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LinkedHashMap get() Method in Java with Examples

  • Last Updated : 17 Nov, 2021

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: 

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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 classes
import java.util.*;
  
// Main class
public 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 classes
import java.util.*;
  
// Main class
public 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.




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