private String makeHexStr() {

		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < data.getFileContent().length; i++) {
			sb.append(EncodingUtil.toHexString(data.getFileContent()[i]));
			sb.append("  ");
			if (i % byteInLine == (byteInLine - 1)) {
				sb.append("\n");
			}
		}

		return sb.toString();
	}