Here you can find the source of toObjectArray(Collection
public static Object[] toObjectArray(Collection<Object> list)
//package com.java2s; /* ***** BEGIN LICENSE BLOCK ***** * * This file is part of Weave./* w w w. j av a 2s .com*/ * * The Initial Developer of Weave is the Institute for Visualization * and Perception Research at the University of Massachusetts Lowell. * Portions created by the Initial Developer are Copyright (C) 2008-2015 * the Initial Developer. All Rights Reserved. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. * * ***** END LICENSE BLOCK ***** */ import java.util.Collection; public class Main { public static Object[] toObjectArray(Collection<Object> list) { Object[] array = new Object[list.size()]; int i = 0; for (Object value : list) array[i++] = value; return array; } }