public boolean addGoodsInCart(Items item, int number){
Set<Items> it = goods.keySet();
int k = 0;
for(Items i : it)
{
if(i.getId() == item.getId())
{
k = goods.get(i);
}
}
goods.put(item, k + number);
calTotalPrice();
return true;
}
沒聽課之前自己寫的，還是覺得老師講的更好。
