p.62
We read:
Once again, we can use lambda expressions instead of creating an anonymous inner class. Let’s look at an example of listing all hidden files in the current directory.
final File[] files = new File(".").listFiles(file -> file.isHidden());
Interesting, unlike the other approaches, this one does not generate an exception when the file under examination, here .
, does not exist or is not a directory. Should that be mentioned?