Removing a json object from a json file in Java

Question

I have this json file I downloaded online:

 {
\"price\": 1,
\"empty\": [
  0,
  0,
  0,
  0,
  0
],
\"lowValue\": 0,
\"highValue\": 0
},

and I

Answer 1

If you put a '[' at the beginning and a ']' at the end of json file, it becomes a valid json file. Like in your json file, It should be.

[
    {
    "price": 1,
    "empty": [
      0,
      0,
      0,
      0,
      0
    ],
    "lowValue": 0,
    "highValue": 0
    },
    {
    "price": 500,
    "empty": [
      5,
      0,
      3,
      6,
      9
    ],
    "lowValue": 4,
    "highValue": 2
    }
]

So the final program will be like:--

public class ReadJSONFromFile {
    public static void main(String[] args) {
        JSONParser parser = new JSONParser();
        try {
            Object obj = parser.parse(new FileReader("locationOfFIle"));
            JSONArray array = (JSONArray) obj;
            FileWriter file = new FileWriter("locationOfFIle");
            for (int index = 0; index < array.size(); ++index) {
                JSONObject jsonObject = (JSONObject) array.get(index);
                jsonObject.remove("empty");
                file.write(jsonObject.toJSONString());
                file.flush();
                if (index == array.size() - 1)
                    file.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}