Questions tagged [kotlin-companion]

Kotlin Companion

The Kotlin Companion keyword is used to indicate that a particular class has a companion object. A companion object is an object that is defined inside a class and has the same name as the class, but with a companion keyword in front of it.

Companion objects are used for several purposes, such as:

• They can contain factory methods for creating instances of the class.
• They can provide a singleton instance of the class.
• They can contain additional utility methods related to the class.

Here is an example of a class with a companion object:

class MyClass {
    companion object {
        fun create(): MyClass {
            // factory method
            return MyClass()
        }
    }
}

val myObject = MyClass.create()