AbstractMap isEmpty() Method in Java with Examples Last Updated : 26 Oct, 2018 Comments Improve Suggest changes Like Article Like Report The AbstractMap.isEmpty() method of AbstractMap class is used to check for the emptiness of the map. The method returns True if no key-value pair or mapping is present in the map else False. Syntax: AbstractMap.isEmpty() Parameters: The method does not take any parameters. Return Value: The method returns boolean true if the map is empty or does not contain any mapping pairs else boolean false. Below programs illustrates the working of AbstractMap.isEmpty() method: Program 1: Mapping String Values to Integer Keys. Java // Java code to illustrate the isEmpty() method import java.util.*; public class AbstractMap_Demo { public static void main(String[] args) { // Creating an empty AbstractMap AbstractMap<String, Integer> abs_map = new HashMap<String, Integer>(); // Mapping int values to string keys abs_map.put("Geeks", 10); abs_map.put("4", 15); abs_map.put("Geeks", 20); abs_map.put("Welcomes", 25); abs_map.put("You", 30); // Displaying the AbstractMap System.out.println("The Mappings are: " + abs_map); // Checking for the emptiness of Map System.out.println("Is the map empty? " + abs_map.isEmpty()); } } Output: The Mappings are: {4=15, Geeks=20, You=30, Welcomes=25} Is the map empty? false Program 2: For an empty HashMap Java // Java code to illustrate the isEmpty() method import java.util.*; public class Abstract_Map_Demo { public static void main(String[] args) { // Creating an empty AbstractMap AbstractMap<String, Integer> abs_map = new HashMap<String, Integer>(); // Displaying the AbstractMap System.out.println("The Mappings are: " + abs_map); // Checking for the emptiness of Map System.out.println("Is the map empty? " + abs_map.isEmpty()); } } Output: The Mappings are: {} Is the map empty? true Note: The same operation can be performed with any type of Mappings with variation and combination of different data types. Comment More infoAdvertise with us Next Article AbstractMap isEmpty() Method in Java with Examples chinmoy lenka Follow Improve Article Tags : Misc Java Java-Collections Java - util package Java-Functions Java-AbstractMap +2 More Practice Tags : JavaJava-CollectionsMisc Similar Reads AbstractSet isEmpty() method in Java with Example The isEmpty() method of AbstractSet in Java is used to check whether this AbstractSet is empty or not. It returns an boolean value stating the same. Syntax: public boolean isEmpty() Parameters: This function has no parameters. Returns: The method returns an boolean value which states that this insta 2 min read ArrayList isEmpty() Method in Java with Examples In Java, the isEmpty() method of ArrayList is used to check if an ArrayList is empty.Example 1: Here, we use the isEmpty() method to check whether an ArrayList of integers is empty.Java// Java program to demonstrate the use of isEmpty() // method with ArrayList of Integers import java.util.ArrayList 2 min read AbstractCollection isEmpty() Method in Java with Examples The isEmpty() method of Java AbstractCollection is used to check and verify if a Collection is empty or not. It returns True if the Collection is empty else it returns False. Syntax: AbstractCollection.isEmpty() Parameters: The method does not take any parameter. Return Value: The function returns T 2 min read AbstractSequentialList isEmpty() method in Java with Example The isEmpty() method of AbstractSequentialList in Java is used to check whether this AbstractSequentialList is empty or not. It returns an boolean value stating the same. Syntax: public boolean isEmpty() Parameters: This function has no parameters. Returns: The method returns an boolean value which 2 min read CompositeName isEmpty() method in Java with Examples The isEmpty() method of a javax.naming.CompositeName class is used to check this composite name object is empty or not. A composite name is said to be empty if it has zero components. Syntax: public boolean isEmpty() Parameters: This method accepts nothing. Return value: This method returns true if 1 min read Like