adding relative directory to java classpath and using ClassLoader().getResourceAsStream("")

Is it possible to add a relative directory (ie, foo/bar/plugh) to the java classpath and use InputStream in = getClassLoader().getResourceAsStream("xyzzy.properties"); To fetch foo/bar/plugh/xyzzy.properties? My classpath looks like this: foo.jar;foo/bar/plugh;xyz.jar And I am able to use classes and resources from both foo and xyz jars but not from the plugh directory. In those cases, `in` is always null. I can't get this to work and am not sure if this is just unsupported, I am missing something subtle or if I'm doing something wrong. Do I need to use an absolute path?
How did you set this classpath? Like the following example? java -classpath foo.jar;foo/bar/plugh;xyz.jar

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