listFiles() of File not working on symbolic links?

You could read the Symbolic LINK

According to what I've seen while Googling this puzzling behavior, Java requires that you call .getCanonicalFile() on a File whose path contains a link before you can use it in other file operations.

So:

File directory = new File("/path/symlink/foo/bar").getCanonicalFile();
String[] files = directory.listFiles();