public int compare(Object obj1,
    Object obj2) 
{
        double dbl1 = 0;
        if (obj1 instanceof Number)
        {
            dbl1 = ((Number) obj1).doubleValue();
        }
        else if (obj1 != null)
        {
            dbl1 = ((Number) ConvertUtils.convert(obj1.toString(), Number.class)).doubleValue();
        }
        double dbl2 = 0;
        if (obj2 instanceof Number)
        {
            dbl2 = ((Number) obj2).doubleValue();
        }
        else if (obj1 != null)
        {
            dbl2 = ((Number) ConvertUtils.convert(obj2.toString(), Number.class)).doubleValue();
        }
        return new Double(dbl1).compareTo(new Double(dbl2));
}