only seems to validate the protocol <https://docs.oracle.com/javase/8/docs/api/java/net/URL.html#URL...

# announcements

[Bernhard]

only seems to validate the protocol https://docs.oracle.com/javase/8/docs/api/java/net/URL.html#URL-java.lang.String-

[Egor Trutenko]

Because everything else is basically valid url if it has protocol 🤔
You might want to just google regexes to validate domain names, if you're implying that