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// Exception handling has been omitted for the sake of brevity
class EchoServer { 
  public static void main(String[] args) throws IOException {
    ServerSocket serverSocket = null;
    try {
      serverSocket = new ServerSocket(10007); 
      Socket socket = serverSocket.accept();
			
      PrintWriter out = new PrintWriter(socket.getOutputStream(), true); 
      BufferedReader in = new BufferedReader(
                  new InputStreamReader(socket.getInputStream())); 
      String inputLine; 
      while ((inputLine = in.readLine()) != null) { 
        System.out.println(inputLine); 
        out.println(inputLine); 
      }
    } finally {
      try {
        serverSocket.close();
      } catch (IOException x) {
        System.err.println(x.toString());
      }
    }
  }
}

class EchoClient {
  public static void main(String[] args) throws UnknownHostException, IOException {
    Socket socket = null;
    try {
      socket = new Socket("localhost", 9999);
						
      PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
      BufferedReader in = new BufferedReader(
                  new InputStreamReader(socket.getInputStream()));

      BufferedReader stdIn = new BufferedReader(
                   new InputStreamReader(System.in));
			
      String userInput;
      while ((userInput = stdIn.readLine()) != null) {
        out.println(userInput);
        System.out.println(in.readLine());
      } 

    } finally {
      try {
        socket.close();
      } catch (IOException x) {
        System.err.println(x.toString());
      }
    }
  }
}

// Exception handling has been omitted for the sake of brevity
class EchoServer {
  public static void main(String[] args) throws IOException {
    SSLServerSocket sslServerSocket = null;
    try {
      SSLServerSocketFactory sslServerSocketFactory =
        (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
      sslServerSocket = (SSLServerSocket) sslServerSocketFactory.createServerSocket(9999);
      SSLSocket sslSocket = (SSLSocket) sslServerSocket.accept();

      PrintWriter out = new PrintWriter( sslSocket.getOutputStream(),true);
      BufferedReader in = new BufferedReader(
                  new InputStreamReader( sslSocket.getInputStream()));
      
      String inputLine;       
      while ((inputLine = in.readLine()) != null) { 
        System.out.println(inputLine); 
        out.println(inputLine); 
      } 

    } finally {
      try {
        sslServerSocket.close();
      } catch (IOException x) {
        System.err.println(x.toString());
      }
    }
  }
}

class EchoClient {
  public static void main(String[] args) throws IOException {
    SSLSocket sslSocket = null;
    try {
      SSLSocketFactory sslSocketFactory =
        (SSLSocketFactory) SSLSocketFactory.getDefault();
      sslSocket = (SSLSocket) sslSocketFactory.createSocket("localhost", 9999);

      PrintWriter out = new PrintWriter(sslSocket.getOutputStream(), true);
      BufferedReader in = new BufferedReader(
                  new InputStreamReader(sslSocket.getInputStream()));
			
      BufferedReader stdIn = new BufferedReader(
                   new InputStreamReader(System.in));
      
      String userInput;
      while ((userInput = stdIn.readLine()) != null) {
        out.println(userInput);
        System.out.println(in.readLine());
      }
  
    } finally {
      try {
        sslSocket.close();
      } catch (IOException x) {
        System.err.println(x.toString());
      }
    }
  }
}