title: How to check the type of a value from a JSONObject?
body: <p>I'm trying to get the type of the value stored in a <code>JSONObject</code>. </p>
  
  <pre><code>String jString = {"a": 1, "b": "str"};
  JSONObject jObj = new JSONObject(jString);
  </code></pre>
  
  <p>Is it possible to get the type of the value stored at key <code>"a"</code>; 
   something like <code>jObj.typeOf("a") = java.lang.Integer</code>?</p>