Simply download the org.json jar file, then paste it to your project folder and add it to your project build path. For example in above sample JSON file, the key car exists but the value is null (JSONObject.NULL); the key house doesn't exist at all.
30 Jan 2015 JSON File. URL: https://data.hawaii.gov/api/views/usep-nua7/rows.json?accessType=DOWNLOAD purposes only. Source: Sample DataSet