Java – Check if a particular value exists in HashMap example

In this example we are checking whether a particular value exists in HashMap or not. We will be using containsValue() method of HashMap class to perform this check:

public boolean containsValue(Object value): Returns true if this map maps one or more keys to the specified value.

Complete Code:

Here we have a HashMap of integer keys and String values, we are checking whether a particular String is mapped to any of the key of HashMap.

import java.util.HashMap;

public class CheckValueExample {
 
 public static void main(String[] args) {
 
    // Creating a HashMap of int keys and String values
    HashMap<Integer, String> hashmap = new HashMap<Integer, String>();
 
    // Adding Key and Value pairs to HashMap
    hashmap.put(11,"Chaitanya");
    hashmap.put(22,"Pratap");
    hashmap.put(33,"Singh");
    hashmap.put(44,"Rajesh");
    hashmap.put(55,"Kate");
 
    // Checking Value Existence
    boolean flag = hashmap.containsValue("Singh");
    System.out.println("String Singh exists in HashMap? : " + flag);
 }
}

Output:

String Singh exists in HashMap? : true