Java Examples - Iterate through HashMap


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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

java_collections.htm

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