问将HashMap整数与arrayList int进行比较不知何故并不总是有效的。

EN

`@Override
public HashMap<Integer, Integer> populate(int roomId){
    ArrayList<Item> original = items.populateTable(roomId);
    HashMap<Integer, Integer> refined = new HashMap<>();
    for(int i = 1; i < original.size(); i++){
        Iterator it = refined.entrySet().iterator();
        refined.put(original.get(0).getStockId(), 1); // put the first item in the hashMap
        while(it.hasNext()){
            Map.Entry pair = (Map.Entry)it.next();
            if( pair.getKey().equals( original.get(i).getStockId() ) ) //if item is not in hashMap
            {
                System.out.println(pair.getKey()+"++");
                refined.put(original.get(i).getStockId(), refined.get(original.get(i).getStockId()) + 1); //increment the value
            }
            else{
                System.out.println("NEW:"+pair.getKey());
                refined.put(original.get(i).getStockId(), 1); // add it to hashMap
            }
        }
    }
    Iterator it1 = refined.entrySet().iterator();
    while(it1.hasNext()){
        Map.Entry pair1 = (Map.Entry)it1.next();
        System.out.println(pair1.getKey() + " = " + pair1.getValue());
    }

    return refined;
}`