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<A NAME="AbstractIterator()"><!-- --></A><H3>
AbstractIterator</H3>
<PRE>
public <B>AbstractIterator</B>()</PRE>
<DL>
<DD>Default constructor (for base class invocation).
 Does nothing.  Remind Sun (<a href="mailto:[e-mail]">[e-mail]</a>) that automatically implemented default
 constructors are a silly thing.</DL>

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<A NAME="reset()"><!-- --></A><H3>
reset</H3>
<PRE>
public abstract void <B>reset</B>()</PRE>
<DL>
<DD>Reset iterator to the beginning of the structure.
 This method is not required of <code>Iterator</code> or 
 <code>Enumeration</code> implementation, but some traversals
 may allow efficient multi-pass implementations with little
 overhead.  The user is encouraged to implement this method.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>iterator may be initialized or even amid-traversal<DT><B>Postcondition:</B><DD>reset iterator to the beginning of the structure</DL>
</DD>
</DL>
<HR>

<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
public abstract boolean <B>hasNext</B>()</PRE>
<DL>
<DD>Returns true if the iterator has more elements to visit.
 The method <code>hasMoreElements</code> is an
 <code>Enumeration</code>-required call to this method.  The user
 should override only this method.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html#hasNext()">hasNext</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html">Iterator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Postcondition:</B><DD>true iff the iterator has more elements to visit<DT><B>Returns:</B><DD>true iff the iterator has more elements to visit<DT><B>See Also: </B><DD><A HREF="../structure/AbstractIterator.html#hasMoreElements()"><CODE>hasMoreElements()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="get()"><!-- --></A><H3>
get</H3>
<PRE>
public abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>get</B>()</PRE>
<DL>
<DD>Returns the value currently being considered by the AbstractIterator.
 This method is required by neither <code>Iterator</code> nor
 <code>Enumeration</code>.  This method should be implemented,
 however, to provide better support for <code>for</code>-loops.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>there are more elements to be considered; hasNext()<DT><B>Postcondition:</B><DD>returns current value; ie. value next() will return<DT><B>Returns:</B><DD>the next value to be considered in iterator</DL>
</DD>
</DL>
<HR>

<A NAME="value()"><!-- --></A><H3>
value</H3>
<PRE>
public final <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>value</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>This method was deprecated in version 2 of the structure
 package. Use the get method.</I>
<P>
<DD>Returns the value currently being considered by the AbstractIterator.
 This method is required by neither <code>Iterator</code> nor
 <code>Enumeration</code>.  This method should be implemented,
 however, to provide better support for <code>for</code>-loops.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>there are more elements to be considered; hasNext()<DT><B>Postcondition:</B><DD>returns the current value; the value next() will return<DT><B>Returns:</B><DD>the next value to be considered in iterator</DL>
</DD>
</DL>
<HR>

<A NAME="next()"><!-- --></A><H3>
next</H3>
<PRE>
public abstract <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>next</B>()</PRE>
<DL>
<DD>Moves, bumps, or "increments" the iterator along the traversal;
 returns the next value considered.
 This method should only be called if the iterator has a next value.
 To get a value from an iterator multiple times, use the
 <code>value</code> method.
 <p>
 This method is preferred over the <code>nextElement</code> method.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html#next()">next</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html">Iterator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>hasNext()<DT><B>Postcondition:</B><DD>returns current value, and then increments iterator<DT><B>Returns:</B><DD>the current value<DT><B>See Also: </B><DD><A HREF="../structure/AbstractIterator.html#hasMoreElements()"><CODE>hasMoreElements()</CODE></A>, 
<A HREF="../structure/AbstractIterator.html#value()"><CODE>value()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="remove()"><!-- --></A><H3>
remove</H3>
<PRE>
public void <B>remove</B>()</PRE>
<DL>
<DD>If implemented, removes the currently visited value from the structure.
 <code>remove</code> should not be called unless it is overridden.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html#remove()">remove</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Iterator.html">Iterator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>hasNext() is true and get() has not been called<DT><B>Postcondition:</B><DD>the value has been removed from the structure</DL>
</DD>
</DL>
<HR>

<A NAME="hasMoreElements()"><!-- --></A><H3>
hasMoreElements</H3>
<PRE>
public final boolean <B>hasMoreElements</B>()</PRE>
<DL>
<DD>An Enumeration method that is equivalent to <A HREF="../structure/AbstractIterator.html#hasNext()"><CODE>hasNext()</CODE></A>.
 Extensions to this class should provide a <code>hasNext</code>
 method.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Enumeration.html#hasMoreElements()">hasMoreElements</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Enumeration.html">Enumeration</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Postcondition:</B><DD>returns true iff there are more elements<DT><B>Returns:</B><DD>returns true iff there are more elements</DL>
</DD>
</DL>
<HR>

<A NAME="nextElement()"><!-- --></A><H3>
nextElement</H3>
<PRE>
public final <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A> <B>nextElement</B>()</PRE>
<DL>
<DD>An Enumeration method that is equivalent to <A HREF="../structure/AbstractIterator.html#next()"><CODE>next()</CODE></A>.
 Extensions to this class should provide a <code>next</code> method.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Enumeration.html#nextElement()">nextElement</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Enumeration.html">Enumeration</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Precondition:</B><DD>hasNext()<DT><B>Postcondition:</B><DD>returns the current value and "increments" the iterator<DT><B>Returns:</B><DD>the current value before iterator is incremented</DL>
</DD>
</DL>
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