list的排序问题

Collections.sort(list, new Comparator<HashMap>()
{

    @Override
    public int compare(HashMap o1, HashMap o2)
    {
        String code1 = (String) o1.get("code");
        String code2 = (String) o2.get("code");
        int c1 = 0;
        int c2 = 0;
        try
        {
            c1 = Integer.parseInt(code1);
        }
        catch (Exception e)
        {
            return -1;
        }
        try
        {
            c2 = Integer.parseInt(code2);
        }
        catch (Exception e)
        {
            return 1;
        }
        if (c1 > c2)
        {
            return 1;
        }
        else if (c1 < c2)
        {
            return -1;
        }
        else
        {
            return 0;
        }
    }
});