Mastering Kotlin

Custom accessors

In some situations, we may not want to rely on the default getter/setter that Kotlin provides. In those cases, we can provide our own custom accessors for any of our defined properties. For mutable variables, we can provide both custom getters and setters, while for read-only variables we can only provide a custom getter. To illustrate this, let's start by adding a custom setter for the description property, as follows:

1. We'll start with our existing Course class, which exposes a public description property:

class Course(courseTitle: String) {    ...    var description = ""}

2. To add a custom getter to the description property, we can then add a set(field) {} block immediately following the definition of description:

class Course ...