java - 如何将 IF ELSE 语句与流类一起使用？

Question

这是一个客户端-服务器 GUI 应用程序，在这里我想在它们之间发送和接收消息。条件是，当客户端向服务器发送“Hello”时，服务器只回复一条消息“Hello Client，我是服务器”。那么，在这种情况下我该如何使用 if else 呢？

    public void startRunning() throws ClassNotFoundException
    {
        try
        {
            server = new ServerSocket(port, totalClients);
            while(true)
            {
                try
                {
                    status.setText(" Waiting for Someone to Connect...");
                    connection = server.accept();
                    status.setText(" Now Connected to " + connection.getInetAddress().getHostName());


                    output = new ObjectOutputStream(connection.getOutputStream());
                    //output.flush();
                    input = new ObjectInputStream(connection.getInputStream());

                    whileChatting();

                }catch(EOFException eofException)
                {
                }
            }
        }
        catch(IOException ioException)
        {
        }
    }

    private void whileChatting() throws IOException, ClassNotFoundException
    {
         String message="";    
         jTextField1.setEditable(true);

         do{
                message = (String) input.readObject(); 
                chatArea.append("\n"+message);

         }

         while(!message.equalsIgnoreCase("Client - Quit"));
    }

private void sendMessage(String message)
{
    try
    {
        output.writeObject("Server - " + message);
        output.flush();
        chatArea.append("\nServer - " + message);
    }
    catch(IOException ioException)
    {
        chatArea.append("\n Unable to Send Message");
        JOptionPane.showMessageDialog(null,"Unable to Send Message", "Warning", JOptionPane.WARNING_MESSAGE);
    }
}

Answer 1

查看您的代码并尝试找出消息的接收和处理发生的位置。

检查“Hello”的 if 语句并通过

发回您的消息

sendMessage("Hello Client, I am server")