import java.net.*;
class DNSAnfrage {
  public static void main(String[] args) {
    try {
      InetAddress ip = InetAddress.getByName(args[0]);
      System.out.println("Angefragter Name: " + args[0]);     
      System.out.println("IP-Adresse:       " + ip.getHostAddress());
      System.out.println("Host-Name:        " + ip.getHostName());     
    } 
    catch (ArrayIndexOutOfBoundsException aex) {
      System.out.println("Aufruf: java DNSAnfrage <hostname>");
    } 
    catch (UnknownHostException uex) {
      System.out.println("Kein DNS-Eintrag fuer " + args[0]);
    }
  }
}