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

class EchoServer {

  public static void main(String[] args) {
    System.out.println("EchoServer started."); 
    try {
      ServerSocket s = new ServerSocket(8008); 
      Socket incoming = s.accept(); 

      System.out.println("Connected to: " + incoming.getInetAddress() +
			 " at port: " + incoming.getLocalPort()); 
      
      BufferedReader in 
	= new BufferedReader(new InputStreamReader(incoming.getInputStream())); 
      PrintWriter out 
	= new PrintWriter(new OutputStreamWriter(incoming.getOutputStream())); 

      out.println("Hello! This is Java EchoServer. Enter BYE to exit."); 
      out.flush();
      
      for (;;) {
	String str = in.readLine(); 
	if (str == null) {
	  break; 
	} else {
	  out.println("Echo: " + str); 
	  out.flush();
	  System.out.println("Received: " + str);
	  
	  if (str.trim().equals("BYE")) 
	    break; 
	}
      }
      incoming.close(); 
    } catch (Exception e) {
      System.out.println("Error: " + e); 
    }
    System.out.println("EchoServer stopped."); 
  }

}