当我使用输入流阅读器时，我无法在从缓冲阅读器读取数据后退出 while 循环

Question

 Socket socket = serverSocket.accept();
                    InputStream is = socket.getInputStream();
                    InputStreamReader isr = new InputStreamReader(is);
                   BufferedReader br=new BufferedReader(isr);
                    String number;
                    list.clear();
                      while ((number=br.readLine())!=null){
                       list.add(number);

                        }

while i trying to read the data from the buffered reader,i got the data.But i can't exit from the while loop if number equals null.

Answer 1

readLine() returns null at stream, and not before, and end of stream on a socket only occurs when the peer has closed the connection. Your expectations appear to be misplaced.

Answer 2

It's because you are failing at understanding the readline function and your implementation of it. You are reading data from your buffer and comparing the data to null, which is obviously not what you are wanting. So here is how I like to read data from a TCP socket.

while(statement == true){
    int count = bufferedInputStream.read(buffer);
    if (count == -1){
        // Socket has been closed
    } else {
        // Data has been read.
        // Do comparison here.
    }
}

Hope this helps.