如何在JVM中实现套接字？

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) {
        int port = 8080;

        try (ServerSocket serverSocket = new ServerSocket(port)) {
            System.out.println("Server is listening on port " + port);

            while (true) {
                Socket socket = serverSocket.accept();
                System.out.println("New client connected");

                new Thread(() -> {
                    try (BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));) {
                        String inputLine;
                        while ((inputLine = in.readLine()) != null) {
                            System.out.println("Client: " + inputLine);
                            if (inputLine.equals("exit")) {
                                break;
                            }
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }).start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {
    public static void main(String[] args) {
        String host = "localhost";
        int port = 8080;

        try (Socket socket = new Socket(host, port)) {
            System.out.println("Connected to server: " + host + ":" + port);

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println("Server: " + inputLine);
                if (inputLine.equals("exit")) {
                    break;
                }
            }
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}