I just got an Java update notification that Update 17 is out, so I ran the update and found that only my public JRE was updated. I still only have Update 16 of the JDK.
On MacOS, java can now be installed through the Homebrew package manager. After installing Homebrew, you can simply run:
java
brew cask install java
to install the latest java version. It can then be kept up using
brew cask reinstall java