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<A NAME="Hashtable(int)"><!-- --></A><H3>
Hashtable</H3>
<PRE>
public <B>Hashtable</B>(int&nbsp;initialCapacity)</PRE>
<DL>
<DD>Constructs a new, empty hashtable with the specified initial
 capacity.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>initialCapacity</CODE> - the initial capacity of the hashtable.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if the initial capacity is less
             than zero<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="Hashtable()"><!-- --></A><H3>
Hashtable</H3>
<PRE>
public <B>Hashtable</B>()</PRE>
<DL>
<DD>Constructs a new, empty hashtable with a default capacity and load
 factor.<DD><DL>
<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>

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<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public int <B>size</B>()</PRE>
<DL>
<DD>Returns the number of keys in this hashtable.<DD><DL>
<DT><B>Returns:</B><DD>the number of keys in this hashtable.<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="isEmpty()"><!-- --></A><H3>
isEmpty</H3>
<PRE>
public boolean <B>isEmpty</B>()</PRE>
<DL>
<DD>Tests if this hashtable maps no keys to values.<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if this hashtable maps no keys to values;
          <code>false</code> otherwise.<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="keys()"><!-- --></A><H3>
keys</H3>
<PRE>
public <A HREF="../../java/util/Enumeration.html">Enumeration</A> <B>keys</B>()</PRE>
<DL>
<DD>Returns an enumeration of the keys in this hashtable.<DD><DL>
<DT><B>Returns:</B><DD>an enumeration of the keys in this hashtable.<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/util/Enumeration.html"><CODE>Enumeration</CODE></A>, 
<A HREF="../../java/util/Hashtable.html#elements()"><CODE>elements()</CODE></A></DL>
</DD>
</DL>
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<A NAME="elements()"><!-- --></A><H3>
elements</H3>
<PRE>
public <A HREF="../../java/util/Enumeration.html">Enumeration</A> <B>elements</B>()</PRE>
<DL>
<DD>Returns an enumeration of the values in this hashtable.
 Use the Enumeration methods on the returned object to fetch the elements
 sequentially.<DD><DL>
<DT><B>Returns:</B><DD>an enumeration of the values in this hashtable.<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/util/Enumeration.html"><CODE>Enumeration</CODE></A>, 
<A HREF="../../java/util/Hashtable.html#keys()"><CODE>keys()</CODE></A></DL>
</DD>
</DL>
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<A NAME="contains(java.lang.Object)"><!-- --></A><H3>
contains</H3>
<PRE>
public boolean <B>contains</B>(<A HREF="../../java/lang/Object.html">Object</A>&nbsp;value)</PRE>
<DL>
<DD>Tests if some key maps into the specified value in this hashtable.
 This operation is more expensive than the <code>containsKey</code>
 method.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - a value to search for.<DT><B>Returns:</B><DD><code>true</code> if some key maps to the
             <code>value</code> argument in this hashtable;
             <code>false</code> otherwise.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the value is <code>null</code>.<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/util/Hashtable.html#containsKey(java.lang.Object)"><CODE>containsKey(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="containsKey(java.lang.Object)"><!-- --></A><H3>
containsKey</H3>
<PRE>
public boolean <B>containsKey</B>(<A HREF="../../java/lang/Object.html">Object</A>&nbsp;key)</PRE>
<DL>
<DD>Tests if the specified object is a key in this hashtable.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - possible key.<DT><B>Returns:</B><DD><code>true</code> if the specified object is a key in this
          hashtable; <code>false</code> otherwise.<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/util/Hashtable.html#contains(java.lang.Object)"><CODE>contains(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="get(java.lang.Object)"><!-- --></A><H3>
get</H3>
<PRE>
public <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 specified key is mapped in this hashtable.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - a key in the hashtable.<DT><B>Returns:</B><DD>the value to which the key is mapped in this hashtable;
          <code>null</code> if the key is not mapped to any value in
          this hashtable.<DT><B>Since: </B><DD>JDK1.0</DD>
<DT><B>See Also: </B><DD><A HREF="../../java/util/Hashtable.html#put(java.lang.Object, java.lang.Object)"><CODE>put(java.lang.Object, java.lang.Object)</CODE></A></DL>
</DD>
</DL>
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<A NAME="rehash()"><!-- --></A><H3>
rehash</H3>
<PRE>
protected void <B>rehash</B>()</PRE>
<DL>
<DD>Rehashes the contents of the hashtable into a hashtable with a
 larger capacity. This method is called automatically when the
 number of keys in the hashtable exceeds this hashtable's capacity
 and load factor.<DD><DL>
<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="put(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
put</H3>
<PRE>
public <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 hashtable. Neither the key nor the
 value can be <code>null</code>.
 <p>
 The value can be retrieved by calling the <code>get</code> method
 with a key that is equal to the original key.<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 of the specified key in this hashtable,
             or <code>null</code> if it did not have one.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - if the key or value is
               <code>null</code>.<DT><B>Since: </B><DD>JDK1.0</DD>
<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/Hashtable.html#get(java.lang.Object)"><CODE>get(java.lang.Object)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="remove(java.lang.Object)"><!-- --></A><H3>
remove</H3>
<PRE>
public <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 key (and its corresponding value) from this
 hashtable. This method does nothing if the key is not in the hashtable.<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 key had been mapped in this hashtable,
          or <code>null</code> if the key did not have a mapping.<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="clear()"><!-- --></A><H3>
clear</H3>
<PRE>
public void <B>clear</B>()</PRE>
<DL>
<DD>Clears this hashtable so that it contains no keys.<DD><DL>
<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="../../java/lang/String.html">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a rather long string representation of this hashtable.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../java/lang/Object.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../java/lang/Object.html">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a string representation of this hashtable.<DT><B>Since: </B><DD>JDK1.0</DD>
</DL>
</DD>
</DL>
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