Map hashMap = new HashMap();
// hashMap.put("Alpha", "A");
// hashMap.put("Beta", "B");
// hashMap.put("Gamma", "C");
// hashMap.put("Delta", "D");
Map flatMap = new Flat3Map(hashMap);
System.out.println(flatMap);
Map unmodHashMap = Collections.unmodifiableMap(new HashMap(hashMap));
Map fastHashMap = new FastHashMap(hashMap);
Map treeMap = new TreeMap(hashMap);
Map seqMap = new SequencedHashMap(hashMap);