Here you can find the source of stringify(List
public static <T> String stringify(List<T> entries)
//package com.java2s; /**//from w w w.ja v a 2 s .c om * Copyright (C) 2011 BonitaSoft S.A. * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2.0 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.List; public class Main { public static <T> String stringify(List<T> entries) { if (entries == null || entries.isEmpty()) { return ""; } StringBuilder stb = new StringBuilder(); for (T entry : entries) { stb.append(String.valueOf(entry)); stb.append(","); } return stb.substring(0, stb.length() - 1); // substring to remove last comma } }