Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Exceptions and Interoperability

The hero has taught the Jhava monster language, and the monster will now extend its hand in friendship … or maybe not. Add a method, extendHandInFriendship, to Jhava.java.

Listing 20.34  Throwing an exception in Java (Jhava.java)

public class Jhava {
    ...
    public void offerFood() {
        Hero.handOverFood("pizza");
    }

    public void extendHandInFriendship() throws Exception {
        throw new Exception();
    }
}

Invoke this method in Hero.kt:

Listing 20.35  Invoking a method that throws an exception (Hero.kt)

@file:JvmName("Hero")

fun main(args: Array<String>) {
    ...
    adversary.offerFood()

    adversary.extendHandInFriendship()
}

fun makeProclamation() = "Greetings, beast!"
...

Run this code, and you will see that ...