Java URL连接是否发送元数据？

当您通过URLConnection打开连接以读取网页内容时

try {
     URL url = new URL("https://stackoverflow.com/questions/46939965/does-java-urlconnection-send-metadata");
     URLConnection urlConnection = url.openConnection();
     HttpURLConnection connection;
     connection = (HttpURLConnection) urlConnection;

     BufferedReader in = new BufferedReader(
        new InputStreamReader(connection.getInputStream()));
     String current;

     while((current = in.readLine()) != null) {
        urlString += current;
     }
  }catch(IOException e) {
     e.printStackTrace();
  }

Java将留下什么信息？
像Webbrowser这样的统计数据会被保存吗？这就是“Java”吗

Thx需要帮助，
~Corn

HTTP“元数据”通常在中发送。表示web浏览器的那个通常被称为“用户代理”。我不相信Java会隐式地为您填充这些头