scala的apply方法

package cn.itcast

/**
* Created by lishas on 2016/8/22.
*/
object ApplyDemo {

def apply(): Unit ={
println("apply invoked")
}

def apply(name:String):String={
name
}

def apply(name:Int):Int={
println("Int")
name
}

def main(args: Array[String]) {
//val a=ApplyDemo("tom")
val a=ApplyDemo(10)

println(a)

val arr=Array(1,2,3,4,5,6,7,8,9)
}
}

当获取伴生对象，Array不加括号，加括号就是调用apply方法