ" + title + volumeName + "! " + company + bland + “ࣾӡΛ͔͚ͨ௒େ࡞!: \n આ໌͸ͪ͜Β” + description + obi + “஋ஈ͸” + price); } } એ఻༻จॻΛ࡞੒͢ΔϝιουΛ࡞Δ ˡඞཁͳม਺ୡ

84.

public class Hello { … public static String getTitleFromServer(Server server)
{ server.getTitle().trim() } public static String getAuthorFromServer(Server server) { server.getAuthor().trim() } publ... } ອըσʔλΛαʔόʔ͔Β࣋ͬͯདྷΔ ˢ4USJOHҰͭͣͭஸೡʹฦ͢ϝιουΛ࡞Δ

85.

// server ͸ͳ͍͚Ͳઆ໌ͷͨΊ String title = getTitleFromServer(server); String author = getAuthorFromServer(server); Str… printManga(title, author, compa…); } ... } αʔόʔ͔Β͖࣋ͬͯͨ΋ͷΛએ఻༻จॻʹ͢Δ ˢม਺ΛҰͭҰͭऔಘ

86.

// server ͸ͳ͍͚Ͳઆ໌ͷͨΊ String title = getTitleFromServer(server); String author = getAuthorFromServer(server); Str… printManga(title, author, compa…); } ... } αʔόʔ͔Β͖࣋ͬͯͨ΋ͷΛએ఻༻จॻʹ͢Δ ˢม਺ΛҰͭҰͭϝιουʹೖΕ͍ͯ͘

87.

String title = getTitleFromServer(server); String author = getAuthorFromServer(server); Str… printManga(title, author, compa…); } public static void printManga( String title, String author, String company, String bland, String volumeName, int price, String description, String obi) { System.out.println(author + "ͷ" + title + volumeName + "! " + company + bland + “ࣾӡ Λ͔͚ͨ௒େ࡞!: \n આ໌͸ͪ͜Β” + description + obi + “஋ஈ͸” + price); } public static String getTitleFromServer(Server server) { server.getTitle() } public static String getAuthorFromServer(Server server) { server.getAuthor() } pub… ... } ·ͱΊΔ

88.

ཁ݅௥Ճ w ʮҧ͏એ఻จষ΋ग़ͯ͠΄͍͠ΜͩΑͶʯ

89.

public class Hello { … public static void printMangaShort( String
title, //String author, //String company, //String bland, //String volumeName, int price, //String description, //String obi ) { System.out.println(titile + " Ձ֨: " + price); } } ୹͍એ఻จষͷ௥Ճ ˡཁΒͳ͍΋ͷ͸  ίϝϯτΞ΢τ

90.

String title = getTitleFromServer(server); String author = getAuthorFromServer(server); Str… printManga(title, author, compa…); printMangaShort(title, price); } public static void printManga( String title, String author, String company, String bland, String volumeName, int price, String description, String obi) { System.out.println(author + "ͷ" + title + volumeName + "! " + company + bland + “ࣾӡΛ͔͚ͨ௒େ࡞!: \n આ໌͸ͪ͜Β” + description + obi + “஋ஈ͸” + price); } public static String getTitleFromServer(Server server) { server.getTitle() } public static String getAuthorFromServer(Server server) { server.getAuthor() } pub… public static void printMangaShort( String title, //String author, //String company, //String bland, //String volumeName, int price, //String description, //String obi ) { System.out.println(titile + " Ձ֨: " + price); } } ·ͱΊΔ

91.

ཁ݅௥Ճ w ʮ͋ɺ͋ͱॳΊ͔Β͙ͭΒ͍ອըஔ͍ͯͯ ΄͍͠ʯ

92.

String manga1Title = "ΏΔΏΓ"; String manga1Author = "ͳ΋Γ"; Str... String manga2Title = "ΏΏࣜ"; String manga2Author = "ࡾ্খຢ"; Str... printManga(manga1Title, manga1Author, ... ); printMangaShort(manga1Title, manga1Price); printManga(manga2Title, manga2Author, ... ); ॳظອը௥Ճ ˡ֤ม਺௥Ճ

93.

