Question

How to check if value exists in HashMap with Java

Answer 1

import java.util.HashMap;

public class MyClass {
    public static void main(String args[]) {
        HashMap<String, Integer> hashmap = new HashMap<>();

        hashmap.put("java", 1);
        hashmap.put("c", 2);
        hashmap.put("c++", 3);
        hashmap.put("python", 4);

        if (hashmap.containsValue(1)) {
            System.out.println("found");
        }
        if (!hashmap.containsValue(98)) {
            System.out.println("not found");
        }
    }
}



/*
run:

found
not found

*/

 

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