create JSONObject json object using string in java

/**
 * @author lautturi.com 
 * Java example:
 */

import java.util.*;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

public class Lautturi {
	public static void main(String[] args) {
		String message;
		JSONObject json = new JSONObject();
		json.put("name", "lautturi");

		JSONArray array = new JSONArray();
		JSONObject item = new JSONObject();
		item.put("id", 123);
		item.put("name", "java");
		item.put("desc", "learning java");
		array.add(item);

		json.put("course", array);

		message = json.toString();
		
		System.out.println(message);
	}
}

output:

{"name":"lautturi","course":[{"name":"java","id":123,"desc":"learning java"}]}