public class Nio2CompletionHandlerEchoServer {

   public static void main(String[] args) throws IOException {
       AsynchronousServerSocketChannel serverSocketChannel = AsynchronousServerSocketChannel.open();
       serverSocketChannel.bind(new InetSocketAddress(7000));

       AcceptCompletionHandler acceptCompletionHandler = new AcceptCompletionHandler(serverSocketChannel);
       serverSocketChannel.accept(null, acceptCompletionHandler);

       System.in.read();
   }
}