Here you can find the source of isNotEmpty(List list)
public static boolean isNotEmpty(List list)
//package com.java2s; /**//from w w w .j a v a2 s . com * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ import java.util.List; public class Main { public static boolean isNotEmpty(List list) { boolean isNotEmpty = false; if ((list != null) && (!list.isEmpty())) { isNotEmpty = true; } return isNotEmpty; } public static boolean isEmpty(List list) { boolean isEmpty = true; if ((list != null) && (!list.isEmpty())) { isEmpty = false; } return isEmpty; } }