Mine

    class Ape {

    }

    class Gorilla extends Ape {

    }

    class Schimpanzee extends Ape {
    }

    void doIt(Ape ape) {
        System.err.println("Basklass");
    }

    void doIt(Schimpanzee schimpanzee) {
        System.err.println("Apa 1: " + schimpanzee.getClass().getName());
    }

    void doIt(Gorilla gorilla) {
        System.err.println("Apa 2: " + gorilla.getClass().getName());
    }

    public void testApa() {
        List<Ape> apa = new LinkedList<Ape>();

        doIt(new Ape());
        doIt(new Schimpanzee());
        doIt(new Gorilla());

        apa.add(new Ape());
        apa.add(new Schimpanzee());
        apa.add(new Gorilla());
        for(Ape a : apa) {
            doIt(a);
        }
    }