Читать книгу Programming Kotlin Applications - Бретт Мак-Лахлин, Brett McLaughlin - Страница 81

This doesn't look a lot different. However, there's a problem. Compile this code and you're going to get an error that, by now, is probably becoming a bit familiar:

Error:(5, 5) Kotlin: Property must be initialized or be abstract

What's going on here? Well, it's a little bit of a pain. Remember, any property, must either be assigned an initial value when they are declared (like firstName and lastName, for example), or be assigned a value in the init block.

Now, it looks like that's what is happening, but Kotlin doesn't quite follow your code the same way that you do. While it is possible to see that when init calls updateName(), then fullName will get a value, Kotlin just sees that there's no assignment to fullName in init and throws an error.