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:

// 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); 
    } 
} 

Output:

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

Program 2:

// 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); 
    } 
} 

Output:

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

My Personal Notes

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