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j2ee的API 1.4版本,j2ee的帮助文档

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<TD WIDTH="15%"><B><A HREF="../../javax/ejb/TimedObject.html" title="interface in javax.ejb">TimedObject</A></B></TD>
<TD>The TimedObject interface contains the callback method that 
 is used to deliver timer expiration notifications.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/Timer.html" title="interface in javax.ejb">Timer</A></B></TD>
<TD>The Timer interface contains information about a timer
 that was created through the EJB Timer Service.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/TimerHandle.html" title="interface in javax.ejb">TimerHandle</A></B></TD>
<TD>The TimerHandle interface is implemented by all EJB timer handles.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/TimerService.html" title="interface in javax.ejb">TimerService</A></B></TD>
<TD>The TimerService interface provides enterprise bean components 
 with access to the container-provided Timer Service.  </TD>
</TR>
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<P>

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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Exception Summary</B></FONT></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/AccessLocalException.html" title="class in javax.ejb">AccessLocalException</A></B></TD>
<TD>An AccessLocalException is thrown to indicate that the caller does not 
 have permission to call the method. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/CreateException.html" title="class in javax.ejb">CreateException</A></B></TD>
<TD>The CreateException exception must be included in the throws clauses of
 all create methods defined in an enterprise Bean's home 
 interface. 

 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/DuplicateKeyException.html" title="class in javax.ejb">DuplicateKeyException</A></B></TD>
<TD>The DuplicateKeyException exception is thrown if an entity EJB object 
 cannot be created because an object with the same key already exists.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/EJBException.html" title="class in javax.ejb">EJBException</A></B></TD>
<TD>The EJBException exception is thrown by an enterprise Bean instance to 
 its container to report that the invoked business method or callback method
 could not be completed because of an unexpected error (e.g. the instance 
 failed to open a database connection).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/FinderException.html" title="class in javax.ejb">FinderException</A></B></TD>
<TD>The FinderException exception must be included in the throws clause
 of every findMETHOD(...) method of an entity Bean's home interface.

 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/NoSuchEntityException.html" title="class in javax.ejb">NoSuchEntityException</A></B></TD>
<TD>The NoSuchEntityException exception is thrown by an Entity Bean 
 instance to its container to report that the invoked business method 
 or callback method could not be completed because of the underlying
 entity was removed from the database. 

 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/NoSuchObjectLocalException.html" title="class in javax.ejb">NoSuchObjectLocalException</A></B></TD>
<TD>A NoSuchObjectLocalException is thrown if an attempt is made to invoke
 a method on an object that no longer exists.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/ObjectNotFoundException.html" title="class in javax.ejb">ObjectNotFoundException</A></B></TD>
<TD>The ObjectNotFoundException exception is thrown by a finder method to
 indicate that the specified EJB object does not exist.

 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/RemoveException.html" title="class in javax.ejb">RemoveException</A></B></TD>
<TD>The RemoveException exception is thrown at an attempt to remove
 an EJB object when the enterprise Bean or the container does not allow 
 the EJB object to be removed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/TransactionRequiredLocalException.html" title="class in javax.ejb">TransactionRequiredLocalException</A></B></TD>
<TD>This exception indicates that a request carried a null transaction context, 
 but the target object requires an active transaction.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../javax/ejb/TransactionRolledbackLocalException.html" title="class in javax.ejb">TransactionRolledbackLocalException</A></B></TD>
<TD>This exception indicates that the transaction associated with
 processing of the request has been rolled back, or marked to roll
 back. </TD>
</TR>
</TABLE>
&nbsp;

<P>
<A NAME="package_description"><!-- --></A><H2>
Package javax.ejb Description
</H2>

<P>
The javax.ejb package contains the Enterprise JavaBeans classes 
and interfaces that define the contracts between the enterprise bean 
and its clients and between the enterprise bean and the EJB container.
<P>

<P>
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