Here you can find the source of isLinkLocalNetwork(InetAddress addr)
public static boolean isLinkLocalNetwork(InetAddress addr)
//package com.java2s; /*/*from w ww . j av a 2 s . co m*/ * Copyright (c) 1998-2015 Caucho Technology -- all rights reserved * * This file is part of Baratine(TM)(TM) * * Each copy or derived work must preserve the copyright notice and this * notice unmodified. * * Baratine 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 2 of the License, or * (at your option) any later version. * * Baratine 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, or any warranty * of NON-INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with Baratine; if not, write to the * Free Software Foundation, Inc. * 59 Temple Place, Suite 330 * Boston, MA 02111-1307 USA * * @author Scott Ferguson */ import java.net.InetAddress; public class Main { public static boolean isLinkLocalNetwork(InetAddress addr) { byte[] bytes = addr.getAddress(); if (bytes.length != 4) return false; if ((bytes[0] & 0xff) == 169 && (bytes[1] & 0xff) == 254) return true; return false; } }