w ܕਪ w ιʔείʔυશͯͷมͷํΛ໌ࣔతʹॻ͘ඞཁ͕ͳ͍ w จ຺͔ΒมͷํΛࣗಈతʹܾఆ͠ɺܕͷએݴΛলུ͢Δ val x = 1 มΛܕͰॳظԽ͍ͯ͠Δˠ*OUܕͰ͋Δͱஅ͞ΕΔ val x = "Hello World!" มΛจࣈྻܕͰॳظԽ͍ͯ͠Δˠ4USJOHܕͰ͋Δͱஅ͞ΕΔ ಛ
׆༂ͷ w .PCJMF w "OESPJE w ,PUMJO/BUJWF w IUUQTLPUMJOMBOHPSHEPDTSFGFSFODFOBUJWFPWFSWJFXIUNM w 8FC w ,PUMJOGPS+BWB4DSJQU w 4FSWFS4JEF w 4QSJOH'SBNFXPSL w IUUQTTQSJOHJPCMPHJOUSPEVDJOHLPUMJOTVQQPSUJOTQSJOHGSBNFXPSL
ֶशํ๏ w ॻ੶ w ,PUMJOೖ·Ͱͷॿಡຊ w ,PUMJOελʔτϒοΫ w ,PUMJOΠϯΞΫγϣϯ w 8FC w ,PUMJO,PBOT w IUUQTLPUMJOMBOHPSHEPDTUVUPSJBMTLPBOTIUNM w υοτΠϯετʔϧ w [email protected]
·ͱΊ w ,PUMJOɺ+FU#SBJOT͕։ൃͨ͠+7.ݴޠ w ʮ+BWBΑΓ҆શɾ؆ܿʹʯॻ͘͜ͱΛతͱ͍ͯ͠Δ w ੩తܕ͚ΦϒδΣΫτࢦݴޠ w /VMM҆શܕਪ w +BWBΤϯδχΞଞ+7.ݴޠܦݧऀ͕࢝Ί͍͢ w Φʔϓϯιʔε w .PCJMFͷଞʹɺ8FC4FSWFS4JEFͰ׆༂
ม val name = "shinohara" val age = 27 w +BWBͷมએݴͩͱɺ࢝ΊʹܕΛॻ͘ͱ͜Ζ͔Β࢝·Δ w ,PUMJOͰଟ͘ͷมએݴͰܕΛলུͰ͖Δ val name: String = "shinohara" val age: Int = 27 w ඞཁͰ͋Εɺ໌ࣔతʹܕΛࢦఆ͢Δ͜ͱͰ͖Δ
ίϨΫγϣϯ w ͷίϯςφͱͳΔΦϒδΣΫτΛʮίϨΫγϣϯʯͱݺͿ w ϦετηοτϚοϓ w ͜͜ͰɺϦετΛྫʹڍ͛ͯઆ໌ w ͷϦετΦϒδΣΫτΛఆٛͯ͠αΠζͱ൪ͷཁૉΛग़ྗͯ͠ΈΔ fun main(args: Array) { val ints: List = listOf(1, 2, 3) println(ints.size) println(ints[0]) }
JGFMTF w ,PUMJOͷJGࣜͰ͋ΓɺจͰͳ͍ w จͱࣜͷҧ͍ w ࣜɺผͷࣜͷҰ෦ͱͯ͠༻Ͱ͖ΔΛ࣋ͭ w จɺϒϩοΫͰғ·ΕͨτοϓϨϕϧͷཁૉͰ͋Γɺ ͦΕࣗΛ࣋ͨͳ͍ fun main(args: Array) { val score = 80 val message = if (score >= 60) "success" else "failure" println(message) }
XIFO w +BWBʹ͓͚ΔTXJUDIจΛڧྗʹͨࣜ͠ w ذ݅ʹఆҎ֎ͷࢦఆ͕Ͱ͖Δ w ʮOVNCFS͕ͷͱ͖ʯͷ݅ذΛXIFOͰ࡞ͬͯΈΔ fun main(args: Array) { val number = 1 when (number) { 1 -> println("number is one.") 2, 3 -> println("number is two or three.") else -> println("unknown.") } }
GPS w ϦετͷதΛͯ͢QSJOUͯ͠ΈΔ fun main(args: Array) { val colors = listOf("red", "green", "blue") for (color in colors) { println(color) } } ܁Γฦ͠ՄೳͳΦϒδΣΫτͷ ཁૉΛॱ൪ʹऔΓग़͢
GPSϨϯδ w Ϩϯδ w ൣғΛද͢ΦϒδΣΫτ w ʮdʯΛද͢ΦϒδΣΫτʮʯͱදݱͰ͖Δ w GPSͱϨϯδΛΈ߹Θͤͯɺҙͷൣғʹରͯ͠ॱ൪ʹΞΫηεͰ͖Δ w ͔Β·ͰͷΛͯͯ͢͠QSJOUͯ͠ΈΔ fun main(args: Array) { var sum = 0 for (i in 1..10) { sum += i } println(sum) }
·ͱΊ w ༷ʑͳΦϒδΣΫτ w ྻ w ϦετηοτϚοϓ w ϛϡʔλϒϧΠϛϡʔλϒϧΛ͍͚Δ w ݅ذ w ,PUMJOͷJGࣜ w ෳࡶͳJGFMTFXIFOΛ׆༻ͯ͠ΈΔ w ܁Γฦ͠ w GPSΛͬͯ܁Γฦ͠ՄೳͳΦϒδΣΫτͷཁૉʹॱ൪ʹΞΫηεͰ͖Δ w Ϩϯδ YZ Ͱൣғࢦఆͨ͠ΦϒδΣΫτΛੜͯ͠ॱ൪ʹΞΫηεͰ͖Δ
fun main(args: Array) { for (i in 1..100) { when { i % 15 == 0 -> println("FizzBuzz") i % 3 == 0 -> println("Fizz") i % 5 == 0 -> println("Buzz") else -> println(i) } } } 'J[[#V[[
w ʮTRVBSFʯ w Ҿͱͯ͠༩͑ΒΕͨΛͯ͠ฦ͢ w ʮNBYʯ w Ҿͱͯ͠༩͑ΒΕͨͭͷͷ͏ͪɺେ͖͍ํΛฦ͢ w ʮJT&WFOʯ w Ҿͱͯ͠༩͑ΒΕ͕ͨۮͷ߹USVFΛɺحͷ߹GBMTFΛฦ͢ w ʮGBDUPSJDBMʯ w Ҿͱͯ͠༩͑ΒΕͨͷ֊Λฦ͢ w ྫ ͷ֊ w ʮJT$POUBJOT5ISFFʯ w Ҿͱͯ͠༩͑ΒΕͨϦετʹʮʯؚ͕·ΕΔ͔Ͳ͏͔Λ#PPMFBOͰฦ͢ ͍Ζ͍ΖͳؔΛ࡞ͬͯΈΔ
Ϋϥε class Person(val name: String) val person: Person = Person("shinohara") fun main(args: Array) { println(person.name) // shinohara } ϓϥΠϚϦίϯετϥΫλͱҾ
Ϋϥεͱϝιου class Person(val name: String) { fun introduceMyself() { println("I am ${name}”) } } val person: Person = Person("shinohara") fun main(args: Array) { person.introduceMyself() // I am shinohara }
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