Java Local Host Get getLocalHostName()

Description

get Local Host Name

License

LGPL

Declaration

public static String getLocalHostName() 

Method Source Code

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1/*w w  w .  j  a  v a  2s.c o  m*/
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at http://sourceforge.net/projects/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * TIANI Medgraph AG.
 * Portions created by the Initial Developer are Copyright (C) 2002-2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Gunter Zeilinger <gunter.zeilinger@tiani.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

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

public class Main {
    private static String localHostName = null;
    private static String localHostAddress = null;

    public static String getLocalHostName() {
        if (localHostName == null) {
            init();
        }
        return localHostName;
    }

    private static void init() {
        try {
            InetAddress ia = InetAddress.getLocalHost();
            localHostName = skipDomain(ia.getHostName());
            localHostAddress = ia.getHostAddress();
        } catch (UnknownHostException e) {
            localHostName = "localhost";
            localHostAddress = "127.0.0.1";
        }
    }

    public static String skipDomain(String fqdn) {
        if (Character.isDigit(fqdn.charAt(0))) {
            return fqdn;
        }
        int pos = fqdn.indexOf('.');
        return pos == -1 ? fqdn : fqdn.substring(0, pos);
    }
}

Related

1. getLocalHostAddress()
2. getLocalhostAddress()
3. getLocalHostID()
4. getLocalHostLANAddress()
5. getLocalHostName()
6. getLocalHostName()
7. getLocalHostName()
8. getLocalHostName()
9. getLocalHostName()