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I have a Lotus Notes database which is performing some interaction with a remote web service. I've written a custom Java class to perform the interaction. The class methods can be executed from one of three locations depending on the user's setup: Within a Java script library called via a Lotus Notes Java agent Within a JAR file located in the user's "jvm/lib/ext" directory Within a JAR file located in a custom directory within the user's "jvm/lib" directory (for example, "jvm/lib/custom_dir"). The Lotus Notes JVM is aware of the custom directory via usage of the "JavaUserClassesExt" local notes.ini variable. Within my class I would simply like to be able to return the location the current class is executing from. So if it's executing from either option 2 or option 3, then return the JAR file path. If it's executing from option 1 then return something else which I can handle. I've tried the following. getProtectionDomain() method getClass().getProtectionDomain().getCodeSource().getLocation() Which results in: java.security.AccessControlException: Access denied (java.lang.RuntimePermission getProtectionDomain) There is no option to change any security settings on any clients running this. Class.getResource method String myName = "/" + getClass().getName().replace('.', '/') + ".class"; URL myResourceURL = getClass().getResource(myName); Result: myResourceURL is ALWAYS null. ClassLoader.getResource method String myName2 = getClass().getName().replace('.', '/') + ".class"; ClassLoader myCL = getClass().getClassLoader(); URL myResourceURL2 = myCL.getResource(myName); Result:</stron

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