Here you can find the source of concatWithSeparator(List
public static String concatWithSeparator(List<String> missingParameters, String separator)
//package com.java2s; /*/*w w w .ja va 2 s. c om*/ * Copyright ? 2008, 2012 Pedro Agull? Soliveres. * * This file is part of DirectJNgine. * * DirectJNgine is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License. * * Commercial use is permitted to the extent that the code/component(s) * do NOT become part of another Open Source or Commercially developed * licensed development library or toolkit without explicit permission. * * DirectJNgine 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with DirectJNgine. If not, see <http://www.gnu.org/licenses/>. * * This software uses the ExtJs library (http://extjs.com), which is * distributed under the GPL v3 license (see http://extjs.com/license). */ import java.util.List; public class Main { public static String concatWithSeparator(List<String> missingParameters, String separator) { assert missingParameters != null; assert separator != null; if (missingParameters.isEmpty()) { return ""; } StringBuilder result = new StringBuilder(); for (int i = 0; i < missingParameters.size() - 1; i++) { result.append(missingParameters.get(i)); result.append(separator); } result.append(missingParameters.get(missingParameters.size() - 1)); return result.toString(); } public static boolean isEmpty(String value) { return value == null || value.equals(""); } }