Here you can find the source of ListToString(List
private static String ListToString(List<String> value, String delimiter)
//package com.java2s; /*//from ww w . ja va2s .c om * DBeaver - Universal Database Manager * Copyright (C) 2010-2016 Serge Rieder (serge@jkiss.org) * * 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. * * 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. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ import java.util.List; public class Main { private static String ListToString(List<String> value, String delimiter) { StringBuilder sbResult = new StringBuilder(); for (String o : value) { sbResult.append(o.trim()); if (delimiter != null && !delimiter.isEmpty()) sbResult.append(delimiter); } return sbResult.toString(); } }