How does string interpolation work in Kotlin?

Question

Does the Kotlin compiler translate \"Hello, $name!\" using something like

java.lang.String.format(\"Hello, %s!\", name)

or is

Answer 1

Regarding your 2nd question: If you need caching for fullName, you may and should do it explicitly:

class Client {
    val firstName: String
    val lastName: String
    val fullName = "$firstName $lastName"
}

This code is equivalent to your snipped except that the underlying getter getFullName() now uses a final private field with the result of concatenation.