What are alternatives to ServerSocket and how do they compare?

        // Example of using Netty as an alternative to ServerSocket
        import io.netty.bootstrap.ServerBootstrap;
        import io.netty.channel.ChannelFuture;
        import io.netty.channel.EventLoopGroup;
        import io.netty.channel.nio.NioEventLoopGroup;
        import io.netty.channel.socket.SocketChannel;
        import io.netty.channel.socket.nio.NioServerSocketChannel;
        import io.netty.channel.ChannelInitializer;

        public class NettyServer {
            private final int port;

            public NettyServer(int port) {
                this.port = port;
            }

            public void start() throws Exception {
                EventLoopGroup bossGroup = new NioEventLoopGroup();
                EventLoopGroup workerGroup = new NioEventLoopGroup();
                try {
                    ServerBootstrap b = new ServerBootstrap();
                    b.group(bossGroup, workerGroup)
                     .channel(NioServerSocketChannel.class)
                     .childHandler(new ChannelInitializer() {
                         @Override
                         public void initChannel(SocketChannel ch) {
                             // Pipeline configuration
                         }
                     });

                    ChannelFuture f = b.bind(port).sync();
                    f.channel().closeFuture().sync();
                } finally {
                    workerGroup.shutdownGracefully();
                    bossGroup.shutdownGracefully();
                }
            }

            public static void main(String[] args) throws Exception {
                new NettyServer(8080).start();
            }
        }