How to get ResourceBundle files out of classpath?

I am using a ResourceBundle for different languages (en, de, fr, …) and the Keys are listed in a .properties file. It works great, but only using the classpath in the function getBundle().

Now, if I build my project as an executable JAR file, I can’t maintain those properties/dictionary files. How can I go on to get those files out of the JAR file and use them (probably with a relative path)?

Answer

Check this if it’s helpful. The thread lists a way to achieve this using absolute path (not relative).

Inlining the code from link:

File file = new File("/languages");
URL[] urls = {file.toURI().toURL()};
ClassLoader loader = new URLClassLoader(urls);
ResourceBundle bundle = ResourceBundle.getBundle("english", Locale.getDefault(), loader);

Also from URLs:

    URL[] urls = new URL[1];
 
    // - startfolder on the server, where he can find the package-structure like this.BUNDLE_NAME (http://somedomain.com/jws-stuff/com/myexample/test/)
    urls[0] = new URL("http://somedomain.com/jws-stuff/"); 
    ClassLoader loader = new URLClassLoader(urls);
    RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME, Locale.GERMAN, loader);