tranItem.add(itemName);
if(hash.containsKey(itemName)){
hash.get(itemName).incrementSupport();
}
else{
hash.put(itemName, new FrequentItem(itemName,1));
}
}
}
List<FrequentItem> sorted = Collections.list(Collections.enumeration(hash.values()));
Collections.sort(sorted, new Comparator<FrequentItem>() {