In Java how do I find out what languages I have available my Resource Bundle

Question

I have some resource bundles packaged in my main jar

widget_en.properties
widget_de.properties

I retrieve a resource bundle based on my de

Answer 1

If you can make two basic assumptions:

1) You have a default resource bundle with no locale, or at least one locale that you know is there.

2) All your resources are in the same location (ie. the same path within a single jar file)

Then you can get the URL for a single resource:

URL url = SomeClass.class.getClassLoader().getResource("widget.properties");

once you have that, you should be able to parse the URL.

If you use commons-vfs, you should be able to convert the URL into a FileObject:

FileSystemManager manager = VFS.getManager();
FileObject resource = manager.resolveFile(url.toExternalForm());
FileObject parent = resource.getParent();
FileObject children[] = parent.getChildren();
// figure out which ones are bundles, and parse the names into a list of locales.

This will save you the trouble of dealing with the complexities of jar: style url's and such, since vfs will handle that for you.