Java tutorial
//package com.java2s; /** * * Copyright 2016-2016 spccold * * 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 { public static boolean isEmpty(Collection<?> coll) { return (null == coll || coll.isEmpty()); } public static boolean isEmpty(Map<?, ?> map) { return (map == null || map.isEmpty()); } }