RealNight

if we do in json file - charge: 30000.0d instead of "charge": "30000.0d" it means that we are trying to ask json library to generate invalid json. In gson part corrects this mistake and add quotes. About a replaceall func: that is not the final version, i know that string can contain tree of nbt, so i need to check and figure all of them. Now, for 1 lvl tree of nbt it is more than enough.

I read that it is rule of form of json & gson

Sorry, however i am really stupid... return (json != null) ? JsonToNBT.func_150315_a(json.toString().replaceAll("\"", "")) : null; and it works, wasted so many time and yours...

maybe you meant NBTDeserializer that implements json deserializer<ObjectName> (in our case NBTBase). In this class it turn to string everything that is found under nbt:{ }

No, new NBTDeserializer() is the name of the class file where it adapts minecraft NBTBase file (it is option for gson building like a string) example: nbt:{"charge":"30000.0d"} (that is without adapting) , with adapting - nbt: {"charge":"30000.0d",} (comma is added in the end) After that i apply settings that i made for gson for taking data from file.json and place data in the ItemConfig class

I have items.json file where are storing data about different itemstack (name, metadata, amount, enchants and nbt) All works nice, but nbt format is not correct: example: items.json "name": "groupofitems", "items": [{ "item": "IC2:itemToolChainsaw", "metadata": 27, "amount": 1, "enchantments": {}, "nbt": { "charge": 30000.0d } }] //next groups and items.... and result is - {"charge":"30000.0d",} - this is wrong and not working, it have to be {charge:30000.0d} How to solve this problem?