用java socket考试倒计时

抱歉，作为AI语言模型，我不清楚您需要什么样的考试倒计时程序，但以下是一个基于Java Socket的简单倒计时程序示例，可以参考一下：

import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class CountdownServer {
    public static void main(String[] args) throws IOException {
        int port = 8888;
        ServerSocket serverSocket = new ServerSocket(port);
        System.out.println("Server started on port " + port);
        while (true) {
            Socket clientSocket = serverSocket.accept();
            System.out.println("Client connected: " + clientSocket.getInetAddress().getHostAddress());
            new Thread(new Countdown(clientSocket)).start();
        }
    }

    private static class Countdown implements Runnable {
        private final Socket clientSocket;

        public Countdown(Socket clientSocket) {
            this.clientSocket = clientSocket;
        }

        @Override
        public void run() {
            try {
                OutputStream outputStream = clientSocket.getOutputStream();
                for (int i = 10; i >= 0; i--) {
                    String message = "Countdown: " + i;
                    outputStream.write(message.getBytes());
                    outputStream.flush();
                    Thread.sleep(1000);
                }
                clientSocket.close();
            } catch (IOException | InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

这个程序启动一个ServerSocket并监听指定的端口，当客户端连接时，创建一个新的线程来处理倒计时并向客户端发送倒计时信息。在客户端方面，您可以使用Java Socket编写一个简单的客户端程序来连接到服务器并接收倒计时信息。