Iterating over hashmap using Iterator

 

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

public class HashMapIteration3 {

public static void main(String[] args) {

//Creating HashMap;

Map<Integer, String> hm = new HashMap<>();

//Putting element

hm.put(1, "Naidu");

hm.put(3, "Rohilla");

hm.put(5, "Vijay");

hm.put(2, "Rahul");

hm.put(4, "Ramakesh");

hm.put(6, "Sudeep");

//Storing null value

hm.put(null, null);

System.out.println("Iterating HashMap Using For each loop");

Iterator<Map.Entry<Integer,String>> itr = hm.entrySet().iterator();

while (itr.hasNext()) {

HashMap.Entry<Integer, String> entry = itr.next();

System.out.println(

"Key = " + entry.getKey() + " " + "Value = " + entry.getValue()

);

}

}

}