import
import
public class J_InetAddress extends InetAddress
{
    public static void main(String args[]){
        String s="www.tsinghua.
        InetAddress ts=null;
        try{
            ts=InetAddress.getByName(s);
        }
        catch(UnknownHostException e){
        System.out.println("发生异常"+e);
        e.printStackTrace();
        }
        if (ts!=null){
        System.out.println("清华大学的网络地址是："+ts.getHostAddress());
        System.out.println("清华大学的主机名是："+ts.getHostName());}
        }
        else
        {
            System.out.println("无法访问:"+s);
            }
    }
}
各位大哥大姐,帮忙!!!!!!!!!!!