例11-4.txt

Java大学实用教程 耿祥义编著 课件 PPT

import java.net.*; 
public class DomainName
{ 
   public static void main(String args[])
  {  
     try{  
           InetAddress address_1=InetAddress.getByName("www.sina.com.cn");
           System.out.println(address_1.toString()); 
           InetAddress address_2=InetAddress.getByName("166.111.222.3");
           System.out.println(address_2.toString());
        }
    catch(UnknownHostException e)
        {  
           System.out.println("无法找到 www.sina.com.cn");
        } 
   }
}