import java.util.*;

import java.util.concurrent.*;

public class TraversingConcurrentHashMap {

public static void main(String[] args)

{

// create an instance of ConcurrentHashMap

ConcurrentHashMap<Integer, String> chmap

= new ConcurrentHashMap<Integer, String>();

// Add elements using put()

chmap.put(8, "Third");

chmap.put(6, "Second");

chmap.put(3, "First");

chmap.put(11, "Fourth");

// Create an Iterator over the

// ConcurrentHashMap

Iterator<ConcurrentHashMap.Entry<Integer, String> >

itr = chmap.entrySet().iterator();

// The hasNext() method is used to check if there is

// a next element The next() method is used to

// retrieve the next element

while (itr.hasNext()) {

ConcurrentHashMap.Entry<Integer, String> entry

= itr.next();

System.out.println("Key = " + entry.getKey()

+ ", Value = "

+ entry.getValue());

}

}

}