Java Host Address Get getHostnameOrAddress()

Description

get Hostname Or Address

License

Open Source License

Declaration

public static String getHostnameOrAddress() 

Method Source Code

//package com.java2s;
/* This file is part of VoltDB.
 * Copyright (C) 2008-2010 VoltDB L.L.C.
 *
 * VoltDB is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version./*from   ww  w.j a v  a 2 s.c om*/
 *
 * VoltDB 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with VoltDB.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.net.Inet4Address;
import java.net.InetAddress;

import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;

import java.util.Enumeration;

public class Main {
    public static String getHostnameOrAddress() {
        try {
            final InetAddress addr = InetAddress.getLocalHost();
            return addr.getHostName();
        } catch (UnknownHostException e) {
            try {
                Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
                if (interfaces == null) {
                    return "";
                }
                NetworkInterface intf = interfaces.nextElement();
                Enumeration<InetAddress> addresses = intf.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress address = addresses.nextElement();
                    if (address instanceof Inet4Address) {
                        return address.getHostAddress();
                    }
                }
                interfaces = NetworkInterface.getNetworkInterfaces();
                while (addresses.hasMoreElements()) {
                    return addresses.nextElement().getHostAddress();
                }
                return "";
            } catch (SocketException e1) {
                return "";
            }
        }
    }
}

Related

1. getHostName(String addr)
2. getHostName(String address)
3. getHostName(String address)
4. getHostName(String localAddress)
5. getHostnameOrAddress()
6. getHostNameOrAddress(String host)