Review

class PdfName {
    /**
     * Returns a hash code value for the object.
     * This method is supported for the benefit of hashtables such as those provided by
     * <code>java.util.Hashtable</code>.
     *
     * @return  a hash code value for this object.
     */
    @Override
    public int hashCode() {
        int h = hash;
        if (h == 0) {
            int ptr = 0;
            int len = bytes.length;
            for (int i = 0; i < len; i++)
                h = 31*h + (bytes[ptr++] & 0xff);
            hash = h;
        }
        return h;
    }

}