Need to read a json file that is in "UCS-2 LE BOM" or "UTF-8 BOM" encoding format. The below code read json from UTF-8
JSONParser parser = new JSONParser();
InputStream inputStream = new FileInputStream(inputJsonPath);
Reader fileReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
Object obj = parser.parse(fileReader);
org.json.simple.JSONObject inputJsonObject = (org.json.simple.JSONObject) obj;