How do I format the results of a JSONArray

Question

So I am trying to use the API here: https://clinicaltables.nlm.nih.gov/apidoc/icd10cm/v3/doc.html#output

This is my code so far:

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Scanner;

import org.json.simple.*;
import org.json.simple.parser.JSONParser;

public class DiagnosesAPIHelper 
{
    
    public static void main(String[] args)
    {
        
        try
        {
            URL url = new URL ("https://clinicaltables.nlm.nih.gov/api/icd10cm/v3/search?sf=code,name&terms=tuberc");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.connect();

            int responseCode = conn.getResponseCode();
            
            if(responseCode != 200)
            {
                throw new Exception("HTTP Response code: " + responseCode);
            }
            else
            {

                String inline = "";
                Scanner scanner = new Scanner(url.openStream());

                //Write all the JSON data into a string using a scanner
                while (scanner.hasNext()) {
                    inline += scanner.nextLine();
                }

                //Close the scanner
                scanner.close();
                
                //Using the JSON simple library parse the string into a json object
                JSONParser parse = new JSONParser();
                JSONArray jsonArray = (JSONArray) parse.parse(inline);

                System.out.println(jsonArray.get(3).toString());
                
                
            }} catch (Exception e) {
            e.printStackTrace();
        }
    
    }

}

And here are the outputs that I am getting:

[["A15.0","Tuberculosis of lung"],["A15.4","Tuberculosis of intrathoracic lymph nodes"],["A15.5","Tuberculosis of larynx, trachea and bronchus"],["A15.6","Tuberculous pleurisy"],["A15.7","Primary respiratory tuberculosis"],["A15.8","Other respiratory tuberculosis"],["A15.9","Respiratory tuberculosis unspecified"]]

How would I extract the ICD code, and the diagnoses description?

So with what I get [["A15.0","Tuberculosis of lung"]

How would I make 2 strings out of it one for the A15.0 part, and another for the Tuberculosis of lung part.

I can tokenize it, but that would be quite a bit of work. There has to be an easier way.

Thanks in advance

Answer 1

In order to iterate on the elements of a JSON array, you have to cast the returned general object to JSONArray.

In your example jsonArray.get(3) returns a general object because in a JSON you can have different types of objects such as number, string and array.

However, you know that jsonArray.get(3) returns an array so if you cast you can handle the result like an array or a list.

This is an example that you can put after System.out.println(jsonArray.get(3).toString());

JSONArray elements = (JSONArray) jsonArray.get(3);
for (Object element : elements) {
    JSONArray elementJSONArray = (JSONArray) element;
    System.out.println("code: " + elementJSONArray.get(0));
    System.out.println("description: " + elementJSONArray.get(1));
}

Output

code: A15.0
description: Tuberculosis of lung
code: A15.4
description: Tuberculosis of intrathoracic lymph nodes
code: A15.5
description: Tuberculosis of larynx, trachea and bronchus
code: A15.6
description: Tuberculous pleurisy
code: A15.7
description: Primary respiratory tuberculosis
code: A15.8
description: Other respiratory tuberculosis
code: A15.9
description: Respiratory tuberculosis unspecified