Android Development with Kotlin

Custom getters/setters

Sometimes, we want to have more control over the use of properties. We may want to perform other auxiliary operations when using a property, for example, verify a value before it's assigned to a field, log the whole operation, or invalidate an instance state. We can do this by specifying custom setters and/or getters. Let's add the ecoRating property to our Fruit class. In most cases, we would add this property to the class declaration header like this:

    class Fruit(var weight: Double,                 val fresh: Boolean,                 val ecoRating: Int) 

If we want to define custom getters and setters, we need to define a property in the class body instead of the class declaration header. Let's move the ecoRating property into the class body: ...