Here you can find the source of collectionToString(final Collection> elements, final String separator)
public static String collectionToString(final Collection<?> elements, final String separator)
//package com.java2s; /*//from w w w.j a v a2 s . c o m * Copyright (c) 2011 PonySDK * Owners: * Luciano Broussal <luciano.broussal AT gmail.com> * Mathieu Barbier <mathieu.barbier AT gmail.com> * Nicolas Ciaravola <nicolas.ciaravola.pro AT gmail.com> * * WebSite: * http://code.google.com/p/pony-sdk/ * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ import java.util.Collection; import java.util.Iterator; public class Main { public static String collectionToString(final Collection<?> elements, final String separator) { String result = ""; final Iterator<?> iterator = elements.iterator(); while (iterator.hasNext()) { final Object object = iterator.next(); result += object.toString(); if (iterator.hasNext()) result += separator; } return result; } }