<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.4</version> </dependency> import org.apache.commons.collections4.MapUtils; public class MapExample { public static void main(String[] args) { Map<String, Integer> map = MapUtils.emptyMap(); map.put("apple", 10); map.put("orange", 5); map.put("banana", 7); int appleQuantity = MapUtils.getIntValue(map, "apple"); boolean isEmpty = MapUtils.isEmpty(map); } }