Question

How to print HashMap keys and values in Java

Answer 1

import java.util.HashMap;

public class MyClass {
    public static void main(String[] args) {

        HashMap<Integer, String> hmap = new HashMap<Integer, String>();

        hmap.put(1, "Darth Vader");
        hmap.put(5, "Luke Skywalker");
        hmap.put(7, "Obi-Wan Kenobi");
        hmap.put(2, "Han Solo");

        for (Integer i : hmap.keySet()) {            
              System.out.println("key: " + i + " value: " + hmap.get(i));
        }
    }
}



/*
run:

key: 1 value: Darth Vader
key: 2 value: Han Solo
key: 5 value: Luke Skywalker
key: 7 value: Obi-Wan Kenobi

*/

 

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