Here you can find the source of concat(List
public static String concat(List<String> items, String quotation, String separation)
//package com.java2s; /****************************************************************************** * Copyright (C) 2009-2015 BIMserver.org * /*from ww w .j av a2 s.c om*/ * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. *****************************************************************************/ import java.util.List; public class Main { public static String concat(List<String> items, String quotation, String separation) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < items.size(); i++) { sb.append(quotation + items.get(i) + quotation); if (i < items.size() - 1) { sb.append(separation); } } return sb.toString(); } }