Читать книгу Programming Kotlin Applications - Бретт Мак-Лахлин, Brett McLaughlin - Страница 73

package org.wiley.kotlin.person class Person(firstName: String, lastName: String, height: Double, age: Int, hasPartner: Boolean) { var fullName: String var firstName: String = firstName var lastName: String = lastName var height: Double = height var age: Int = age var hasPartner: Boolean = hasPartner // Set the full name when creating an instance init { fullName = "$firstName $lastName" } override fun toString(): String { return fullName } }

Take just the line dealing with firstName :

var firstName: String = firstName

A property is declared, and it's both read and write, because var is used. (Remember, if you wanted this to be a read-only property, you'd use val.) That property is given a name— firstName—and then a type, String. Then, the new property is assigned a value. In this case, that value is whatever is passed into the constructor through firstName.

You can now compile your code and run it, and it works again! (Although there's still that last name issue to fix. But you're getting closer.)