class Class {
    public int get_id() {
        return 1;
    }
}

interface Interface {
    default public int get_id() {
        return 2;
    }
}

class Successor extends Class implements Interface {
}

public class Main {

    public static void main(String[] args) {
        Successor s = new Successor();
        System.out.println(s.get_id());
    }
}