Java tutorial
//package com.java2s; import java.util.Collection; import java.util.Map; public class Main { public static <T> boolean isNotEmpty(Collection<T> list) { return !isEmpty(list); } public static boolean isNotEmpty(Map<?, ?> map) { return !isEmpty(map); } public static <T> boolean isEmpty(Collection<T> list) { return list == null || list.isEmpty(); } public static boolean isEmpty(Map<?, ?> map) { return map == null || map.isEmpty(); } }