String manga1Title = "ΏΔΏΓ"; String manga1Author = "ͳ΋Γ"; Str... String manga2Title = "ΏΏࣜ"; String manga2Author = "ࡾ্খຢ"; Str... printManga(manga1Title, manga1Author, ... ); printMangaShort(manga1Title, manga1Price); printManga(manga2Title, manga2Author, ... ); ॳظອը௥Ճ ˡQSJOU

94.

̷̸̴ʙ͇̓̈́ w զʑ͸Կߦ͜ͷϑΝΠϧΛॻ͍͍ͯ͘ͷ͔ w ॳΊͷອը͕ͭ૿͑ͨΒߦ૿͑Δ w ϝιουͷҾ਺Λຖճॻ͍͍ͯ͘ͷ͔ w ອըͷཁૉ૿͑ͨΒͲ͏͢Δͷ͔ w
ग़൛೥ച্ײ૝FUD

95.

͜͜ͰΫϥεͷొ৔ w ࠓճ͸Manga ΫϥεΛఆٛ͢Δ

96.

* Manga.java public class Manga { private String title; private
String author; private String company; private String bland; private String volumeName; private int price; private String description; private String obi; public Manga(String title, String author, String company, String bland, String volumeName, int price, String description, String obi) { this.title = title; this.author = author; this.company = company; this.bland = bland; this.volumeName = volumeName; this.price = price; this.description = description; this.obi = obi; } } ˡ֤ม਺ʢϝϯόม਺ʣ

97.

String author; private String company; private String bland; private String volumeName; private int price; private String description; private String obi; public Manga(String title, String author, String company, String bland, String volumeName, int price, String description, String obi) { this.title = title; this.author = author; this.company = company; this.bland = bland; this.volumeName = volumeName; this.price = price; this.description = description; this.obi = obi; } } ˣੜ੒ɾॳظԽʢίϯετϥΫλʣ

98.

String author; private String company; private String bland; private String volumeName; private int price; private String description; private String obi; public Manga(String title, String author, String company, String bland, String volumeName, int price, String description, String obi) { this.title = title; this.author = author; this.company = company; this.bland = bland; this.volumeName = volumeName; this.price = price; this.description = description; this.obi = obi; } } ˡϝϯόม਺  ʹ୅ೖ

99.

public class Manga { … public void print() { System.out.println(author
+ "ͷ" + title + volumeName + "! " + company + bland + “ࣾӡΛ͔͚ͨ௒େ࡞!: \n આ໌͸ͪ͜Β” + description + obi + “஋ஈ͸” + price); } public void printShort() { System.out.println(titile + " Ձ֨: " + price); } } ˣΫϥε಺ͷม਺ΛಡΜͰprint

100.

w ͜ΕΛHelloΫϥε಺Ͱ࢖͏ w MangaΦϒδΣΫτΛ࡞੒͠ɺϝιουΛݺͿ w Ϋϥεఆٛʢઃܭਤʣ w ΦϒδΣΫτ࣮ࡍͷσʔλ .BOHBΫϥε׬੒

101.

Manga yuruyuri = new Manga("ΏΔΏΓ", "ͳ΋Γ", ...); Manga yuyushiki = new Manga("ΏΏࣜ", "ࡾ্খຢ", ...); yuruyuri.print(); yuruyuri.printShort(); yuyushiki.print(); yuyushiki.printShort(); // server ͳΜͯ΋ͷ͸ͳ͍͚Ͳઆ໌ͷͨΊ Manga manga = server.getManga(); manga.print(); manga.printShort(); } } ˢMangaΦϒδΣΫτΛ ࡞੒ɾॳظԽ

102.

