~~~ public class EchoClient { private final String host; private final int port; public EchoClient(String host, int port) { this.host = host; this.port = port; } public void start() throws Exception{ EventLoopGroup group = new NioEventLoopGroup(); try { Bootstrap b = new Bootstrap(); b.group(group) .channel(NioSocketChannel.class) .remoteAddress(new InetSocketAddress(host, port)) .handler(new ChannelInitializer<SocketChannel>() { protected void initChannel(SocketChannel socketChannel) throws Exception { socketChannel.pipeline().addLast(new EchoClientHandler()); } }); ChannelFuture channelFuture = b.connect().sync(); channelFuture.channel().closeFuture().sync(); }finally { group.shutdownGracefully().sync(); } } public static void main(String[] args) throws Exception { new EchoClient("127.0.0.1", 10001).start(); } } ~~~