Java tutorial
//package com.java2s; /* * Copyright (c) 2016 Catavolt Inc. All rights reserved. * * This file is part of Ozy. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.util.ArrayList; import java.util.List; public class Main { /** * Return a new list with element prepended to previous list. */ public static <A> List<A> prependToList(A elem, List<A> list) { List<A> answer = new ArrayList<A>(list.size() + 1); answer.add(elem); answer.addAll(list); return answer; } }