Java 奈蒂:界错配
我是java新手,尝试使用Netty构建一个示例tcp服务器。这是我目前拥有的Java 奈蒂:界错配,java,abstract-class,netty,nio,Java,Abstract Class,Netty,Nio,我是java新手,尝试使用Netty构建一个示例tcp服务器。这是我目前拥有的 package http_server; import java.net.InetSocketAddress; import java.nio.channels.SocketChannel; import netty_tutorial.EchoServerHandler; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.Chan
package http_server;
import java.net.InetSocketAddress;
import java.nio.channels.SocketChannel;
import netty_tutorial.EchoServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.ServerSocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
class server
{
ServerBootstrap bootstrap;
int port;
server(int port_)
{
port = port_;
bootstrap = new ServerBootstrap();
bootstrap.group(new NioEventLoopGroup());
bootstrap.channel(NioServerSocketChannel.class);
bootstrap.localAddress(new InetSocketAddress(port));
/**
* Add handlers using anonymous class
*/
/****PROBLEMATIC LINE*****/
bootstrap.childHandler(new ChannelInitializer<SocketChannel>()
{
@Override
protected void initChannel(SocketChannel ch) throws Exception {
// TODO Auto-generated method stub
System.out.println("hello");
}
}
);
}
}
public class simple_server
{
public static void main(String args[])
{
server server_obj = new server(8080);
}
}
我本来打算在initChannel方法中添加我的处理程序,但不知何故,我无法编译当前的程序。当我尝试编译此示例程序时,出现以下错误:
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
Bound mismatch: The type SocketChannel is not a valid substitute for the bounded parameter <C extends Channel> of the type ChannelInitializer<C>
at http_server.server.<init>
at http_server.simple_server.main
知道到底出了什么问题吗?您从错误的软件包中导入了SocketChannel 替换import java.nio.channels.SocketChannel
使用导入io.netty.channel.socket.SocketChannel 啊!盲目地点击第一个eclipse建议!。谢谢,作品:天才!你太棒了。