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

Use a JSON library like Jackson:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

import java.io.IOException;

public class JsonDelete {

    public static void main(String[] args) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        String json = "{\"key\":\"value\",\"empty\":[]}";

        ObjectNode node = (ObjectNode) mapper.readTree(json);
        node.remove("empty");

        System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(node));
    }

}

Outputs:

{
  "key" : "value"
}