如何同时从标准输入和套接字读取数据（java多线程套接字编程）

此程序向用户提示三个选项：

Enter an option ('m', 'f', 'x'): 

(M)essage (send)

(F)ile (request) 

e(X)it 

我只想关注“M”和“M”选项。（不允许为此添加“接收”选项）

代码运行的屏幕截图（服务器端错误）：

---

代码运行的屏幕截图（成功的客户端）：

---

问题在于

缓冲读取器readStandardInput

和

BufferedReader readFromClient

无法同时执行（或至少同时读取同一行代码）。我想知道如何使它们同时执行

代码：

我的问题是：

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如何使第一个屏幕截图中的服务器能够输入选项“m”，同时从客户端套接字读取一行内容

Java标准输入流和

Java.net.Socket

正在阻塞（因此，一旦您在

Socket.getInputStream

或

系统上调用
read
。在

中，您的应用程序将等待接收到某个内容），这意味着您无法在同一线程中同时执行这些内容的读取

如果您设置了另一个线程为客户端连接提供服务，那么您将能够在等待控制台输入时从客户端接收数据

try{
    OutputOptions();
    String sendingMessage = "";
    BufferedReader readFromClient = null;
    String fromClient = "";
    if(isConnected == true){
        readFromClient = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        fromClient = readFromClient.readLine();
        System.out.println("Recieved from client: " + fromClient);

      //The  4 lines above this comment are recieving a message from the client
     //the lines below this comment are reading from standard input
     //I want to be able to do both the above and the below lines at the same time (reading two types of input, standard and socket),
     //In other words, once the client sends a message after typing "m",
    //it should appear on the server side, but if i decide to type "m" first 
    //on the server side, then the client will also have to be able to
    //read that message, then afterwards be able to take in standard input

        BufferedReader readStandardInput = new BufferedReader(new InputStreamReader(System.in));
        option = readStandardInput.readLine();
        if (option.length() == 1){
              if(option.equals("m") || option.equals("M")){
                  System.out.println("Enter your message: ");
                  StandardOutput();

              }
              if(option.equals("m") || option.equals("M")){
                 System.out.println("Enter your message: ");
                 StandardOutput();

              }
              if(option.equals("f") || option.equals("F")){
                 FileTransferReceive();
              }
              if(option.equals("x") || option.equals("X")){
                 System.exit(0);
              }
              else{
                  StandardOutput();
              }
           }
           else{
                StandardOutput();
           }
        }

     //}
  }catch (IOException e){
        e.printStackTrace();
  }
  finally{ }