编程实现，客户端输入两个数，服务端计算结果，并返回，要求服务端用多线程实现java代码

以下是一个用 Java 实现的多线程服务端，可以接收客户端输入的两个数，并计算结果返回给客户端：

import java.io.*;
import java.net.*;
import java.util.concurrent.*;

public class MultiThreadedServer {
    public static void main(String[] args) {
        ExecutorService executorService = Executors.newCachedThreadPool();

        try (ServerSocket serverSocket = new ServerSocket(8888)) {
            while (true) {
                Socket socket = serverSocket.accept();
                executorService.execute(new ServerTask(socket));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static class ServerTask implements Runnable {
        private final Socket socket;

        public ServerTask(Socket socket) {
            this.socket = socket;
        }

        @Override
        public void run() {
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                 BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()))) {
                // 接收客户端输入的两个数
                String[] nums = reader.readLine().split(" ");
                int num1 = Integer.parseInt(nums[0]);
                int num2 = Integer.parseInt(nums[1]);

                // 计算结果
                int result = num1 + num2;

                // 返回结果给客户端
                writer.write(Integer.toString(result));
                writer.newLine();
                writer.flush();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

客户端可以通过以下代码与服务端进行交互：

import java.io.*;
import java.net.*;

public class Client {
    public static void main(String[] args) {
        try (Socket socket = new Socket("localhost", 8888);
             BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
             BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
             BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in))) {
            // 输入两个数
            System.out.print("请输入第一个数：");
            String num1 = inputReader.readLine();
            System.out.print("请输入第二个数：");
            String num2 = inputReader.readLine();

            // 发送两个数到服务端
            writer.write(num1 + " " + num2);
            writer.newLine();
            writer.flush();

            // 接收服务端返回的结果
            String result = reader.readLine();

            // 输出结果
            System.out.println("计算结果为：" + result);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

注意：上述代码没有对客户端输入的数进行校验，实际使用中应该添加相应的校验逻辑。