The document at http://java.sun.com/j2se/1.4.2/docs/guide/security/jce/HowToImplAJCEProvider.html references example source (MyJCE.java) that:

1) Does not implement the guideline in the "Creating a JarFile Referring to the JAR File" to "prep" the URL:

// Prep the url with the appropriate protocol.
jarURL =
    url.getProtocol().equalsIgnoreCase("jar") ?
    url :
    new URL("jar:" + url.toString() + "!/");

This step is critical on systems for which the "jar:" protocol is not used, such as Oracle's J2EE implementation.

2) Probably won't compile.
###@###.### 2005-04-26 05:09:10 GMT
###@###.### 2005-04-27 05:39:48 GMT