以下代码中readstream（）的用途是什么？

Question

以下代码中readstream()函数的用途是什么？

URL url = new URL("http://www.android.com/");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
    InputStream in = new BufferedInputStream(urlConnection.getInputStream());
    readStream(in);
}
finally {
    urlConnection.disconnect();   
}

代码来自this link