Calculating Fibonacci numbers with new switch expressions in Java 14

Fibonacci.java

public class Fibonacci {

    public static void main(String[] args) {
        for (String arg : args) {
            int n = Integer.valueOf(arg);
            System.out.printf("Fibonacci(%d) = %d%n", n, fibonacci(n));
        }
    }

    static int fibonacci(int n) {
        return switch (n) {
            case 0    -> 0;
            case 1    -> 1;
            default   -> fibonacci(n - 1) + fibonacci(n - 2);
        };
    }
}