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Editorial Team
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Asked: 2026-06-13T01:49:15+00:00

I have made test.jar file and Applet1.html file both are placed on a web

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I have made test.jar file and Applet1.html file both are placed on a web server. test.jar runs perfectly by itself on my local computer but when placed on the server it does not run at all and the following error comes up: 

Application Error
RuntimeException
java.lang.reflect.InvocationTargetException

HTML to call the test.jar

<applet 
code="MainClass.class" 
width="400" height="400" 
archive="test.jar"
alt="Error Loading Applet?!" >
</applet>

Very basic applet (hello world) works fine but when I make a .jar out of it it does not work.

This link has the two files used:

Could someone help me solve this?

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1 Answer

  1. Editorial Team
    MainClass cannot be cast to java.applet.Applet

    The MainClass which runs so well at home is not an applet. Double clicking the Jar launches a frame titled “Java Game”.

    Launch the frame directly from a link using Java Web Start.

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