Java tutorial
//package com.java2s; /* * Copyright (C) 2009 Roman Masek * * This file is part of OpenSudoku. * * OpenSudoku 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 3 of the License, or * (at your option) any later version. * * OpenSudoku 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 OpenSudoku. If not, see <http://www.gnu.org/licenses/>. * */ import java.util.Collection; import java.util.Iterator; public class Main { public static String join(Collection<?> s, String delimiter) { StringBuilder builder = new StringBuilder(); Iterator<?> iter = s.iterator(); while (iter.hasNext()) { builder.append(iter.next()); if (iter.hasNext()) { builder.append(delimiter); } } return builder.toString(); } }