DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="depth()"><!-- --></A><H3>
depth</H3>
<PRE>
public int <B>depth</B>()</PRE>
<DL>
<DD>Returns the number of levels in the tree.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="isEmpty()"><!-- --></A><H3>
isEmpty</H3>
<PRE>
public boolean <B>isEmpty</B>()</PRE>
<DL>
<DD>Tests whether the index contains any items.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the index does not contain any ite