Multiplatform Projectsの向かう先 #m3kt

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1. 5 / 8
   # 2013
   

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2. 
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3. 
   # 1/02
   

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4. 
   
   
   
   # 2013 / /
   

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5. !
   # 1/02
   fun main(args: Array) {
   println("Hello world!")
   }
   

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6. 
   kotlin.io.readLine000 JVM 58
   # 3126 / /
   fun main(args: Array) {
   val name = readLine()
   println("Hello $name!")
   }
   

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7. # 2013 / /
   import java.io.BufferedReader
   import java.io.File
   fun main(args: Array) {
   val name = File("name.txt")
   .bufferedReader()
   .use { it.readLine() }
   println("Hello $name!")
   }
   

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8. 
   
   
   
   # 1/02
   

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9. # 2013 / /
   

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10. 
    • 2 /-1 3 /- 20021 C 8
    # # # 2 /-1 0 #
    fun main(args: Array) {
    println("Hello world!")
    }
    20021 2 /-1 5
    

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11. 
    • 15 2/ 2/- 0 1
    # *5 2/ 3 1
    fun main(args: Array) {
    val name = readLine()
    println("Hello $name!")
    }
    *5 2/ 8
    

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12. 
    # 53 01 / 1 #
    import java.io.BufferedReader
    import java.io.File
    fun main(args: Array) {
    val name = File("name.txt")
    .bufferedReader()
    .use { it.readLine() }
    println("Hello $name!")
    }
    01 / 28
    

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13. 
    • /350-2 5 0-
    # # # 8 350-2 1 /5 #
    fun main(args: Array) {
    window.alert("Hello World!")
    }
    350-2
    

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14. 
    
    # 2013 / /
    

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15. 
    # 1/02
    expect object Hello {
    fun say()
    }
    

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16. 
    
    # 2013 / /
    actual object Hello {
    actual fun say() =
    showDialog("Hello!")
    }
    actual object Hello {
    actual fun say() =
    window.alert("Hello!")
    }
    

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17. • 72 3 8
    • 2 5
    # 1 0 /
    expect open class BigInteger(`val`: String) {
    open fun add(`val`: BigInteger): BigInteger
    }
    actual typealias BigInteger = java.math.BigInteger
    
    
    

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18. • ,8 , 31132 13 0,
    0 351 13 0,
    # # # 3 0 2 1 / #
    fun main(args: Array) {
    val bi = BigInteger(”10”)
    val sum =
    bi.add(BigInteger(”20”))
    ...
    }
    
    

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19. • 8 9 0
    0 351 13 0
    # 3 0 2 1 /
    fun main(args: Array) {
    val bi = BigInteger(”10”)
    val div =
    bi.divide(BigInteger(”5”))
    ...
    }
    
    

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20. # 1/02 #
    

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21. 
    
    
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22. # 1/02 ##
    

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23. 
    
    # 1/02 #
    

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24. 
    $
    #!
    
    "
    
    # 2013 / / #
    

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25. 
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26. # D C 8 #
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29. # ( ( D 8 9 )
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32. 
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33. 
    
    # 1/02
    

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34. 
    
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    # 58204 3 18
    val hoge: dynamic = object {}
    hoge.fuga = {} // OK
    hoge.piyo().xxx.yyy() // OK
    

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35. 
    
    
    
    • 351 2 3
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    # 8 03 / 3
    expect class System {
    companion object {
    fun currentTimeMillis(): Long
    }
    }
    // NG
    actual typealias System = java.lang.System
    

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    # 360 2 1 /6
    // OK
    actual class System {
    actual companion object {
    actual fun currentTimeMillis()
    = java.lang.System.currentTimeMillis()
    }
    }
    

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37. 
    
    
    
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    # 3 0 2 1 /
    // OK
    actual fun System.Companion.currentTimeMillis()
    = java.lang.System.currentTimeMillis()
    class System {
    companion object
    }
    expect fun System.Companion.currentTimeMillis(): Long
    

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