Here you can find the source of toCollection(final T[] elements)
public static <T> Collection<T> toCollection(final T[] elements)
//package com.java2s; /*//from ww w .j a v a 2 s . c o m This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Copyright (C) 2007 Marco Aurelio Graciotto Silva <magsilva@ironiacorp.com> */ import java.util.ArrayList; import java.util.Collection; import java.util.List; public class Main { /** * Create a collection using an array. */ public static <T> Collection<T> toCollection(final T[] elements) { final List<T> result = new ArrayList<T>(); for (T element : elements) { result.add(element); } return result; } }