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//First create the name and language object
JSONObject nameLanguageObj = new JSONObject();
nameLanguageObj.add("name","first");
nameLanguageObj.add("language","English");
//Create the array to hold the objects
JSONArray arr = new JSONArray();
arr.put(nameLanguage);
//Create the full class object as you requested.
JSONObject classObj = new JSONObject();
classObj.put("class", arr);