@Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        Bruch bruch = (Bruch) o;

        if (ganze != bruch.ganze)
            return false;
        if (nenner != bruch.nenner)
            return false;
        return zaehler == bruch.zaehler;

    }