Here you can find the source of getInt32FromAddress(Inet4Address inetAddress)
public static long getInt32FromAddress(Inet4Address inetAddress)
//package com.java2s; /*/*from w ww . j av a 2 s . co m*/ * OpenFire - a Java API to access the XFire instant messaging network. * Copyright (C) 2007 Iain McGinniss * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * This library 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 * Lesser General Public License for more details. * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ import java.net.Inet4Address; public class Main { public static long getInt32FromAddress(Inet4Address inetAddress) { byte[] addrBytes = inetAddress.getAddress(); return ((long) convertByteToUnsigned(addrBytes[0]) << 24L) | ((long) convertByteToUnsigned(addrBytes[1]) << 16L) | ((long) convertByteToUnsigned(addrBytes[2]) << 8L) | (convertByteToUnsigned(addrBytes[3])); } public static int convertByteToUnsigned(byte b) { return b & 0xFF; } }