Kotlin方言

package my.demo

import java.awt.Color
import java.io.File
import java.lang.ArithmeticException
import java.lang.IllegalArgumentException
import java.lang.IllegalStateException

object Resource{
    const val name = "Name"
}
abstract class MyAbstractClass
{
    abstract fun doSomething()
    abstract fun sleep()

}
class DemoIdioms {
}
fun transform(color: String):Int{
    return when(color){
        "Red" -> 0
        "Green" -> 1
        "Blue" -> 2
        else -> throw IllegalArgumentException("Invalid color param value")
    }
}
fun test(){
    val result = try{
        println("count")
    }catch (e:ArithmeticException)
    {
        throw IllegalStateException(e)

    }
}
class Turtle
{
    var len:Int = 0
    var breadth = 5
    var col: Int = 0xFAFAFA

    fun penDown(){
        println("penDown")
    }
    fun penUp(){
        println("penUp")
    }
    fun turn(degrees:Double){
        println("turn $degrees")
    }

    fun forward(pixels:Double){
        println("forward $pixels")
    }


}
fun main()
{
    var a = 1
    var b = 2
    a = b.also { b = a }
    println("a = $a b = $b")
//    var myTurtle1 = Turtle().apply {
//        len = 1
//        breadth = 4
//        col = 11
//
//    }
//    val myTurtle = Turtle()
//    with(myTurtle){
//        penDown()
//        for(i in 1..4){
//            forward(1.1)
//            turn(2.2)
//        }
//        penUp()
//    }
//    val y = if(x == 1)
//    {
//        "one"
//    }else if(x == 2){
//        "two"
//    }else
//    {
//        "other"
//    }
//    println(transform("Red"))
//    val files = File("../").listFiles()
//    println(files?.size)
//    println("abc".AddXXX())
//    val myObject = object:MyAbstractClass(){
//        override fun doSomething() {
//
//        }
//        override fun sleep()
//        {
//
//        }
//    }
//    myObject.doSomething()
}
fun String.AddXXX():String
{
    return this.toString()+"xxx"

}