class DataWord implements Comparable<DataWord> {

    public void add2(DataWord word) {
		BigInteger result = value().add(word.value());
		this.data = ByteUtil.copyToArray(result.and(MAX_VALUE));
    }

    public  DataWord();
    public  DataWord(int num);
    public  DataWord(long num);
    public  DataWord(byte[] data);

}