How to iterate through elements of HashMap in Java

Problem Description

How to iterate through elements of HashMap?

Solution

Following example uses iterator Method of Collection class to iterate through the HashMap.

import java.util.*;

public class Main {
   public static void main(String[] args) {
      HashMap< String, String> hMap = new HashMap< String, String>();
      hMap.put("1", "1st");
      hMap.put("2", "2nd");
      hMap.put("3", "3rd");
      Collection cl = hMap.values();
      Iterator itr = cl.iterator();
      
      while (itr.hasNext()) {
         System.out.println(itr.next());
      }
   }
}

Result

The above code sample will produce the following result.

1st
2nd
3rd