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
