title: JsonObject vs JSONObject
body: <p>I am a bit confused about Json Class in java libraries.
  I could find these 3 at least and all seems Oracle Json Libraries</p>
  <ul>
  <li>javax.json <a href="https://docs.oracle.com/javaee/7/api/javax/json/JsonObject.html" rel="nofollow noreferrer">JsonObject</a></li>
  <li>com.oracle.json <a href="https://docs.oracle.com/javame/8.0/api/json/api/com/oracle/json/JsonObject.html" rel="nofollow noreferrer">JsonObject</a></li>
  <li>org.json <a href="https://stleary.github.io/JSON-java/org/json/JSONObject.html" rel="nofollow noreferrer">JSONObject</a></li>
  </ul>
  <p>Why so many Oracle json class?</p>