Groups > comp.lang.java.programmer > #11756

getting Fully Qualified Domain Name (FQDN) ...

From	lbrt chx _ gemale
Newsgroups	comp.lang.java.programmer
Subject	getting Fully Qualified Domain Name (FQDN) ...
Organization	Acecape, Inc.
Organization	Newshosting.com - Highest quality at a great price! www.newshosting.com
Message-ID	<1328524387.448743@nntp.aceinnovative.com> (permalink)
Date	2012-02-06 10:33 +0000

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/*
 Say you want to keep the local copies of documents you download/view online in a directory structure that somewhat resembles the URL path.
 When you use firefox as the browser it seems to darken the FQDN, but then you can check it doesn't do it truthfully. Try for example:
~ 
 http://www-hiel.ist.osaka-u.ac.jp/~iizuka/Hiroyuki_Iizuka.html
 http://www.c.u-tokyo.ac.jp/eng_site/
~ 
 Why is it that u-tokyo.ac.jp throws an UnknownHostException?
~ 
 lbrtchx
~ 
*/

import java.net.*;
import java.util.*;

// __ 
public class GetCanonicalHostName{
 public static void main(String[] args){
  String[] aHNms = new String[]{"sussex.ac.uk", "ac.uk", "www.mathstat.dal.ca", "mathstat.dal.ca", "dal.ca", "www-hiel.ist.osaka-u.ac.jp", "ist.osaka-u.ac.jp", "osaka-u.ac.jp", "ac.jp" , "www.c.u-tokyo.ac.jp", "c.u-tokyo.ac.jp", "u-tokyo.ac.jp", "hardware.slashdot.org", "slashdot.org"};
// __ 
  InetAddress ia = null;
  for(int i = 0; (i < aHNms.length); ++i){
   System.out.println("~");
   System.out.println("// __ " + aHNms[i] + ":");
   System.out.println("~");
   try{
    ia = InetAddress.getByName(aHNms[i]);
    System.out.println(ia.getCanonicalHostName() + ": " + ia.getHostAddress());
   }catch(UnknownHostException UnkHX){ UnkHX.printStackTrace(); }
  }
  System.out.println("~");
 }
}

/*
$ java GetCanonicalHostName
~
// __ sussex.ac.uk:
~
139.184.32.141: 139.184.32.141
~
// __ ac.uk:
~
java.net.UnknownHostException: ac.uk
 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
 at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
 at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
 at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
 at java.net.InetAddress.getAllByName(InetAddress.java:1128)
 at java.net.InetAddress.getAllByName(InetAddress.java:1064)
 at java.net.InetAddress.getByName(InetAddress.java:1014)
 at GetCanonicalHostName.main(GetCanonicalHostName.java:22)
~
// __ www.mathstat.dal.ca:
~
support.MathStat.Dal.Ca: 129.173.118.86
~
// __ mathstat.dal.ca:
~
support.MathStat.Dal.Ca: 129.173.118.86
~
// __ dal.ca:
~
Dal.Ca: 129.173.1.241
~
// __ www-hiel.ist.osaka-u.ac.jp:
~
marino.ise.eng.osaka-u.ac.jp: 133.1.52.68
~
// __ ist.osaka-u.ac.jp:
~
java.net.UnknownHostException: ist.osaka-u.ac.jp
 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
 at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
 at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
 at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
 at java.net.InetAddress.getAllByName(InetAddress.java:1128)
 at java.net.InetAddress.getAllByName(InetAddress.java:1064)
 at java.net.InetAddress.getByName(InetAddress.java:1014)
 at GetCanonicalHostName.main(GetCanonicalHostName.java:22)
~
// __ osaka-u.ac.jp:
~
java.net.UnknownHostException: osaka-u.ac.jp
 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
 at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
 at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
 at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
 at java.net.InetAddress.getAllByName(InetAddress.java:1128)
 at java.net.InetAddress.getAllByName(InetAddress.java:1064)
 at java.net.InetAddress.getByName(InetAddress.java:1014)
 at GetCanonicalHostName.main(GetCanonicalHostName.java:22)
~
// __ ac.jp:
~
java.net.UnknownHostException: ac.jp
 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
 at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
 at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
 at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
 at java.net.InetAddress.getAllByName(InetAddress.java:1128)
 at java.net.InetAddress.getAllByName(InetAddress.java:1064)
 at java.net.InetAddress.getByName(InetAddress.java:1014)
 at GetCanonicalHostName.main(GetCanonicalHostName.java:22)
~
// __ www.c.u-tokyo.ac.jp:
~
park.itc.u-tokyo.ac.jp: 133.11.205.76
~
// __ c.u-tokyo.ac.jp:
~
park.itc.u-tokyo.ac.jp: 133.11.205.76
~
// __ u-tokyo.ac.jp:
~
java.net.UnknownHostException: u-tokyo.ac.jp
 at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
 at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:867)
 at java.net.InetAddress.getAddressFromNameService(InetAddress.java:1246)
 at java.net.InetAddress.getAllByName0(InetAddress.java:1197)
 at java.net.InetAddress.getAllByName(InetAddress.java:1128)
 at java.net.InetAddress.getAllByName(InetAddress.java:1064)
 at java.net.InetAddress.getByName(InetAddress.java:1014)
 at GetCanonicalHostName.main(GetCanonicalHostName.java:22)
~
// __ hardware.slashdot.org:
~
star.slashdot.org: 216.34.181.48
~
// __ slashdot.org:
~
slashdot.org: 216.34.181.45
~
*/

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 getting Fully Qualified Domain Name (FQDN) ...  lbrt chx _ gemale - 2012-02-06 10:33 +0000
  Re: getting Fully Qualified Domain Name (FQDN) ... Steven Simpson <ss@domain.invalid> - 2012-02-06 11:53 +0000

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