Kotlin - Nested Class Example

A nested class is a class which is created inside another class. In Kotlin, the nested class is by default static, so its data member and member function can be accessed without creating an object of a class. The nested class cannot be able to access the data member of the outer class.

Kotlin Nested Class Example

package net.javaguides.kotlin class outerClass { private var name: String = "outerClass" class nestedClass { var description: String = "code inside nested class" private var id: Int = 101 fun foo() { // print("name is ${name}") // cannot access the outer class member  println("Id is ${id}") } } } fun main(args: Array < String > ) { // nested class must be initialize  println(outerClass.nestedClass().description) // accessing property  var obj = outerClass.nestedClass() // object creation  obj.foo() // access member function  }
Output:
code inside nested class Id is 101

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