Here you can find the source of join(Collection
Parameter | Description |
---|---|
collection | the collection of strings to join |
separator | the string to use as a separator |
public static String join(Collection<String> collection, String separator)
//package com.java2s; /*//from w ww. jav a 2s. c o m * MIT License * Copyright (c) 2016 Estonian Information System Authority (RIA) * * 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.Collection; import java.util.Iterator; public class Main { /** * Joins the collection of strings into a single string using the specified string as a separator. * * @param collection the collection of strings to join * @param separator the string to use as a separator * @return the resulting string */ public static String join(Collection<String> collection, String separator) { StringBuilder sb = new StringBuilder(); Iterator<String> it = collection.iterator(); while (it.hasNext()) { sb.append(it.next()); if (it.hasNext()) { sb.append(separator); } } return sb.toString(); } }