Here you can find the source of getLocalMac()
public static String getLocalMac()
//package com.java2s; /*/* w w w .j a va 2 s .c o m*/ * Copyright (C) 2016 Dmitry Kotlyarov. * All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.net.InetAddress; import java.net.NetworkInterface; public class Main { public static String getLocalMac() { try { NetworkInterface network = NetworkInterface.getByInetAddress(InetAddress.getLocalHost()); byte[] mac = network.getHardwareAddress(); StringBuilder sb = new StringBuilder(); for (int i = 0, ci = mac.length; i < ci; i++) { sb.append(String.format("%02X%s", mac[i], (i < ci - 1) ? "-" : "")); } return sb.toString(); } catch (Exception e) { throw new RuntimeException(e); } } }