Question

我是一个非常初级的Java开发人员（准确地说是想开发的人），并且我尝试使用Youtube教程作为参考来学习Java套接字。我的代码似乎与视频中的所有内容都匹配（变量名称除外），但是，当尝试运行服务器然后运行客户端套接字时，我得到了一个：

Exception in thread "main" java.net.BindException: Address already in use (Bind failed)

我甚至尝试打印local port只是为了确保我连接到正确的可用端口，但是没有任何效果。我可以参考任何文档来解决此问题吗？或任何指导？

这是我到目前为止的代码：

Server.java

    public class serverSocket {
     public static void main(String args[]) throws IOException{

      String message, serverResponse;

      ServerSocket serverSocket =  new ServerSocket(56789);
      System.out.print(serverSocket.getLocalPort());
      Socket acceptClientRequestSocket = serverSocket.accept();
      Scanner serverScanner = new Scanner(acceptClientRequestSocket.getInputStream());
      message = serverScanner.next();
       System.out.println(message);
      serverResponse = message.toUpperCase();

      PrintStream newMessage = new PrintStream(acceptClientRequestSocket.getOutputStream());
      newMessage.println(serverResponse);    

     }
    }

Client.java


   public class clientSocket {

    public static void main(String args[]) throws UnknownHostException, IOException {

        String message,outputMessage;
        Scanner clientInput =  new Scanner(System.in);
        Socket clientSocket = new Socket("localhost",56789);
        Scanner incomingStream = new Scanner(clientSocket.getInputStream());
        System.out.println("Enter a message");
        message = clientInput.next();
        PrintStream printClientStream=  new PrintStream(clientSocket.getOutputStream());
        printClientStream.println(message);
        outputMessage = incomingStream.next();
        System.out.println(outputMessage);

    }
    }

遇到java.net.BindException：服务器客户端套接字应用上已在使用地址（绑定失败）

0 个答案: