Help to compare Json objects in Java and get a Json of differences!

I have the following function that a Json generates with all the contents of a directory:

  public static void generateReport(File dir, JSONArray content) throws IOException, ParseException {
        File listFile[] = dir.listFiles();
        String md5;
        if (listFile != null && listFile.length > 0) {
            for (int i = 0; i < listFile.length; i++) {
                JSONObject obj = new JSONObject();
                content.add(obj);
                if (listFile[i].isDirectory()) {
                    md5 = md5OfString(listFile[i].getAbsolutePath());
                    obj.put("md5", md5);
                    obj.put("type", "folder");
                    obj.put("path", listFile[i].getAbsolutePath());
                    JSONArray contentSon = new JSONArray();
                    obj.put("Content", contentSon);
                    generateReport(listFile[i], contentSon);
                    //numDir++;
                } else if (listFile[i].isFile()) {
                    md5 = md5OfFile(listFile[i]);
                    obj.put("md5", md5);
                    obj.put("type", "file");
                    obj.put("path", listFile[i].getAbsolutePath());
                    //numFiles++;
                }
            }
        }
    }

Calling this function twice, with different parameters, would generate two JSONs with different data. What I need is to compare both generated JSONs and generate a new JSON with the differences between the other two.

Ex of report of differences:

{
    "root": "/u/data/Coldview/apps",
    "origin-report": "informe.json",
    "diff": [
        {
            "type": "folder",
            "path": "ldf.web.ejecuciondeprotestos",
            "origin-md5": ".........",
            "destination-md5": "........."
        },
        {
            "type": "folder",
            "path": "ldf.web.ejecuciondeprotestos/lib",
            "origin-md5": ".........",
            "destination-md5": "........."
        },
        {
            "type": "file", 
            "name": "AMCOX.Core.jar", 
            "origin-md5": ".........",
            "destination-md5": "........."
        }
    ]
}

What I do not know is how to compare my two JSON objects and get the differences between them.

I'm using the Json-Simple library

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

but it does not seem to have any method for what I need because of what I'm seeing if I have to change the library or that!

Thanks for the help, advice, etc.

Greetings!