Server.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

public class Server {
  public static void main(String[] args) {
    final ServerSocket serverSocket;
    final Socket clientSocket;
    final BufferedReader in;
    final PrintWriter out;
    final Scanner keyboard = new Scanner(System.in);

    try {
      serverSocket = new ServerSocket(5000);
      clientSocket = serverSocket.accept();
      out = new PrintWriter(clientSocket.getOutputStream());
      in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

      Thread sender = new Thread(new Runnable() {
        String msg;
        @Override
        public void run() {
          while (true) {
            msg = keyboard.nextLine();
            out.println(msg);
            out.flush();
          }
        }
      });
      sender.start();

      Thread receive = new Thread(new Runnable() {
        String msg;
        @Override
        public void run() {
          try {
            msg = in.readLine();

            while (msg != null) {
              System.out.println("Client : " + msg);
              msg = in.readLine();
            }

            out.close();
            clientSocket.close();
            serverSocket.close();
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      });
      receive.start();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}