Here you can find the source of reverseOrder(List list)
public static List reverseOrder(List list)
//package com.java2s; /*/*from w w w .j ava2 s . c om*/ Strandz LGPL - an API that matches the user to the data. Copyright (C) 2007 Chris Murphy Strandz LGPL is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA The authors can be contacted via www.strandz.org */ import java.util.Collections; import java.util.List; public class Main { /** * The same list that has come in as a parameter is returned. */ public static List reverseOrder(List list) { Collections.sort(list, Collections.reverseOrder()); return list; } }