Running JShell 16-ea on Linux and passing an empty Path to Files.isHidden() throws an ArrayIndexOutOfBoundsException:

jshell> Files.isHidden(Path.of(""))
| Exception java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
| at UnixFileSystemProvider.isHidden(UnixFileSystemProvider.java:355)
| at Files.isHidden (Files.java:1637)
| at (#30:1)

Using an empty Path on Windows returns a value without throwing an exception:

jshell> Files.isHidden(Path.of(""))
$1 ==> false