public class Tester {


    public static abstract class A {
        abstract void work();
        void huh(Tester t) {
            t.make(this);
        }
    }
    public static class B extends A {
        @Override
        void work() {
            System.out.println("B");
        }


    }

    public static class C extends A {
        @Override
        void work() {
            System.out.println("C");
        }
    }

    public static class BB extends B {
        @Override
        void work() {
            System.out.println("BB");
        }
    }



    void make(A a) {
        a.work();
        System.out.println("A generic");
    }

    void make(B b) {
        b.work();
        System.out.println("B overload");
    }

    void make(BB b) {
        b.work();
        System.out.println("BB overload");
    }

    void make(C c) {
        c.work();
        System.out.println("C overload");
    }




    public static class Tester2 extends Tester {

        @Override
        void make(A a) {

            super.make(a);
            System.out.println("Tester2");
        }

        @Override
        void make(B b) {

            super.make(b);
            System.out.println("Tester2");
        }

        @Override
        void make(BB b) {

            super.make(b);
            System.out.println("Tester2");
        }

        @Override
        void make(C c) {

            super.make(c);
            System.out.println("Tester2");
        }




    }



    public static void main(String[] args) {

        Tester t = new Tester();
        Tester t2 = new Tester2();
        B b = new B();
        BB bb = new BB();
        C c = new C();

        A ab = new B();
        A abb = new BB();
        A ac = new C();

        B bbb = new BB();


        t.make(b);
        t.make(bb);
        t.make(c);
        System.out.println("\n");
        t.make(ab);
        t.make(abb);
        t.make(ac);
        System.out.println("\n");
        t.make(bbb);
        System.out.println("\n");

        b.huh(t);
        bb.huh(t);
        c.huh(t);
        System.out.println("\n");
        b.huh(t2);
        bb.huh(t2);
        c.huh(t2);



    }

}