Here you can find the source of combineNames(Collection
public static String combineNames(Collection<Object> items)
//package com.java2s; /*/* ww w .j a va 2 s .c om*/ * This file is part of UltimateCore, licensed under the MIT License (MIT). * * Copyright (c) Bammerbom * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import java.util.*; public class Main { public static String combineNames(Collection<Object> items) { if ((items == null) || (items.isEmpty())) { return ""; } if (items.size() == 1) { Object item = items.iterator().next(); return item == null ? "" : item.toString(); } StringBuilder rval = new StringBuilder(); int i = 0; for (Iterator<Object> i$ = items.iterator(); i$.hasNext();) { Object item = i$.next(); if (i == items.size() - 1) { rval.append(" and "); } else if (i > 0) { rval.append(", "); } if (item != null) { rval.append(item); } i++; } return rval.toString(); } public static String combineNames(String[] items) { return combineNames(new HashSet<Object>(Arrays.asList(items))); } }