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EnumMap containsValue(value) method in Java

EnumMap containsKey() Method in Java

Last Updated : 24 Jul, 2020

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The Java.util.EnumMap.containsKey(key) method is used to check whether a specified key mentioned in the parameter is present in this map or not.

Syntax:

boolean containsKey(Object key)

Parameter: The method accepts one parameter key which refer to the key to be verified.

Return Value: The method returns true if the key is present in the EnumMap otherwise it returns false.

Below programs illustrate the containsKey() method:
Program 1:

   // Java program to demonstrate containsKey() method 
import java.util.*; 
  
// An enum of gfg visitors is created 
public enum gfg_visitors { 
    India, 
    United_States, 
    China, 
    Japan, 
    Canada 
}; 
  
class Enum_map { 
    public static void main(String[] args) 
    { 
  
        EnumMap<gfg_visitors, String> mp = new 
        EnumMap<gfg_visitors, String>(gfg_visitors.class); 
  
        // values are associated in mp 
        mp.put(gfg_visitors.India, "61.4%"); 
        mp.put(gfg_visitors.United_States, "18.4%"); 
        mp.put(gfg_visitors.China, "2.5%"); 
        mp.put(gfg_visitors.Japan, "1.1%"); 
        mp.put(gfg_visitors.Canada, "1.1%"); 
  
        // Check if map contains gfg visitor from United_States 
        boolean ans = mp.containsKey(gfg_visitors.United_States); 
  
        // Prints the result 
        System.out.println("gfg_visitors from United States: " + ans); 
    } 
} 
 
  

Output:

  gfg_visitors from United States: true

Program 2:

   // Java program to demonstrate containsKey() method 
import java.util.*; 
  
// An enum of gfg visitors is created 
public enum gfg_visitors { 
    India, 
    United_States, 
    China, 
    Japan, 
    Canada, 
    Russia 
}; 
  
class Enum_map { 
    public static void main(String[] args) 
    { 
  
        EnumMap<gfg_visitors, String> mp = new 
        EnumMap<gfg_visitors, String>(gfg_visitors.class); 
  
        // values are associated in mp 
        mp.put(gfg_visitors.India, "61.4%"); 
        mp.put(gfg_visitors.United_States, "18.4%"); 
        mp.put(gfg_visitors.China, "2.5%"); 
        mp.put(gfg_visitors.Japan, "1.1%"); 
        mp.put(gfg_visitors.Canada, "1.1%"); 
  
        // check if map contains gfg visitor from Russia 
        boolean ans = mp.containsKey(gfg_visitors.Russia); 
  
        // prints the result 
        System.out.println("gfg_visitors from Russia: " + ans); 
    } 
} 
 
  

Output:

  gfg_visitors from Russia: false

EnumMap containsValue(value) method in Java

A

akash1295

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Article Tags :

Java
Java-Collections
Java-EnumMap
Java-Functions

Practice Tags :

Java
Java-Collections

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