Here you can find the source of ipToLong(byte[] octets)
public static long ipToLong(byte[] octets)
//package com.java2s; /**/* www .jav a 2 s . c o m*/ * <a href="http://www.openolat.org"> * OpenOLAT - Online Learning and Training</a><br> * <p> * Licensed under the Apache License, Version 2.0 (the "License"); <br> * you may not use this file except in compliance with the License.<br> * You may obtain a copy of the License at the * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a> * <p> * Unless required by applicable law or agreed to in writing,<br> * software distributed under the License is distributed on an "AS IS" BASIS, <br> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br> * See the License for the specific language governing permissions and <br> * limitations under the License. * <p> * Initial code contributed and copyrighted by<br> * frentix GmbH, http://www.frentix.com * <p> */ public class Main { public static long ipToLong(byte[] octets) { long result = 0; for (byte octet : octets) { result <<= 8; result |= octet & 0xff; } return result; } }