JSONException String cannot be converted to JSONObject

Question

I am trying to convert string to JSONObject. This is my code:

JSONObject obj = new JSONObject(str);

Vehicle.feature file contains :

    Scenario: Create a vehicle with valid json request
    Given vehicle json for VehicleService
    """
        "{\"vin\" : \"VIN5\", \"brand\" : \"Toyota\", \"model\" : \"Innova\", \"year\" : \"2017\", \"color\" : \"Red\", \"modelCode\" : \"1234\", \"type\" : \"M\", \"countryCode\" : \"JP\", \"isConnected\" : \"true\", \"isActive\" : \"true\"}"
    """
    When performing POST on VehicleService url /add
    Then VehicleService should return status code 200

VehicleStepDefs contains:

@Given("^vehicle json for VehicleService$")
public void submitValidVehicleRequest(String vehicleJson) throws JSONException {
    JSONObject obj = new JSONObject(vehicleJson);
    request = given().and()
            .header("Content-Type", MediaType.APPLICATION_JSON)
            .accept(ContentType.JSON)
            .body(obj);
    request.then().log().all();
}

My error looks like this :

org.json.JSONException: Value {"vin" : "VIN5", "brand" : "Toyota", "model" : "Innova", "year" : "2017", "color" : "Red", "modelCode" : "1234", "type" : "M", "countryCode" : "JP", "isConnected" : "true", "isActive" : "true"} of type java.lang.String cannot be converted to JSONObject
        at org.json.JSON.typeMismatch(JSON.java:111)
        at org.json.JSONObject.<init>(JSONObject.java:159)
        at org.json.JSONObject.<init>(JSONObject.java:172)
        at com.examples.demo.VehicleStepDefs.submitValidVehicleRequest(VehicleStepDefs.java:43)
        at ?.Given vehicle json for VehicleService(Vehicle.feature:8)

What am I doing wrong?

score 1 · Answer 1 · answered Dec 20 '19 at 06:53

Check your imports.

Here is the running code:

import org.json.JSONException;
import org.json.JSONObject;

public class TestJson {
    public static void main(String[] args) {
        try {
            JSONObject obj = new JSONObject("{\"vin\" : \"VIN5\", \"brand\" : \"Toyota\", \"model\" : \"Innova\", \"year\" : \"2017\", \"color\" : \"Red\", \"modelCode\" : \"1234\", \"type\" : \"M\", \"countryCode\" : \"JP\", \"isConnected\" : \"true\", \"isActive\" : \"true\"}");
            System.out.println(obj.get("model"));
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

}

Output: Innova

score 0 · Answer 2 · answered Dec 20 '19 at 07:26

I am using the latest org.json jar json-20190722.jar

And i am able to print the json string without any issues, you can refer my code:

public static void main(String[] args) {

        String str = "{\"vin\" : \"VIN5\", \"brand\" : \"Toyota\", \"model\" : \"Innova\", \"year\" : \"2017\", \"color\" : \"Red\", \"modelCode\" : \"1234\", \"type\" : \"M\", \"countryCode\" : \"JP\", \"isConnected\" : \"true\", \"isActive\" : \"true\"}";

        JSONObject obj = new JSONObject(str);
        System.out.println(obj.getString("brand"));
        // this also works when we are not sure of the return type of the resultant object
        System.out.println(obj.get("brand"));

    }

When i try changing the

System.out.println(obj.getString("brand"));

to

System.out.println(obj.getJSONArray("brand"));

I got this exception

Exception in thread "main" org.json.JSONException: JSONObject["brand"] is not a JSONArray. at org.json.JSONObject.getJSONArray(JSONObject.java:752) at com.christmas.Main.main(Main.java:14)

which is clearly mentioning that the result is not of JsonArray type.

It is better you post your logic and complete stacktrace .

I am writing cucumber tests. I have to pass json into the request body. I have updated the question with more details — Rubal Jain, Dec 20 '19 at 07:59

LHCHIN · Answer 3 · 2019-12-20T08:39:14.827

0

It seems the response string was encoded with another type (such as UTF-8 with BOM). Try adding following code snippet then convert it again.

vehicleJson = vehicleJson.substring(vehicleJson.indexOf("{"), vehicleJson.lastIndexOf("}") + 1);
JSONObject obj = new JSONObject(vehicleJson);
...

edited Dec 20 '19 at 08:39

answered Dec 20 '19 at 08:18

LHCHIN

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Now I'm getting the exception : org.json.JSONException: Expected literal value at character 1 of {\"vin\" ... – Rubal Jain Dec 20 '19 at 08:32

JSONException String cannot be converted to JSONObject

3 Answers3