apache-spark needs Java 8

[minhtule]

This is the error message

[Running] brew install git watch tree python scipy numpy graphviz scala redis memcached apache-spark ffmpeg httpie boost curl wget webp libxml2 libyaml archey gnupg gnupg2 carthage swiftlint packer
Warning: libyaml 0.1.7 is already installed
apache-spark: Java 1.8 is required to install this formula.
JavaRequirement unsatisfied!
You can install with Homebrew-Cask:
 brew cask install caskroom/versions/java8

Perhaps, we need to add the installation of java8 before

[ekampf]

I removed it