Mastering Kotlin

Secondary constructors

The primary constructor is considered the default way to instantiate a class, but we can define secondary constructors as well to provide alternative ways to create a class instance. The following code shows how to add a secondary constructor to our School class:

class School {    var name = ""        constructor(schoolName: String) {        name = schoolName    }}

To add a secondary constructor, we can use the constructor keyword within the class body to define the new constructor logic. In this example, we've added a secondary constructor that takes a schoolName parameter to be assigned to the name property.

If a class has a primary constructor, then any secondary constructors must delegate to the primary constructor before any new ...