how can I create an arraylist of all possible combinations from a json file

Question

I'm currently creating a Cluedo game and I'm editing the playerpiece class, I have also created a json file called data.json to store data about the playerpiece, for instance: Character (e.g Colonel Mustard), Weapon etc.

{
  "PlayerPieces": {
    "0": "Col Mustard",
    "1": "Prof Plum",
    "2": "Rev Green",
    "3": "Mrs Peacock",
    "4": "Miss Scarlett",
    "5": "Mrs White"
  },
  "Weapons": {
    "0": "Dagger",
    "1": "Candlestick" ,
    "2": "Revolver",
    "3": "Rope",
    "4": "Lead Piping",
    "5": "Spanner"
  }
}

At the moment, I'm trying to figure out how I can create an arraylist of all possible instances of the PlayerPieces, any help on how to get started would be greatly, greatly appreciated!

So you basically want every PlayerPieces to have an instance with each of the weapons ? — Amine Dakhli, Feb 28 '21 at 12:48
does the JSON fill will always contain PlayerPieces and Weapons and the number of elements will be change? — Mahmoud Odeh, Feb 28 '21 at 13:13

score 0 · Accepted Answer · answered Feb 28 '21 at 13:16

Something like this will help I hope.

String stringToParse = "{\r\n"
                + "  \"PlayerPieces\": {\r\n"
                + "    \"0\": \"Col Mustard\",\r\n"
                + "    \"1\": \"Prof Plum\",\r\n"
                + "    \"2\": \"Rev Green\",\r\n"
                + "    \"3\": \"Mrs Peacock\",\r\n"
                + "    \"4\": \"Miss Scarlett\",\r\n"
                + "    \"5\": \"Mrs White\"\r\n"
                + "  },\r\n"
                + "  \"Weapons\": {\r\n"
                + "    \"0\": \"Dagger\",\r\n"
                + "    \"1\": \"Candlestick\" ,\r\n"
                + "    \"2\": \"Revolver\",\r\n"
                + "    \"3\": \"Rope\",\r\n"
                + "    \"4\": \"Lead Piping\",\r\n"
                + "    \"5\": \"Spanner\"\r\n"
                + "  }\r\n"
                + "}";

        try {
            Map<String, String> attributes = new HashMap<>();
            JSONObject obj = new JSONObject(stringToParse);
            if (obj.has("PlayerPieces")) {
                JSONObject objPlayerPieces = obj.getJSONObject("PlayerPieces");
                Iterator<String> keysCat = objPlayerPieces.keys();
                while (keysCat.hasNext()) {
                    String key = keysCat.next();
                    attributes.put(key, objPlayerPieces.getString(key));
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

Therefore, you will get all the attributes of "PlayerPieces" inside the attributes hashmap for as long as you have them defined in the json file.

how can I create an arraylist of all possible combinations from a json file

1 Answers1