import java.net.*;

class net1
{   public static void main(String args[ ])throws UnknownHostException
    {   InetAddress addr1,addr2;
        addr1=InetAddress.getLocalHost( );
        addr2=InetAddress.getByName("www.sina.com.cn");
        System.out.println(addr1);
        System.out.println(addr2);
        InetAddress addr3[ ]=InetAddress.getAllByName("www.biti.edu.cn");
        for(int n=0;n<addr3.length;n++)
            System.out.println(addr3[n]);
    }
}