import java.io.BufferedWriter;

import java.io.OutputStreamWriter;

import java.net.ServerSocket;

import java.net.Socket;

public class Main {

  public static void main(String[] argv) throws Exception {

    int port = 2000;

    ServerSocket srv = new ServerSocket(port);

    // Wait for connection from client.

    Socket socket = srv.accept();

    BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

    wr.write("aString");

    wr.flush();

  }

}