Here you can find the source of join(String[] array, String delimiter)
public static String join(String[] array, String delimiter)
//package com.java2s; /*/*w ww. j a v a2 s. c om*/ * Created on 24-Nov-2003 at 14:38:43 * * Copyright (c) 2004-2005 Robert Virkus / Enough Software * * This file is part of J2ME Polish. * * J2ME Polish 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 of the License, or * (at your option) any later version. * * J2ME Polish 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 J2ME Polish; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Commercial licenses are also available, please * refer to the accompanying LICENSE.txt or visit * http://www.j2mepolish.org for details. */ import java.util.Iterator; import java.util.List; public class Main { public static String join(String[] array, String delimiter) { StringBuffer sb = new StringBuffer(); if (array.length != 0) { sb.append(array[0]); } for (int i = 1; i < array.length; i++) { sb.append(delimiter); sb.append(array[i]); } return sb.toString(); } /** * Takes a list and returns a space separated string with the string values of each list element. * * @param arguments a list with objects * @return all objects in a string */ public static String toString(List arguments) { StringBuffer buffer = new StringBuffer(); for (Iterator iter = arguments.iterator(); iter.hasNext();) { String element = iter.next().toString(); buffer.append(element); if (iter.hasNext()) { buffer.append(' '); } } return buffer.toString(); } }