Java で IoT テクノロジーを使用してインテリジェントなデバイスやシステムを実装するにはどうすればよいですか?

String broker = "tcp://iot.eclipse.org:1883";
String clientId = "JavaClient";
MemoryPersistence persistence = new MemoryPersistence();

try {
    MqttClient client = new MqttClient(broker, clientId, persistence);
    MqttConnectOptions connOpts = new MqttConnectOptions();
    connOpts.setCleanSession(true);
    client.connect(connOpts);

    String topic = "sensors/temperature";
    int qos = 1;
    client.subscribe(topic, qos);

    MqttMessage message = new MqttMessage();
    message.setPayload("25".getBytes());
    client.publish(topic, message);

    client.disconnect();
} catch (MqttException me) {
    me.printStackTrace();
}

CoapClient client = new CoapClient("coap://iot.eclipse.org/temperature");
CoapResponse response = client.get();
if (response != null) {
    System.out.println(response.getResponseText());
}

String url = "jdbc:mysql://localhost:3306/iot";
String username = "root";
String password = "123456";

Connection conn = null;
Statement stmt = null;
ResultSet rs = null;

try {
    conn = DriverManager.getConnection(url, username, password);
    stmt = conn.createStatement();

    String sql = "INSERT INTO temperature (value, time) VALUES (25, NOW())";
    stmt.executeUpdate(sql);

    sql = "SELECT * FROM temperature";
    rs = stmt.executeQuery(sql);
    while (rs.next()) {
        int value = rs.getInt("value");
        Date time = rs.getDate("time");
        System.out.println("Value: " + value + ", Time: " + time);
    }
} catch (SQLException se) {
    se.printStackTrace();
} finally {
    try {
        if (rs != null) rs.close();
        if (stmt != null) stmt.close();
        if (conn != null) conn.close();
    } catch (SQLException se) {
        se.printStackTrace();
    }
}