Mac（Mojave）にjava6と7と8をインストール

お仕事の都合でJava 6と7と8をインストール。

support.apple.com

Java6はこれ、しかたない。7と8はhomebrewで。AdoptOpenJDKでいこうと思ったけれどJava7はなかったので7はZuluのをインストール

$ brew tap AdoptOpenJDK/openjdk
$ brew cask install adoptopenjdk8

$ brew tap homebrew/cask-versions
$ brew cask install zulu7

$ /usr/libexec/java_home -V
Matching Java Virtual Machines (4):
    1.8.0_222, x86_64:  "AdoptOpenJDK 8"    /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
    1.7.0_232-zulu-7.31.0.5, x86_64:    "Zulu 7"    /Library/Java/JavaVirtualMachines/zulu-7.jdk/Contents/Home
    1.6.0_65-b14-468, x86_64:   "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
    1.6.0_65-b14-468, i386: "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home

$ export JAVA_HOME=$(/usr/libexec/java_home -v 1.7)
$ java -version
openjdk version "1.7.0_232"
OpenJDK Runtime Environment (Zulu 7.31.0.5-CA-macosx) (build 1.7.0_232-b6)
OpenJDK 64-Bit Server VM (Zulu 7.31.0.5-CA-macosx) (build 24.232-b6, mixed mode)