Here you can find the source of formatInetAddr(InetSocketAddress addr)
public static String formatInetAddr(InetSocketAddress addr)
//package com.java2s; /**/*from ww w . j a va2 s.c om*/ * 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.Inet6Address; import java.net.InetAddress; import java.net.InetSocketAddress; public class Main { public static String formatInetAddr(InetSocketAddress addr) { InetAddress ia = addr.getAddress(); if (ia == null) { return String.format("%s:%s", addr.getHostString(), addr.getPort()); } if (ia instanceof Inet6Address) { return String.format("[%s]:%s", ia.getHostAddress(), addr.getPort()); } else { return String.format("%s:%s", ia.getHostAddress(), addr.getPort()); } } }