Kotlin基础教程-嵌套类

嵌套类

定义嵌套类

class Outer {

    private val bar: Int = 1

    class Nested {
        fun foo() = 2
    }
}


fun main(args: Array<String>) {
    val demo = Outer.Nested().foo()
    println(demo)
}

内部类

fun main(args: Array<String>) {
//    val demo = Outer.Nested().foo()
    val demo = Outer().Inner().foo() //==1
    println(demo)
}


class Outer {
    private val bar: Int = 1
    inner class Inner {
        fun foo() = bar
    }
}