Java tutorial
//package com.java2s; /* * JwIUtils - Utility Library for Java <https://github.com/JonathanxD/> * * The MIT License (MIT) * * Copyright (c) 2017 TheRealBuggy/JonathanxD (https://github.com/JonathanxD/) <jonathan.scripter@programmer.net> * Copyright (c) contributors * * * 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.Collections; import java.util.function.Supplier; public class Main { /** * Create a {@link Collection} of {@link E} and add {@code elements} to the {@link Collection}. * * @param factory Collection factory method. * @param elements Elements to add to collection. * @param <E> Element type. * @param <T> Collection type. * @return {@link T Collection} of {@link E} with {@code elements}. */ @SafeVarargs public static <E, T extends Collection<E>> T collectionOf(Supplier<T> factory, E... elements) { T collection = factory.get(); Collections.addAll(collection, elements); return collection; } }