Kotlin Tutorial
Kotlin Nested and Inner Class (Explained With Examples)
Table of Contents
- Introduction
- What is Nested Class in Kotlin?
- Example of Nested Class in Kotlin
- Kotlin Inner Class
- Kotlin Nested Class vs Inner Class (Difference)
- Kotlin Nested Class vs Java Nested Class
- Advantages of Nested and Inner Classes in Kotlin
- Disadvantages of Nested and Inner Classes in Kotlin
- Kotlin Full Course Video for Beginners [FREE]
Kotlin Full Course Video for Beginners [FREE]
Kotlin Nested and Inner Classes- FAQs
To create an instance of a nested class, you use the syntax OuterClass.NestedClass() for regular nested classes and outerInstance.InnerClass() for inner classes. For inner classes, you typically need an instance of the outer class.
You should use a regular nested class when you want to encapsulate functionality within a class but do not need access to the outer class's members. It behaves like a regular top-level class.
You should use an inner class when you need access to the members of the outer class or want to establish a strong relationship between the inner and outer classes. Inner classes are marked with the inner keyword.
Yes, Kotlin's nested and inner classes can interoperate with Java code. You can use Kotlin nested and inner classes in Java and vice versa.
In Kotlin, nested classes are static by default unless marked with the inner keyword. In Java, nested classes are non-static (inner) by default, and you use the static keyword to make them static nested classes.
Yes, you can create multiple instances of an inner class, and each instance is associated with a specific instance of the outer class. This allows for multiple independent instances of the inner class, each with its own context.
