Here you can find the source of noneOf( Class
public static final <E extends Enum<E>> EnumSet<E> noneOf( Class<E> elementType)
//package com.java2s; /**// w w w . j a v a 2 s . c o m * SqlJetUtility.java * Copyright (C) 2009-2010 TMate Software Ltd * * 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; version 2 of the License. * * 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. * * For information on how to redistribute this software under * the terms of a license other than GNU General Public License * contact TMate Software at support@sqljet.com */ import java.util.EnumSet; public class Main { public static final <E extends Enum<E>> EnumSet<E> noneOf( Class<E> elementType) { return EnumSet.noneOf(elementType); } }