public static void main(String[] argv) {
        HashCodeAccessSet<Integer> hcas = new HashCodeAccessSet<Integer>();
        hcas.add(Integer.valueOf(6));
        hcas.add(Integer.valueOf(7));
        hcas.add(Integer.valueOf(9));
        System.out.println(hcas.forHashCode(7).intValue()==7 ? "good" : "bad");
        System.out.println(hcas.forHashCode(9).intValue()==9 ? "good" : "bad");
        System.out.println(hcas.forHashCode(6).intValue()==6 ? "good" : "bad");
        System.out.println(hcas.forHashCode(4423) == null ? "good" : "bad");
        System.out.println(hcas.forHashCode(4) == null ? "good" : "bad");
        System.out.println(hcas.forHashCode(8) == null ? "good" : "bad");
    }