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<A NAME="Dictionary()"><!-- --></A><H3>
Dictionary</H3>
<PRE>
public <B>Dictionary</B>()</PRE>
<DL>
<DD>Sole constructor.  (For invocation by subclass constructors, typically
 implicit.)</DL>

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<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public abstract int <B>size</B>()</PRE>
<DL>
<DD>Returns the number of entries (dinstint keys) in this dictionary.<DD><DL>
<DT><B>Returns:</B><DD>the number of keys in this dictionary.</DL>
</DD>
</DL>
<HR>

<A NAME="isEmpty()"><!-- --></A><H3>
isEmpty</H3>
<PRE>
public abstract boolean <B>isEmpty</B>()</PRE>
<DL>
<DD>Tests if this dictionary maps no keys to value. The general contract 
 for the <tt>isEmpty</tt> method is that the result is true if and only 
 if this dictionary contains no entries.<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if this dictionary maps no keys to values;
          <code>false</code> otherwise.</DL>
</DD>
</DL>
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<A NAME="keys()"><!-- --></A><H3>
keys</H3>
<PRE>
public abstract <A HREF="../../java/util/Enumeration.html">Enumeration</A> <B>keys</B>()</PRE>
<DL>
<DD>Returns an enumeration of the keys in this dictionary. The general 
 contract for the keys method is that an <tt>Enumeration</tt> object 
 is returned that will generate all the keys for which this dictionary 
 contains entries.<DD><DL>
<DT><B>Returns:</B><DD>an enumeration of the keys in this dictionary.<DT><B>See Also: </B><DD><A HREF="../../java/util/Dictionary.html#elements()"><CODE>elements()</CODE></A>, 
<A HREF="../../java/util/Enumeration.html"><CODE>Enumeration</CODE></A></DL>
</DD>
</DL>
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<A NAME="elements()"><!-- --></A><H3>
elements</H3>
<PRE>
public abstract <A HREF="../../java/util/Enumeration.html">Enumeration</A> <B>elements</B>()</PRE>
<DL>
<DD>Returns an enumeration of the values in this dictionary. The general 
 contract for the <tt>elements</tt> method is that an 
 <tt>Enumeration</tt> is returned that will generate all the elements 
 contained in entries in this dictionary.<DD><DL>
<DT><B>Returns:</B><DD>an enumeration of the values in this dictionary.<DT><B>See Also: </B><DD><A HREF="../../java/util/Dictionary.html#keys()"><CODE>keys()</CODE></A>, 
<A HREF="../../java/util/Enumeration.html"><CODE>Enumeration</CODE></A></DL>
</DD>
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<A NAME="get(java.lang.Object)"><!-- --></A><H3>
get</H3>
<PRE>
public abstract <A HREF="../../java/lang/Object.html">Object</A> <B>get</B>(<A HREF="../../java/lang/Object.html">Object</A>&nbsp;key)</PRE>
<DL>
<DD>Returns the value to which the key is mapped in this dictionary. 
 The general contract for the <tt>isEmpty</tt> method is that if this 
 dictionary contains an entry for the specified key, the associated 
 value is returned; otherwise, <tt>null</tt> is returned.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - a key in this dictionary.
          <code>null</code> if the key is not mapped to any value in
          this dictionary.<DT><B>Returns:</B><DD>the value to which the key is mapped in this dictionary;<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the <tt>key</tt> is <tt>null</tt>.<DT><B>See Also: </B><DD><A HREF="../../java/util/Dictionary.html#put(java.lang.Object, java.lang.Object)"><CODE>put(java.lang.Object, java.lang.Object)</CODE></A></DL>
</DD>
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<A NAME="put(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
put</H3>
<PRE>
public abstract <A HREF="../../java/lang/Object.html">Object</A> <B>put</B>(<A HREF="../../java/lang/Object.html">Object</A>&nbsp;key,
                           <A HREF="../../java/lang/Object.html">Object</A>&nbsp;value)</PRE>
<DL>
<DD>Maps the specified <code>key</code> to the specified 
 <code>value</code> in this dictionary. Neither the key nor the 
 value can be <code>null</code>.
 <p>
 If this dictionary already contains an entry for the specified 
 <tt>key</tt>, the value already in this dictionary for that 
 <tt>key</tt> is returned, after modifying the entry to contain the
  new element. <p>If this dictionary does not already have an entry 
  for the specified <tt>key</tt>, an entry is created for the 
  specified <tt>key</tt> and <tt>value</tt>, and <tt>null</tt> is 
  returned.
 <p>
 The <code>value</code> can be retrieved by calling the 
 <code>get</code> method with a <code>key</code> that is equal to 
 the original <code>key</code>.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the hashtable key.<DD><CODE>value</CODE> - the value.<DT><B>Returns:</B><DD>the previous value to which the <code>key</code> was mapped
             in this dictionary, or <code>null</code> if the key did not
             have a previous mapping.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the <code>key</code> or
               <code>value</code> is <code>null</code>.<DT><B>See Also: </B><DD><A HREF="../../java/lang/Object.html#equals(java.lang.Object)"><CODE>Object.equals(java.lang.Object)</CODE></A>, 
<A HREF="../../java/util/Dictionary.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
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<A NAME="remove(java.lang.Object)"><!-- --></A><H3>
remove</H3>
<PRE>
public abstract <A HREF="../../java/lang/Object.html">Object</A> <B>remove</B>(<A HREF="../../java/lang/Object.html">Object</A>&nbsp;key)</PRE>
<DL>
<DD>Removes the <code>key</code> (and its corresponding 
 <code>value</code>) from this dictionary. This method does nothing 
 if the <code>key</code> is not in this dictionary.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key that needs to be removed.<DT><B>Returns:</B><DD>the value to which the <code>key</code> had been mapped in this
          dictionary, or <code>null</code> if the key did not have a
          mapping.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if <tt>key</tt> is <tt>null</tt>.</DL>
</DD>
</DL>
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