java - Android Studio:error: illegal character: 'u2028'

Question

I am trying to do a JSONObject request:

final String URL = "https://some/url";

// Post params to be sent to the server
HashMap<String, String> params = new HashMap<String, String>();
params.put("param1", param1);
?params.put("param2", param2);
?params.put("param3", param3);?    
params.put("param4", param4);


JsonObjectRequest req = new JsonObjectRequest(URL, new JSONObject(params), new Response.Listener<JSONObject>() {
    @Override
    public void onResponse(JSONObject response) {
        try {
            VolleyLog.v("Response:%n %s", "l?uft");
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        VolleyLog.e("Error: ", error.getMessage());
    }
});

// add the request object to the queue to be executed
NetworkController.getInstance().addToRequestQueue(req);

I cannot compile the project because I get a syntax error for the params:

Error:(144, 9) error: illegal character: 'u2028'

How can I fix that?

Answer 1

It's the new line character, if you go to each of the lines that are causing the error and delete the 'invisible' last character then the errors will resolve

Go to end of the line that is causing the error and hit backspace once, for each of the lines that have the illegal character error.