import java.net.*;
public class Example13_2 {
   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");
      }
   }
}