How to specify correctly codebase and archive in Java applet?

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Attribute codebase specifies the base URL of the applet – the directory that contains the applet’s code. It is used while searching jar files in archive attribute, in such a way that all jars in archive attribute are searched relative to codebase.
So. When you use archive="http://myurl.com/archive/myjar.jar" and codebase="http://myurl.com/classes" together it means: find “http://myurl.com/archive/myjar.jar“ in “http://myurl.com/classes“ folder.
I.e. the full search path is “http://myurl.com/classes/http://myurl.com/archive/myjar.jar“. And of course it can’t be found!
Also, classes, whose jar-files aren’t specified in the archive attribute, can’t be found without codebase attribute. I.e. if there is no codebase then there is no way to find your classes in “http://myurl.com/classes“ folder.

You can find more details in the Deploying With the Applet Tag tutorial.

I suggest the following solution:

  1. Place myjar.jar in the http://myurl.com/classes folder;
  2. Assuming your MyClass.class is in default package, and in the “http://myurl.com/archive/myjar.jar“, the following code should work:
<html>    
<body>
<applet width=600 height=300 code="MyClass" 
  type="application/x-java-applet;jpi-version=6" 
  archive="myjar.jar" 
  codebase="http://myurl.com/classes">
   no applet
</applet>
</body>    
</html>

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