Kotlin Classes and Objects (With Examples)

You define a class in Kotlin using the class keyword, followed by the class name and the class body enclosed in curly braces. For example: class MyClass { /* properties and methods */ }.

A constructor is a special function used to initialize an instance of a class. In Kotlin, the primary constructor is defined in the class header, and secondary constructors can be defined using the constructor keyword.

An init block is used to initialize properties or execute code when an object of a class is created. It is part of the class body and is executed during object initialization.

A data class is a special type of class in Kotlin that is primarily used for holding data. It automatically generates equals(), hashCode(), toString(), and copy() methods based on the class's properties. This is useful for creating classes that are primarily used for storing and manipulating data.

A companion object is an object declared within a class that is associated with the class itself, rather than with instances of the class. It is often used to define static methods or properties that are tied to the class rather than its instances.

To access properties and methods of a class, you create an instance of the class and use the instance name followed by the dot (.) operator to access the specific property or method you want.

An inner class is a class declared within another class. It can access the outer class's members and has a reference to an instance of the outer class. You define an inner class using the inner keyword.

No, in Kotlin, a class can inherit from only one superclass (single inheritance). However, a class can implement multiple interfaces, which allows it to inherit behavior from multiple sources.