Manga yuruyuri = new Manga("ΏΔΏΓ", "ͳ΋Γ", ...); Manga yuyushiki = new Manga("ΏΏࣜ", "ࡾ্খຢ", ...); yuruyuri.print(); yuruyuri.printShort(); yuyushiki.print(); yuyushiki.printShort(); // server ͳΜͯ΋ͷ͸ͳ͍͚Ͳઆ໌ͷͨΊ Manga manga = server.getManga(); manga.print(); manga.printShort(); } } ˢMangaΦϒδΣΫτ

103.

Manga yuruyuri = new Manga("ΏΔΏΓ", "ͳ΋Γ", ...); Manga yuyushiki = new Manga("ΏΏࣜ", "ࡾ্খຢ", ...); yuruyuri.print(); yuruyuri.printShort(); yuyushiki.print(); yuyushiki.printShort(); // server ͳΜͯ΋ͷ͸ͳ͍͚Ͳઆ໌ͷͨΊ Manga manga = server.getManga(); manga.print(); manga.printShort(); } } ˡMangaΫϥεʹఆٛ͞Εͨ ϝιουΛݺͿ

104.

Manga yuruyuri = new Manga("ΏΔΏΓ", "ͳ΋Γ", ...); Manga yuyushiki = new Manga("ΏΏࣜ", "ࡾ্খຢ", ...); yuruyuri.print(); yuruyuri.printShort(); yuyushiki.print(); yuyushiki.printShort(); // server ͳΜͯ΋ͷ͸ͳ͍͚Ͳઆ໌ͷͨΊ Manga manga = server.getManga(); manga.print(); manga.printShort(); } } ˡMangaΫϥεʹఆٛ͞Εͨ ϝιουΛݺͿ

105.

Manga yuruyuri = new Manga("ΏΔΏΓ", "ͳ΋Γ", ...); Manga yuyushiki = new Manga("ΏΏࣜ", "ࡾ্খຢ", ...); yuruyuri.print(); yuruyuri.printShort(); yuyushiki.print(); yuyushiki.printShort(); // server ͳΜͯ΋ͷ͸ͳ͍͚Ͳઆ໌ͷͨΊ Manga manga = server.getManga(); manga.print(); manga.printShort(); } } ˢMangaΦϒδΣΫτ͝ͱ  αʔόʔ͔Βऔಘ ˞serverͰ͸MangaΦϒδΣΫτΛ࡞ͬͯฦ͢ॲཧΛॻ͍͍ͯΔͱ͢Δ

106.

ศར w HelloΫϥεͰ͸MangaΫϥεͷϝιου Λݺͼग़͚ͩ͢ w Mangaͷཁૉ͕૿͑ͯ΋Manga಺Λ  มߋ͢Ε͹ྑ͍ w Mangaͷ಺෦ͷม਺͸Hello͸஌Βͳ͍

107.

ศར w Ξχϝ#%Λ؅ཧ͢Δ͜ͱʹͳͬͯ΋ʜ w AnimeBDΫϥεΛ࡞Δ w HelloΫϥε಺ͰAnimeBDΦϒδΣΫτΛ࡞੒ w ΦϒδΣΫτͷϝιουΛୟ͘

108.

KBWBͰ͸ w Ұ෦Λআ͍ͯશͯΦϒδΣΫτͰߏ੒ w int / char / boolean ͳͲϓϦϛςΟϒܕͭҎ֎
w จࣈྻ String ΋ΦϒδΣΫτ      ˠΦϒδΣΫτࢦ޲ 001 ݴޠ String k = "KMC"; k.length(); k.replace("K", "O");

109.

ͱΓ͋͑ͣ w ॻ͍ͯͨΒͳΜͱͳ͘෼͔ͬͯ͘Δ w ͜͏͍͏ͷ͕ඞཁͳΜͩͳ͋ఔ౓Ͱ0,

110.

จ๏

111.

͔͜͜Β͸HJTU IUUQTHJTUHJUIVCDPNOPOZMFOF FBGGFGBGDFFBC

androidアプリを作る 第1・2回

androidアプリを作る 第1・2回

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androidアプリを作る第1・2回

androidアプリを作る第1・2回