Why can't I instantiate a JSONObject in Java (string cannot be converted to map)

Question

I am reading a Stackoverflow post (here), I am writing the code contained in the answer but I can't instantiate a JSONObject. The post don't specify where JSONObject comes from so imported it as follows:

  import org.json.simple.JSONObject;  

  String jsonData = response.body().string();
  JSONObject json = new JSONObject(jsonData); //jsonData marked as the soruce of the error and the message "incompatible types cannot convert string to map" shows.

what do you think 'String cannot be converted to Map' means? — Stultuske, Jan 15 '18 at 13:33
What bugs me is not the error message, which is clear, but the fact that it seems it is not working only for me. — Diego Alves, Jan 15 '18 at 13:36
I am not getting a runtime error, I am getting a compilation error, so I don't think the string matters. — Diego Alves, Jan 15 '18 at 13:41
@DiegoAlves 'String cannot be converted to Map', so yes, the String matters. not the content, but the type. you are somewhere trying to do Map,?> test = "hello"; (or similar), which, obviously, can not work — Stultuske, Jan 15 '18 at 13:45
Check your stacktrace, check that the version of your library has a constructor of JSONObject that accepts a String, ... — Stultuske, Jan 15 '18 at 13:48
Make sure you're using the right JSONObject. The one in package org.json.simple is not the one you want to use here. — Klitos Kyriacou, Jan 15 '18 at 13:56

RobCo · Accepted Answer · 2018-01-15T14:30:07.330

2

You probably want org.json.JSONObject. That one has a constructor that takes a String.

edited Jan 15 '18 at 14:30

answered Jan 15 '18 at 14:05

RobCo

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I am new to java I see that is very common to find classes with the same name that come from different packages. – Diego Alves Jan 15 '18 at 14:47

Why can't I instantiate a JSONObject in Java (string cannot be converted to map)

1 Answers1