comparing values from json not working on java android studio

So I make a request to my online api, I get the correct response, but when its time to compare the values from the response, I get a logical error as the default ‘else’ statement is been executed and the toast i get is "Unknown Error!" instead of the ‘if’ statement for code:200. PLease help out.

public void onResponse(String response) {
                    try {
                        JSONObject jsonObject = new JSONObject(response);
                        String code = jsonObject.getString("code");
                        if (code=="200"){
                            String UserID=jsonObject.getString("id");
                            int duration = Toast.LENGTH_SHORT;

                            Toast toast = Toast.makeText(context, UserID, duration);
                            toast.show();
                        }
                        else if (code=="201"){
                            int duration = Toast.LENGTH_SHORT;

                            Toast toast = Toast.makeText(context, "Account Not Found!", duration);
                            toast.show();
                        }
                        else{
                            int duration = Toast.LENGTH_SHORT;

                            Toast toast = Toast.makeText(context, "Unknown Error!", duration);
                            toast.show();
                        }

                    } catch (JSONException e) {
                        e.printStackTrace();
                        int duration = Toast.LENGTH_LONG;

                        Toast toast = Toast.makeText(context, e.toString(), duration);
                        toast.show();
                    }

                }

>Solution :

The problem is highly likely due to the comparison of strings with =. Always use String.equals() when comparing strings:

if (code.equals("200")) {
  String UserID = jsonObject.getString("id");
  int duration = Toast.LENGTH_SHORT;

  Toast toast = Toast.makeText(context, UserID, duration);
  toast.show();
} else if (code.equals("201")) {
  int duration = Toast.LENGTH_SHORT;

  Toast toast = Toast.makeText(context, "Account Not Found!", duration);
  toast.show();
} else {
  int duration = Toast.LENGTH_SHORT;

  Toast toast = Toast.makeText(context, "Unknown Error!", duration);
  toast.show();
}

Also see this answer.