问Netty与JDK版本冲突

EN

    EventLoopGroup pGroup = new NioEventLoopGroup();    
    EventLoopGroup cGroup = new NioEventLoopGroup();    
    ServerBootstrap b = new ServerBootstrap();

    b.group(pGroup, cGroup)                             
    .channel(NioServerSocketChannel.class)              
    .option(ChannelOption.SO_BACKLOG, 1024)             
    .option(ChannelOption.SO_SNDBUF, 32*1024)           
    .option(ChannelOption.SO_RCVBUF, 32*1024)           
    .option(ChannelOption.SO_KEEPALIVE, true)           
    .childHandler(new ChannelInitializer<SocketChannel>() {        // there is an error, which indicates that the generic <SocketChannel> is not a valid substitute according the eclipse automatic prompt

        @Override
        protected void initChannel(SocketChannel sc) throws Exception {
            sc.pipeline().addLast(new ServerHandler());            // there are two errors about the pipeline method and ServerHander construtor
        }

    });

    ChannelFuture cf1 = b.bind().sync();                

    cf1.channel().closeFuture().sync();                 

    pGroup.shutdownGracefully();
    cGroup.shutdownGracefully();