Using Java Applets

IE publications compiled with HTML Executable can run Java applets, although support for any Java applet is not guaranteed. A Java Virtual Machine is required.

For instance, the Java applet below was working with Oracle Java JVM (update 8 build 77).

Some guidelines

In order for Java applets to work in a compiled HTMLEXE publication, you’ll have to:

• place your CLASS files into a JAR file with correct manifest.
• sign your JAR file with a valid certificate (fortunately the same as for code signing the EXE file can be used).
• use the built-in HTTP server as explained below to serve JAR files to the JVM.
• make sure end users have added http://localhost to their “Exception Site List” Java setting. Otherwise, the applet won’t load.
• a security prompt is displayed to all end users asking them whether they want to run the applet or not.

Modifications to use the built-in server

The codebase attribute of applet tags must be explicitly written with JavaScript in the HTML document. In fact, the codebase should be set to the root path of the built-in HTTP server.

<script>
    var localpath = window.external.GetGlobalVariable('HEBuiltInServerHost', ''); 
    document.write('<applet codebase="' + localpath + 
    '" code="Clock3D.class" align="bottom" width="200" height="200">'); 
</script>

Working demonstration

The following Java applet is a “3D clock”:

You should see the applet like on this screenshot:

The HTML code used:

<script type="text/javascript">
var localpath = window.external.GetGlobalVariable('HEBuiltInServerHost', ''); 
document.write('<applet codebase="' + localpath + 
'" code="Clock3D.class" archive="clock3d.jar" align="bottom" width="200" height="200">'); 
</script>
<param name="fps" value="18" /><param name="a1" value="12500" 
/><param name="pixd" value="29" /><param name="pixangle" value="5" 
/><param name="radius" value="26" /><param name="roty" value="-4" 
/><param name="rotx" value="0" /><param name="rotz" value="0.401" 
/><param name="irotx" value="0" /><param name="iroty" value="0" /><param 
name="irotz" value="00" /><param name="color" value="#00FF66" /><param 
name="bgcolor" value="#000000" /><param name="12hour" value="0" 
/></applet>

Credit: Bennet Uk

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