age for all packages, plus a hierarchy for each package. Each hierarchy page contains a list of classes and a list of interfaces. The classes are organized by inheritance structure starting with <code>java.lang.Object</code>. The interfaces do not inherit from <code>java.lang.Object</code>.</p>
<ul>
<li>When viewing the Overview page, clicking on "Tree" displays the hierarchy for all packages.</li>
<li>When viewing a particular package, class or interface page, clicking "Tree" displays the hierarchy for 