Creating nested JSON object for the following structure in Java using JSONObject? [closed]

With the imports org.json.JSONArray and org.json.JSONObject

JSONObject object = new JSONObject();object.put("name", "sample");JSONArray array = new JSONArray();JSONObject arrayElementOne = new JSONObject();arrayElementOne.put("setId", 1);JSONArray arrayElementOneArray = new JSONArray();JSONObject arrayElementOneArrayElementOne = new JSONObject();arrayElementOneArrayElementOne.put("name", "ABC");arrayElementOneArrayElementOne.put("type", "STRING");JSONObject arrayElementOneArrayElementTwo = new JSONObject();arrayElementOneArrayElementTwo.put("name", "XYZ");arrayElementOneArrayElementTwo.put("type", "STRING");arrayElementOneArray.put(arrayElementOneArrayElementOne);arrayElementOneArray.put(arrayElementOneArrayElementTwo);arrayElementOne.put("setDef", arrayElementOneArray);array.put(arrayElementOne);object.put("def", array);

I did not include first array's second element for clarity. Hope you got the point though.

EDIT:

The previous answer was assuming you were using org.json.JSONObject and org.json.JSONArray.

For net.sf.json.JSONObject and net.sf.json.JSONArray :

JSONObject object = new JSONObject();object.element("name", "sample");JSONArray array = new JSONArray();JSONObject arrayElementOne = new JSONObject();arrayElementOne.element("setId", 1);JSONArray arrayElementOneArray = new JSONArray();JSONObject arrayElementOneArrayElementOne = new JSONObject();arrayElementOneArrayElementOne.element("name", "ABC");arrayElementOneArrayElementOne.element("type", "STRING");JSONObject arrayElementOneArrayElementTwo = new JSONObject();arrayElementOneArrayElementTwo.element("name", "XYZ");arrayElementOneArrayElementTwo.element("type", "STRING");arrayElementOneArray.add(arrayElementOneArrayElementOne);arrayElementOneArray.add(arrayElementOneArrayElementTwo);arrayElementOne.element("setDef", arrayElementOneArray);object.element("def", array);

Basically it's the same, replacing the method 'put' for 'element' in JSONObject, and 'put' for 'add' in JSONArray.

Here is one crude example. You should be able to refine. (You may be interested in this Java "tutorial" http://docs.oracle.com/javaee/7/tutorial/doc/jsonp.htm#GLRBB

(This example uses the JSON reference implementation included in Java EE (and available here: https://java.net/projects/jsonp/downloads/directory/ri)

package com.demo;import java.io.FileWriter;import java.io.IOException;import javax.json.Json;import javax.json.stream.JsonGenerator;public class JSONExample {public static void main(String[] args) {    FileWriter writer = null;    try {        writer = new FileWriter("C:\\Users\\Joseph White\\Downloads\\jsontext.txt");    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    JsonGenerator gen = Json.createGenerator(writer);    gen.writeStartObject().write("name", "sample")        .writeStartArray("def")          .writeStartObject().write("setId", 1)             .writeStartArray("setDef")                .writeStartObject().write("name", "ABC").write("type", "STRING")                .writeEnd()                .writeStartObject().write("name", "XYZ").write("type", "STRING")                .writeEnd()            .writeEnd()          .writeEnd()            .writeStartObject().write("setId", 2)              .writeStartArray("setDef")                .writeStartObject().write("name", "abc").write("type", "STRING")                .writeEnd()                .writeStartObject().write("name", "xyz").write("type", "STRING")                .writeEnd()              .writeEnd()            .writeEnd()          .writeEnd()        .writeEnd();    gen.close();} }