Here you can find the source of getLocalAddress(int port)
public static InetSocketAddress getLocalAddress(int port) throws UnknownHostException
//package com.java2s; /**//w ww.j a va 2 s.c o m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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; import java.net.InetSocketAddress; import java.net.UnknownHostException; public class Main { public static InetSocketAddress getLocalAddress(int port) throws UnknownHostException { String hostInfo = null; try { hostInfo = InetAddress.getLocalHost().getHostName(); InetAddress.getByName(hostInfo); return new InetSocketAddress(hostInfo, port); } catch (UnknownHostException e) { } return new InetSocketAddress(InetAddress.getLocalHost().getHostAddress(), port); } }