Java tutorial
//package com.java2s; /* * Copyright (C) 2013 4th Line GmbH, Switzerland * * The contents of this file are subject to the terms of either the GNU * Lesser General Public License Version 2 or later ("LGPL") or the * Common Development and Distribution License Version 1 or later * ("CDDL") (collectively, the "License"). You may not use this file * except in compliance with the License. See LICENSE.txt for more * information. * * This program 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. */ import java.net.NetworkInterface; import java.util.Collections; import java.util.Enumeration; public class Main { /** * @return The MAC hardware address of the first network interface of this host. */ public static byte[] getFirstNetworkInterfaceHardwareAddress() { try { Enumeration<NetworkInterface> interfaceEnumeration = NetworkInterface.getNetworkInterfaces(); for (NetworkInterface iface : Collections.list(interfaceEnumeration)) { if (!iface.isLoopback() && iface.isUp() && iface.getHardwareAddress() != null) { return iface.getHardwareAddress(); } } } catch (Exception ex) { throw new RuntimeException("Could not discover first network interface hardware address"); } throw new RuntimeException("Could not discover first network interface hardware address"); } }