Applets, jsp:plugin tag and Firefox 3.6

[Marco Tulio Borges]

Hello there! I have a strange problem using the jsp:plugin tag for applets. In Firefox 3.6, the tag was transformed to <embed> and <object>, but Firefox could not find the right plugin to execute the applet. Firefox shows a message stating that I need a plugin for this kind of content, but when I try to download it, it also says that it does not know which plugin (it states that the plugin is needed for the content-type application/x-java-applet). The problem does not occur under IE8. I have Java Plugin installed (jre 6.0 update 20) and applets that use the <applet> tag work just fine.

Has anyone seen this happen before?

The jsp:plugin code:

	<jsp:plugin
		type="applet" code="my.pack.AppletClass.class"
		codebase="applet/"
		archive="one.jar,other.jar"
		align="middle"
		height="315"
		width="260">
		<jsp:params>
			<jsp:param name="mayscript" value="true" />
			<jsp:param name="myParam" value="myValue" />
		</jsp:params>
		<jsp:fallback>My Fallback</jsp:fallback>
	</jsp:plugin>

And the generated code:

<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="260" height="315" align="middle" codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
<param name="java_code" value="my.pack.AppletClass.class">
<param name="java_codebase" value="applet/">
<param name="java_archive" value="one.jar,other.jar">
<param name="type" value="application/x-java-applet;">

<param name="mayscript" value="true">
<param name="myParam" value="myValue">
<comment>
<embed type="application/x-java-applet;" width="260" height="315" align="middle" pluginspage="http://java.sun.com/products/plugin/" java_code="my.pack.AppletClass.class" java_codebase="applet/" java_archive="one.jar,other.jar" mayscript="true" myParam="myValue"/>
<noembed>
Você deve fazer o download e a instalação do J2RE no endereço "http://java.sun.com"
</noembed>
</comment>
</object>

[Ulf Dittmer]

I generally recommend to use the applet tag directly; it's more reliable than the object or embed tags these days.

[Marco Tulio Borges]

You are right, I have been using the applet tag all along, but I thought the jsp:plugin tag was a good option, since it has a fallback option and has the hability to specify the JRE version. Since it isn't working, I'm back on <applet>.

Thank you!