kotlin基本数据类型

通过idea创建kotlin项目：

创建kotlin文件

package com.czhappy.chapter01

var aBoolean:Boolean = true

var anInt:Int = 9
var anotherInt:Int = 0xFF
var maxInt:Int = Int.MAX_VALUE
var minInt:Int = Int.MIN_VALUE

var aLong:Long = 1234
var maxLong:Long = Long.MAX_VALUE
var minLong:Long = Long.MIN_VALUE

var aFloat:Float = 2.0f

var aDouble:Double = 3.0

var aShort:Short = 127

var byte:Byte = 127

var aChar:Char = '0'
var bChar:Char = '中'

var aString:String = "Hello"
var bString:String = String(charArrayOf('H','e','l','l','o'))

var aRange:IntRange = 0..10//[0,10]
var bRanage:IntRange=0 until 10//[0,10)

var aIntArray:IntArray = intArrayOf(1,3,5,7)
var aCharArray:CharArray = charArrayOf('h', 'e', 'l' , 'l', 'o')
var aStringArray:Array<String> = arrayOf("我", "是", "程序员")

fun main(args: Array<String>) {

    println("hello world")

    println(aString == bString)//true
    println(aString === bString)//false

    var arg1:Int = 1
    var arg2:Int = 2
    println("" + arg1 + "+" + arg2 + "=" + (arg1+arg2))
    println("$arg1 + $arg2 = ${arg1+arg2}")

    println(50 in aRange)
    println(aRange.contains(50))
    for(i in aRange){
        print("$i ")
    }

    println()

    println(aIntArray.size)
    for(i in aIntArray){
        print("$i ")
    }
    println()
    println(aCharArray.joinToString(""))
    println(aIntArray.slice(1..2))
    println(aStringArray.joinToString(""))
}

运行结果：

package com.czhappy.chapter01

open class Human(face:String, voice:String){
    init {
        println("我new了一个${this.javaClass.simpleName}，face：$face voice:$voice")
    }
}

class Man(face:String, voice:String):Human(face, voice)
class Woman(face:String, voice:String):Human(face, voice)

fun main(args: Array<String>) {
    var Jack:Man = Man("阳光", "浑厚")
    var Lucy:Woman = Woman("甜美", "动听")
    println(Jack is Human)
}

运行结果：