HashMap get() Method in Java Last Updated : 04 Jan, 2025 Comments Improve Suggest changes Like Article Like Report The java.util.HashMap.get() method of HashMap class is used to retrieve or fetch the value mapped by a particular key mentioned in the parameter. It returns NULL when the map contains no such mapping for the key. Syntax:Hash_Map.get(Object key_element)Parameter: The method takes one parameter key_element of object type and refers to the key whose associated value is supposed to be fetched. Return Value: The method returns the value associated with the key_element in the parameter. Below programs illustrates the working of java.util.HashMap.get() method: Now, let's discuss some programs for it:Program 1: Mapping String Values to Integer Keys. Java // Java code to illustrate the get() method import java.util.*; public class Hash_Map_Demo { public static void main(String[] args) { // Creating an empty HashMap HashMap<Integer, String> hash_map = new HashMap<Integer, String>(); // Mapping string values to int keys hash_map.put(10, "Geeks"); hash_map.put(15, "4"); hash_map.put(20, "Geeks"); hash_map.put(25, "Welcomes"); hash_map.put(30, "You"); // Displaying the HashMap System.out.println("Initial Mappings are: " + hash_map); // Getting the value of 25 System.out.println("The Value is: " + hash_map.get(25)); // Getting the value of 10 System.out.println("The Value is: " + hash_map.get(10)); } } OutputInitial Mappings are: {20=Geeks, 25=Welcomes, 10=Geeks, 30=You, 15=4} The Value is: Welcomes The Value is: Geeks Program 2: Mapping Integer Values to String Keys. Java // Java code to illustrate the get() method import java.util.*; public class Hash_Map_Demo { public static void main(String[] args) { // Creating an empty HashMap HashMap<String, Integer> hash_map = new HashMap<String, Integer>(); // Mapping int values to string keys hash_map.put("Geeks", 10); hash_map.put("4", 15); hash_map.put("Geeks", 20); hash_map.put("Welcomes", 25); hash_map.put("You", 30); // Displaying the HashMap System.out.println("Initial Mappings are: " + hash_map); // Getting the value of "Geeks" System.out.println("The Value is: " + hash_map.get("Geeks")); // Getting the value of "You" System.out.println("The Value is: " + hash_map.get("You")); } } OutputInitial Mappings are: {4=15, Geeks=20, You=30, Welcomes=25} The Value is: 20 The Value is: 30 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 Java HashMap put() Method chinmoy lenka Follow Improve Article Tags : Misc Java Java-Collections Java - util package Java-Functions Java-HashMap +2 More Practice Tags : JavaJava-CollectionsMisc Similar Reads HashMap in Java In Java, HashMap is part of the Java Collections Framework and is found in the java.util package. It provides the basic implementation of the Map interface in Java. HashMap stores data in (key, value) pairs. Each key is associated with a value, and you can access the value by using the corresponding 15+ min read HashMap clear() Method in Java The clear() method of the HashMap class in Java is used to remove all of the elements or mappings (key-value pairs) from a specified HashMap.Example 2: Here, we will use the clear() method to clear a HashMap of Integer keys and String values. 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