EnumMap size() Method in Java

The Java.util.EnumMap.size() method in java is used to know the size of the map or the number of elements present in the map.

Syntax:

Enum_Map.size()

Parameters: The method does not take any parameters.



Return Value: The method returns the size of the map.

Below programs illustrate the working of size() function:
Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate size()
import java.util.*;
  
// An enum of geeksforgeeks
public enum gfg {
    India_today,
    United_States_today
}
;
  
class Enum_demo {
    public static void main(String[] args)
    {
  
        EnumMap<gfg, Integer> mp = new 
                    EnumMap<gfg, Integer>(gfg.class);
  
        // Values are associated
        mp.put(gfg.India_today, 69);
        mp.put(gfg.United_States_today, 1073);
  
        // Prints the map
        System.out.println("The EnumMap: " + mp);
  
        // Store the size of the map
        int numberOf_kv = mp.size();
  
        // Prints the map_size
        System.out.println("Size of map: " + numberOf_kv);
    }
}

chevron_right






                        filter_none









Output:


The EnumMap: {India_today=69, United_States_today=1073}
Size of map: 2





Program 2:











                                    filter_none




                                    edit

                                    close




                                    play_arrow




                                    link

                                    brightness_4

                                    code
                                




















// Java program to demonstrate size() 


import java.util.*; 


  


// An enum of geeksforgeeks 


public enum gfg { 


  


    India_today, 


    United_States_today 


} 


; 


  


class Enum_demo { 


    public static void main(String[] args) 


    { 


  


        EnumMap<gfg, Integer> mp = new 


                  EnumMap<gfg, Integer>(gfg.class); 


  


        // Values are associated 


        mp.put(gfg.India_today, 69); 


        mp.put(gfg.United_States_today, 1073); 


  


        // Prints the map 


        System.out.println("The EnumMap: " + mp); 


  


        // Remove mapping of this key 


        mp.remove(gfg.United_States_today); 


  


        // Prints the final map 


        System.out.println("The EnumMap: " + mp); 


  


        // Store the size pf map after removal of 


        // The key 


        int numberOf_kv = mp.size(); 


  


        // Prints the map_size 


        System.out.println("Size of map: " + numberOf_kv); 


    } 


} 



















                        chevron_right







                        filter_none









Output:


The EnumMap: {India_today=69, United_States_today=1073}
The EnumMap: {India_today=69}
Size of map: 1






          
          
          
          

            

    

        My Personal Notes
        arrow_drop_up
    

    

        
        

            
            
        

    


Recommended Posts:
Image
akash1295
Check out this Author's contributed articles.
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on  the "Improve Article" button below.