Java - Various ways to iterate a Map (Hashtable, HashMap, TreeMap, LinkedHashMap)

IterateMap.java

import java.util.Collection;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class IterateMap {

  public static void main(String[] args) {

		Map<String, String> colorCode = new Hashtable<String, String>();

		colorCode.put("Red", "FF0000");
		colorCode.put("Blue", "0000FF");
		colorCode.put("Green", "008000");
		colorCode.put("Black", "000000");
		colorCode.put("White", "FFFFFF");

		System.out.println("method 1 - Using Iterator");

		Set<String> lSet = colorCode.keySet();
		Iterator<String> itr1 = lSet.iterator();
		while (itr1.hasNext()) {
			String key = itr1.next();
			System.out.println(key + " " + colorCode.get(key));
		}

		System.out.println("method 2 - Using Enumeration for Hashtable");

		Enumeration<String> enu1 = ((Hashtable) colorCode).keys();
		while (enu1.hasMoreElements()) {
			String key = enu1.nextElement();
			System.out.println(key + " " + colorCode.get(key));
		}

		System.out.println("method 3 - Using Collection");
		Collection<String> col = colorCode.values();
		Iterator<String> itr2 = col.iterator();// obtain an Iterator for Collection
		while (itr2.hasNext()) {
			System.out.println(itr2.next());
		}

		System.out.println("method 4 - Using Enumeration only values");

		Enumeration<String> enu2 = ((Hashtable) colorCode).elements();
		while (enu2.hasMoreElements()) {
			System.out.println(enu2.nextElement());
		}

	}

}