Here you can find the source of createTagList(List
public static String createTagList(List<String> tags, String separator)
//package com.java2s; /**//from ww w. j a v a 2 s. c o m * ?Copyright (C) 2015 - 2015 52?North Initiative for Geospatial Open Source * Software GmbH * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * If the program is linked with libraries which are licensed under one of * the following licenses, the combination of the program with the linked * library is not considered a "derivative work" of the program: * * - Apache License, version 2.0 * - Apache Software License, version 1.0 * - GNU Lesser General Public License, version 3 * - Mozilla Public License, versions 1.0, 1.1 and 2.0 * - Common Development and Distribution License (CDDL), version 1.0 * * Therefore the distribution of the program linked with libraries licensed * under the aforementioned licenses, is permitted by the copyright holders * if the distribution is compliant with both the GNU General Public * license version 2 and the aforementioned licenses. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General * Public License for more details. */ import java.util.List; public class Main { public static String createTagList(List<String> tags, String separator) { StringBuilder sb = new StringBuilder(); for (String string : tags) { sb.append(string); sb.append(separator); } return sb.toString().substring(0, sb.length() - separator.length()); } }