安装最新版JDK

brew cask install adoptopenjdk

安装某个特定版本的jdk：

brew tap AdoptOpenJDK/openjdk
brew cask install adoptopenjdk8
brew cask install adoptopenjdk9

参考文献

[1].How can I install java openjdk 8 on High Sierra. ​​https://apple.stackexchange.com/questions/334384/how-can-i-install-java-openjdk-8-on-high-sierra​​