Question

How to add key value to HashMap in Java

Answer 1

import java.util.Map.Entry;
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);
        hashmap.put("swift", 5);

        for (Entry<String, Integer> pair : hashmap.entrySet()) {
            System.out.println(pair.getKey() + " : " + pair.getValue());
        }
    }
}



/*
run:

c++ : 3
python : 4
java : 1
c : 2
swift : 5

*/

 

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