java - 为什么我的休息时间没有回到我的厂牌上？

Question

因此，对于学校，我正在尝试制作一个包含 2 个类的异步聊天程序；服务器和客户端。基本上，客户端连接到服务器，并写入文本，直到输入字符串或。如果输入，则客户端监听文本，服务器开始发送。如果输入，则客户端断开连接，服务器重置连接并等待客户端再次连接。我试图用一些 do..while 来解决这些要求，然后使用 continue 标签来重置连接。现在，如果客户端发送连接重置，但服务器只是停止构建而不是返回到我的 startConnections 标签。这是我正在使用中断的服务器的代码:

 public static void main(String args[]) {

    startConnections:
    {
        System.out.println("RESET TEST");

        try {
            server = new ServerSocket(12345, 100);


            System.out.println("Waiting for client");
            connection = server.accept();
            System.out.println("Client Connected");

            output = new ObjectOutputStream(connection.getOutputStream());

            output.flush();

            input = new ObjectInputStream(connection.getInputStream());

            do {

                do {
                    messageIn = (String) input.readObject();

                    System.out.println("CLIENT SAYS: " + messageIn);
                } while ((!messageIn.equals("<OVER>")) & (!messageIn.equals("<OUT>")));
                if (messageIn.equals("<OUT>")) {
                    break startConnections;
                }

                do {
                    System.out.print("RESPONSE: ");

                    keyboardInput = new Scanner(System.in);
                    messageOut = keyboardInput.nextLine();

                    output.writeObject(messageOut);

                } while (!messageOut.equals("<OVER>"));

            } while (!messageOut.equals("<OUT>"));

        } catch (Exception e) {
            System.out.println("Oops SERVER! : " + e.toString());
        }

    }
}

Answer 1

它有效 as it should

The break statement terminates the labeled statement; it does not transfer the flow of control to the label. Control flow is transferred to the statement immediately following the labeled (terminated) statement.

因此，在 break 调用之后执行的下一个语句是在标有 startConnections 的循环之后出现的语句

要获得您想要的行为，您需要使用继续:

continue startConnections;

A labeled continue statement skips the current iteration of an outer loop marked with the given label.