public ClassHeader onDataType1(DatagramPacket data) {
        ClassAD clazz = new ClassAD();
        for (int i = 0; i < data.getLength(); i++) {
            // 起始标志 4*2
            if (i <= 1) {
                clazz.starter[i] = data.getData()[i];
            }
            // 报文类型 1*2 --------------------
            else if (i == 2) {
                clazz.type[i - 2] = data.getData()[i];
            }
            // 正文长度 2*2
            else if (3 <= i && i <= 4) {
                clazz.contentLength[i - 3] = data.getData()[i];
            }
            // 时
            else if (i == 5) {
                System.out.println("时:"
                        + Integer.parseInt(data.getData()[i] + "", 16));
            }
            // 分
            else if (i == 6) {
                System.out.println("分:"
                        + Integer.parseInt(data.getData()[i] + "", 16));
            }
            // 秒
            else if (i == 7) {
                System.out.println("秒:"
                        + Integer.parseInt(data.getData()[i] + "", 16));
            }
            // MMSI 4*2
            else if (9 <= i && i <= 12) {
                clazz.mmsi[i - 9] = data.getData()[i];
            }
        }
        System.out.println("start:" + clazz.getStarter());
        System.out.println("type:" + clazz.getType());
        System.out.println("contentLength:" + clazz.getContentLength());

        return clazz;
    }