Here you can find the source of getIP(InetAddress ip)
public static long getIP(InetAddress ip)
//package com.java2s; /*/*from w w w .java2s.c o m*/ * Copyright @ 2006-2010 by The Jxva Framework Foundation * * 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; public class Main { public static long getIP(InetAddress ip) { byte[] b = ip.getAddress(); return b[0] << 24L & 0xff000000L | b[1] << 16L & 0xff0000L | b[2] << 8L & 0xff00 | b[3] << 0L & 0xff; } }