Question

我有一个使用JLabel的服务器 - 客户端程序，我正在尝试与特定客户端进行通信。当我接受任何客户端时，我将socket添加到ArrayList<Socket>，然后我将socket = socketList.get(1);分配给我的第一个JLabel，以便套接字将包含连接到服务器的第一个客户端。但是没有发生任何沟通。我无法确定问题。

//服务器

 private void jLabel2MouseClicked(java.awt.event.MouseEvent evt) {                                     
            PrintWriter out;

            try {
                 socket = socketList.get(2);

            out = new PrintWriter(socket.getOutputStream(), true);
            out.println("pc2");
            } catch (IOException ex) {
            Logger.getLogger(third_frame.class.getName()).log(Level.SEVERE, null, ex);
            }
       }                                    

 public void postListen()
{
    new Thread(new Runnable()
    {
        public void run()
        {
            connect_clients();
        }

    }).start();
  }

  //checking clients connected
    void connect_clients()
    {
        try {
            ServerSocket listener = new ServerSocket(7700);
            jButton1.setText("Server Running!");
            jButton1.setEnabled(false);

            try {
                while (true) {

                    //socket = listener.accept();
                    socketList.add(listener.accept());
                    try {

                            clientIP = socket.getLocalAddress().getHostName();


                    }    
                    finally
                            {

                            }
                }
            }

               finally
                            {

                            }

            }
        catch(IOException ex)
        {
        }
    }

//客户端

void connect_server()
    {
        try {
            // TODO code application logic here
            String serverAddress = JOptionPane.showInputDialog(
                    "Enter IP Address of a machine that is\n" +
                            "running the date service on port 9090:");
            s = new Socket(serverAddress, 7700);

            while(true){
            BufferedReader input =
            new BufferedReader(new InputStreamReader(s.getInputStream()));
            String answer = input.readLine();

            System.out.println(answer);
            }

            }


        catch (IOException ex) {
            Logger.getLogger(client_form.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

Answer 1

对我而言似乎你没有初始化你的套接字然后尝试调用它，但是如果没有所有代码和错误，很难知道什么是错的。

//socket = listener.accept();
socketList.add(listener.accept());
try {
    clientIP = socket.getLocalAddress().getHostName();

Socket的ArrayList无法向客户端发送消息 - Java

1 个答案: