Here you can find the source of getGlobalI()
private static InetAddress[] getGlobalI() throws SocketException
//package com.java2s; /*/*from w w w . ja v a 2s. c om*/ * Copyright Ericsson AB 2011-2014. All Rights Reserved. * * The contents of this file are subject to the Lesser GNU Public License, * (the "License"), either version 2.1 of the License, or * (at your option) any later version.; you may not use this file except in * compliance with the License. You should have received a copy of the * License along with this software. If not, it can be * retrieved online at https://www.gnu.org/licenses/lgpl.html. Moreover * it could also be requested from Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO * WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. * EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR * OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND, * EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE * LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, * YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. * * IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING * WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR * REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU FOR * DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL * DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE LIBRARY * (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED * INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE * OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH * HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * */ import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.ArrayList; import java.util.Enumeration; public class Main { private static InetAddress[] getGlobalI() throws SocketException { final ArrayList<InetAddress> inetAddrList = new ArrayList(); Enumeration<NetworkInterface> eNetIf = NetworkInterface.getNetworkInterfaces(); while (eNetIf.hasMoreElements()) { Enumeration<InetAddress> eInetAddr = eNetIf.nextElement().getInetAddresses(); while (eInetAddr.hasMoreElements()) { InetAddress inetAddr = eInetAddr.nextElement(); if (!inetAddr.isAnyLocalAddress() && !inetAddr.isLinkLocalAddress() && !inetAddr.isLoopbackAddress() && !inetAddr.isMulticastAddress()) { inetAddrList.add(inetAddr); } } } return inetAddrList.toArray(new InetAddress[inetAddrList.size()]); } }