llowing:
 an object (<a href="JsonObject.html" title="interface in jakarta.json"><code>JsonObject</code></a>), an array (<a href="JsonArray.html" title="interface in jakarta.json"><code>JsonArray</code></a>),
 a number (<a href="JsonNumber.html" title="interface in jakarta.json"><code>JsonNumber</code></a>), a string (<a href="JsonString.html" title="interface in jakarta.json"><code>JsonString</code></a>),
 <code>true</code> (<a href="#TRUE"><code>JsonValue.TRUE</code></a>), <code>false</code>
 (<a href="#F