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> ## Including an Applet

> You can include an applet or a JavaBeans component in a JSP page by using the `jsp:plugin` element. This element generates HTML that contains the appropriate client-browser-dependent construct (`<object>` or `<embed>`) that will result in the download of the Java Plug-in software (if required) and the client-side component and in the subsequent execution of any client-side component. The syntax for the `jsp:plugin` element is as follows:

>     <jsp:plugin
>       type="bean|applet"
>       code="objectCode"
>       codebase="objectCodebase"
>       { align="alignment" }
>       { archive="archiveList" }
>       { height="height" }
>       { hspace="hspace" }
>       { jreversion="jreversion" }
>       { name="componentName" }
>       { vspace="vspace" }
>       { width="width" }
>       { nspluginurl="url" }
>       { iepluginurl="url" } >
>       { <jsp:params>
>         { <jsp:param name="paramName" value= paramValue" /> }+
>       </jsp:params> }
>       { <jsp:fallback> arbitrary_text </jsp:fallback> }
>     </jsp:plugin>

> The `jsp:plugin` tag is replaced by either an `<object>` or an `<embed>` tag as appropriate for the requesting client. The attributes of the `jsp:plugin` tag provide configuration data for the presentation of the element as well as the version of the plug-in required. The `nspluginurl` and `iepluginurl` attributes override the default URL where the plug-in can be downloaded.

> The `jsp:params` element specifies parameters to the applet or JavaBeans component. The `jsp:fallback` element indicates the content to be used by the client browser if the plug-in cannot be started (either because `<object>` or `<embed>` is not supported by the client or because of some other problem).

> If the plug-in can start but the applet or JavaBeans component cannot be found or started, a plug-in-specific message will be presented to the user, most likely a pop-up window reporting a `ClassNotFoundException`.

> The Duke's Bookstore page `/template/prelude.jspf` creates the banner that displays a dynamic digital clock generated by `DigitalClock` (see Figure 12-3).

> Figure 12-3 Duke's Bookstore with Applet

> Here is the `jsp:plugin` element that is used to download the applet:

>     <jsp:plugin
>       type="applet"
>       code="DigitalClock.class"
>       codebase="/bookstore2"
>       jreversion="1.4"
>       align="center" height="25" width="300"
>       nspluginurl="http://java.sun.com/j2se/1.4.2/download.html"
>       iepluginurl="http://java.sun.com/j2se/1.4.2/download.html" >
>       <jsp:params>
>         <jsp:param name="language"
>           value="${pageContext.request.locale.language}" />
>         <jsp:param name="country"
>           value="${pageContext.request.locale.country}" />
>         <jsp:param name="bgcolor" value="FFFFFF" />
>         <jsp:param name="fgcolor" value="CC0066" />
>       </jsp:params>
>       <jsp:fallback>
>         <p>Unable to start plugin.</p>
>       </jsp:fallback>
>     </jsp:plugin>

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