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What can be the reason to the error in the title?

I import classes from here:

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

And then add watch to the following expression:

(((JSONObject)obj).getJSONArray("userTests")

And then get:

java no such instance method 'org.json.simple.JSONObejct.getJSONArray'

Also when run the code, not by watch expession, I get:

cannot resolve method 'getJSONArray(java.lang.string)'

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    I think you are mixing libraries (calling methods of one, but using the other): stackoverflow.com/questions/17941743/… Commented Oct 28, 2018 at 13:22
  • You should copy the exact error messages, not write something from your memory. Further, this problem description is inconsistent. If the compiler can’t resolve a message, it will tell you already at compile-time, without the need to run the code. Commented Oct 29, 2018 at 13:05
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