Install Java 8 on OS X: https://www.cyanhall.com/posts/notes/7.homebrew-cheatsheet/#java

Java.md

Update: https://www.cyanhall.com/posts/notes/7.homebrew-cheatsheet/#java

on El Capitan, after installing the brew...

$ brew update
$ brew tap caskroom/cask
$ brew install Caskroom/cask/java

And Java 8 will be installed at /Library/Java/JavaVirtualMachines/jdk1.8.xxx.jdk/

Check version:

$ java -version 
java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)

@madwyn brew cask install java isn't working with error

==> Downloading http://download.oracle.com/otn-pub/java/jdk/9.0.4+11/c2514751926
######################################################################## 100.0%
curl: (6) Could not resolve host: download.oracle.com

curl: (22) The requested URL returned error: 408 Request Time-out
Error: Download failed on Cask 'java' with message: Download failed: http://download.oracle.com/otn-pub/java/jdk/9.0.4+11/c2514751926b4512b076cc82f959763f/jdk-9.0.4_osx-x64_bin.dmg
The incomplete download is cached at /Users/hareentej22/Library/Caches/Homebrew/Cask/java--9.0.4,11:c2514751926b4512b076cc82f959763f.dmg.incomplete

Thanks @bogste! @JeOam might be worth updating since you've got high results on google w/ this Gist?

Need Java8 but accidentally installed latest java12. What's the procedure to uninstall 12?

--- Nevermind. I did it with:
brew cask uninstall java

Cask 'java8' is unavailable: '/usr/local/Homebrew/Library/Taps/caskroom/homebrew-versions/Casks/java8.rb' does not exist.

Update: caskroom/versions was moved. Tap homebrew/cask-versions instead.
brew cask install homebrew/cask-versions/java8