In Java, get() method of LinkedHashMap 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.
--> java.util Package
--> LinkedHashMap Class
--> get() Method
Syntax:
Linked_Hash_Map.get(Object key_element)
Parameter: One parameter key_element of object type and refers to the key whose associated value is supposed to be fetched.
Return Type: Value associated with the key_element in the parameter.
Example 1: Mapping String Values to Integer Keys.
Java
// Java Program to illustrate get() method// of LinkedHashMap// Mapping String Values to Integer Keys // Importing required classesimport java.util.*; // Main classpublic class GFG { // Main driver method public static void main(String[] args) { // Creating an empty HashMap LinkedHashMap<Integer, String> li_hash_map = new LinkedHashMap<Integer, String>(); // Mapping string values to int keys // using put() method li_hash_map.put(10, "Geeks"); li_hash_map.put(15, "4"); li_hash_map.put(20, "Geeks"); li_hash_map.put(25, "Welcomes"); li_hash_map.put(30, "You"); // Printing all elements of LinkedHashMap System.out.println("Initial Mappings are: " + li_hash_map); // Getting the value of 25 System.out.println("The Value is: " + li_hash_map.get(25)); // Getting the value of 10 System.out.println("The Value is: " + li_hash_map.get(10)); }} |
Output:
Initial Mappings are: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}
The Value is: Welcomes
The Value is: Geeks
Example 2: Mapping Integer Values to String Keys
Java
// Java Program to Illustrate get() method// Mapping Integer Values to String Keys // Importing required classesimport java.util.*; // Main classpublic class Linked_Hash_Map_Demo { // Main driver method public static void main(String[] args) { // Creating an empty LinkedHashMap LinkedHashMap<String, Integer> li_hash_map = new LinkedHashMap<String, Integer>(); // Mapping int values to string keys // using put() method li_hash_map.put("Geeks", 10); li_hash_map.put("4", 15); li_hash_map.put("Geeks", 20); li_hash_map.put("Welcomes", 25); li_hash_map.put("You", 30); // Printing all elements of LinkedHashMap System.out.println("Initial Mappings are: " + li_hash_map); // Getting the value of "Geeks" System.out.println("The Value is: " + li_hash_map.get("Geeks")); // Getting the value of "You" System.out.println("The Value is: " + li_hash_map.get("You")); }} |
Output:
Initial Mappings are: {Geeks=20, 4=15, Welcomes=25, You=30}
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.
