Java 客户端-服务器ObjectInputStream错误

我的密码是

try
    {
        //Connect to the login server
        socket = new Socket(hostName , 15000);
        out = new ObjectOutputStream(socket.getOutputStream());
        input = new ObjectInputStream(socket.getInputStream());

                    .. //perform the login , if the login succeed make answ=1;
    }
    catch (UnknownHostException e) {
        System.err.println("Unknown host: " + hostName);
        StatusLabel.setText("Unknown host");
    }
    catch (ConnectException e) {
        System.err.println("Connection refused by host: " + hostName);
        StatusLabel.setText("Connection refused by host, server is down.");
    }
    catch (IOException e) {
        e.printStackTrace();
    }
    finally {
        try 
        {
            //Finaly closing the connection
            socket.close();
            System.out.flush();
            System.out.println("Socket Closed");
                            //closing the output and input stream
            out.close();
            input.close();
            setVisible(false); //closing the window
        }
        catch (IOException e ) {
            System.out.println("Couldn't close socket");
        }
    }
    if(answ==1) //if the login suceed start the class for the game
    {
        Gumoku_Graphics g = new Gumoku_Graphics();
        g.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        g.Play();
    }

在Gumoku_Graphics（）中，我调用这个类来执行与游戏服务器的连接

Game n = new Game();
status=n.Connection();

那是

 public int Connection()  
{
    try {
        socket = new Socket(hostName, 15432);
        System.out.println("socket ok\n");

        out = new ObjectOutputStream(socket.getOutputStream());
        System.out.println("out ok\n");


        input = new ObjectInputStream(socket.getInputStream());
        System.out.println("socket,out,input ok\n");
        return 1;
    }

    catch (UnknownHostException e) {
        System.err.println("Unknown host: " + hostName);
        return 0;
    }
    catch (ConnectException e) {
        System.err.println("Connection refused by host: " + hostName);
        return 0;
    }
    catch (IOException e) {
        e.printStackTrace();
        return 0;
    }
}

每次它在“input=newobjectinputstream（socket.getInputStream（））；”中停止时 它不能这样做，它卡在那里了。 它打印“插座正常”，“输出正常”，然后卡在那里。 有什么问题吗？我做错了什么？

来自：

创建从指定的InputStream读取的ObjectInputStream。从流中读取序列化流头并进行验证。此构造函数将阻塞，直到相应的ObjectOutputStream写入并刷新标头

正如引用的那样，调用将阻塞，直到可以读取标头。您需要有一些数据才能从套接字到达，然后才能继续此调用