internal 模块内可见

成员默认是public

class House
class Flower
class Countyard{
    private val house: House = House()
    private val flower: Flower = Flower()
}
class ForbiddenCity{
    internal val houses = arrayOf(House(), House())
    val flowers = arrayOf(Flower(), Flower())
}
fun main(args: Array<String>) {
    val countyard = Countyard()
    val fc = ForbiddenCity()
    println(fc.flowers)
}