Java tutorial
//package com.java2s; /** * Copyright 2013 MegaFon * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.util.Collection; import java.util.Map; public class Main { /** * Checks if collection is null or empty * * @param source collection to check * @return true if collection is null or empty */ public static boolean isEmpty(Collection<?> source) { return source == null || source.size() == 0; } /** * Checks if map is null or empty * * @param source map to check * @return true if map is null or empty */ private static boolean isEmpty(Map source) { return source == null || source.isEmpty(); } }