How to ensure completeness in an enum switch at compile time?

Question

I have several switch statements which test an enum. All enum values must be handled in the switch statements by a case s

Answer 1

Functional approach with lambdas, much less code

public enum MyEnum {
    FIRST,
    SECOND,
    THIRD;

     T switchFunc(
            Function first,
            Function second,
            Function third
            // when another enum constant is added, add another function here
            ) {
        switch (this) {
            case FIRST: return first.apply(this);
            case SECOND: return second.apply(this);
            case THIRD: return third.apply(this);
            // and case here
            default: throw new IllegalArgumentException("You forgot to add parameter");
        }
    }

    public static void main(String[] args) {
        MyEnum myEnum = MyEnum.FIRST;

        // when another enum constant added method will break and trigger compile-time error
        String r = myEnum.switchFunc(
                me -> "first",
                me -> "second",
                me -> "third");
        System.out.println(r);
    }

}