Need help with strange Class#getResource() issue

Question

I have some legacy code that reads a configuration file from an existing jar, like:

URL url = SomeClass.class.getResource(\"/configuration.properties\");
//          


        

Answer 1

A typical implementation of ClassLoader.getResourceAsStream is:

public InputStream getResourceAsStream(String name) {
    URL url = getResource(name);
    try {
        return url != null ? url.openStream() : null;
    } catch (IOException e) {
        return null;
    }
}

Class.getResource and getResourceAsStream behave the same as each other.

So it looks like either you are using a strange and broken subclass of ClassLoader, or there is some mistake in the tests on your side.