??Java中Socket上的Read操作阻塞问题

        BufferedInputStream in = new BufferedInputStream(socket.getInputStream());
        int r = -1;
        List<Byte> l = new LinkedList<Byte>();
        while ((r = in.read()) != -1) {
            l.add(Byte.valueOf((byte) r));
        }

        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));        
        String s;
        while ((s = in.readLine()) != null) {
            System.out.println("Reveived: " + s);
        }