Here you can find the source of getHostIpAddress()
public static String getHostIpAddress()
//package com.java2s; /**/* w w w. j a v a 2 s. c o m*/ * Copyright 2012 55 Minutes (http://www.55minutes.com) * * 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 { /** * Returns the IP address hosting this JVM, or {@code null} if it could * not be determined. */ public static String getHostIpAddress() { try { InetAddress host = InetAddress.getLocalHost(); return host.getHostAddress(); } catch (Exception ex) { // ignore } return null; } }