Omitted Default

If you have no logic to put in it, you can omit the default case from a switch. This is the same conceptually as omitting a final else from a chain of ifs and else ifs.

void react(String fruit) {
    switch (fruit) {
        case "apple" -> {
            IO.println("WOW");
        }
        case "orange" -> {
            IO.println("Zoinks!");
        }
        case "grape" -> {
            IO.println("Zoopers!");
        }
    }
}

void main() {
    react("passionfruit"); // 🤷
}