com.hfg.util.NetworkUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of com_hfg Show documentation

com.hfg xml, html, svg, and bioinformatics utility library

There is a newer version: 20240423

package com.hfg.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

//------------------------------------------------------------------------------
/**
 * General network utility methods.
 *
 * @author J. Alex Taylor, hairyfatguy.com
 */
//------------------------------------------------------------------------------
// com.hfg XML/HTML Coding Library
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// J. Alex Taylor, President, Founder, CEO, COO, CFO, OOPS hairyfatguy.com
// [email protected]
//------------------------------------------------------------------------------

public class NetworkUtil
{

   //###########################################################################
   // PUBLIC FUNCTIONS
   //###########################################################################

   //--------------------------------------------------------------------------
   /**
    Returns the fully qualified name of the local host.
    * @return the fully qualified name of the local host.
    */
   public static String getFullyQualifiedDomainName()
   {
      String qualifiedHostname;

      try
      {
         InetAddress addr = InetAddress.getLocalHost();
         qualifiedHostname = addr.getCanonicalHostName();
      }
      catch (UnknownHostException e)
      {
         throw new RuntimeException("Problem while determining the fully qualified host name!", e);
      }

      return qualifiedHostname;
   }

   //--------------------------------------------------------------------------
   public static String getHostNameForIPAddress(String inIPAddress)
   {
      String hostname = null;

      try
      {
         InetAddress addr = InetAddress.getByName(inIPAddress);
         hostname = addr.getHostName();
      }
      catch (UnknownHostException e)
      {
         // Ignore
      }

      return hostname;
   }
}