Classes

In the previous tutorial, you learned about control flow. Now let’s learn about classes — the foundation of object-oriented programming in Kotlin. Watch the Video: Prefer watching? Check out the video version of this tutorial on YouTube. Kotlin classes are more concise than Java classes. What takes 50 lines in Java takes 1 line in Kotlin with data classes. In this tutorial, you will learn: Basic classes and properties Constructors (primary and secondary) Inheritance Abstract classes and interfaces Data classes Enum classes Sealed classes Objects and companion objects Basic Class A class in Kotlin has a primary constructor in the class header: ...