// Programm 5-1:  ./JDBCclientserver/HoleInternetAdresse.java
import java.net.*;
public class HoleInternetAdresse {
  public static void main(String[] args) {
    if (args.length < 1) 
      args = new String[]{"localhost"};
    try {
      InetAddress adr = InetAddress.getByName(args[0]);
      System.out.println("IP-Adr:  " + adr.getHostAddress());
      System.out.println("IP-Name: " + adr.getHostName());
    }
    catch (Exception e) {
      System.out.println("ungültige Adresse");
    }
  }
}                            // Ende class HoleInternetAdresse