Just for comparison sake.

HashMapDemo.java

// Two ways just how to iterate a HashMap. Getting my hands dirty with Java :P
import java.util.*;
 
class Demo
{
    public static void main(String[] args)
    {
        Map<String, String> dataSet = new HashMap<String, String>();

        dataSet.put("Chennai", "Banglore");
        dataSet.put("Bombay", "Delhi");
        dataSet.put("Goa", "Chennai");
        dataSet.put("Delhi", "Goa");

        for (Map.Entry<String,String> entry: dataSet.entrySet())   
           System.out.println(" Key " + entry.getKey() + " Value " + entry.getValue() + "   ");
            
        System.out.println("");
        
        // Get a set of the entries
        Set set = dataSet.entrySet();

        // Get an iterator
        Iterator i = set.iterator();

        // Display elements
        while(i.hasNext()) {
           Map.Entry me = (Map.Entry)i.next();
           System.out.println(" Key " + me.getKey() + " Value " + me.getValue() + "   ");
        }
        System.out.println();
    }
 }