public class Base {
    int id = 1000;

    Base() {
        Base();
    }

    void Base() {
        System.out.println(++id);
    }
}

public class Derived extends Base {
    int id = 2000;

    Derived() {}

    void Base() {
        System.out.println(--id);
    }
}

public class Test {
    public static void main(String[] args) {
        Base base = new Derived();
    }
}