Please help config/integerList giving true instead of list

Please help config/integerList giving true instead of list: Code:

Code:

ItemStack x = p.getItemInHand();
                                    ArrayList<Integer> id = (ArrayList<Integer>) this.getConfig().getIntegerList("shop."+args[0].toLowerCase()+".idList");
                                    id.add(x.getTypeId());
                                    ArrayList<Integer> amount = (ArrayList<Integer>) this.getConfig().getIntegerList("shop."+args[0].toLowerCase()+".amountList");
                                    amount.add(x.getAmount());
                                    ArrayList<Integer> price = (ArrayList<Integer>) this.getConfig().getIntegerList("shop."+args[0].toLowerCase()+".priceList");
                                    price.add(x.getAmount());
                                    this.getConfig().set("shop."+args[0].toLowerCase()+".idList", id);
                                    this.getConfig().set("shop."+args[0].toLowerCase()+".amountList", amount);
                                    this.getConfig().set("shop."+args[0].toLowerCase()+".priceList", price);
                                    this.saveConfig();
                                    return true;

config.yml after run:

Code:

shop:
  spawner:
    idList: true
    amountList: true
    priceList: true

Why is it giving true instead of {...}

 

Is this a method, then it is returning true because you are telling it to:

 

its in the on Commands i dont see why it would return true in the config

How is this giving me a nullpointerexception?

Code:

ItemStack temp = new ItemStack(Material.getMaterial(temps.get(i)),temps2.get(i));
            ItemMeta m = temp.getItemMeta();
            ArrayList<String> s = new ArrayList<>();
            s.add("$"+price.get(i));
            m.setLore(s);
            temp.setItemMeta(m);
            x.addItem(temp);

EDIT by Moderator: merged posts, please use the edit button instead of double posting.