OS X에서 jenv를 이용한 JDK 버전관리

Java 버전 확인

$ java -version

openjdk version "11.0.9" 2020-10-20
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.9+11)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.9+11, mixed mode)

설치되어 있는 Java 목록 확인

$ /usr/libexec/java_home -V

Matching Java Virtual Machines (4):
    11.0.9, x86_64:	"AdoptOpenJDK 11"	/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home
    10.0.2, x86_64:	"AdoptOpenJDK 10"	/Library/Java/JavaVirtualMachines/adoptopenjdk-10.jdk/Contents/Home
    1.8.0_272, x86_64:	"AdoptOpenJDK 8"	/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
    1.7.0_80, x86_64:	"Java SE 7"	/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home

homebrew를 이용한 OpenJDK 설치

최신 버전 설치

$ brew cask install adoptopenjdk

버전별 설치

$ brew cask install adoptopenjdk13

jenv 를 이용한 버전 관리

jenv 설치

• github

$ brew install jenv

jenv에 version를 추가

$ jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-13.jdk/Contents/Home

jenv에 추가된 versions 확인

$ jenv versions

  1.7
  1.7.0.80
  1.8
  1.8.0.272
  11
  11.0
  11.0.9
  12
  12.0
  12.0.2
  13
  13.0
  13.0.2
  openjdk64-1.8.0.272
  openjdk64-11.0.9
  openjdk64-12.0.2
  openjdk64-13.0.2
  oracle64-1.7.0.80

jenv에 plugin 추가

$ jenv enable-plugin maven
$ jenv enable-plugin export

jenv를 이용하여 JDK 버전 변경

$ jenv global 1.8.0.272
$ jenv local 1.8.0.272

# 변경 전 확인
$ java -version
openjdk version "13.0.2" 2020-01-14
OpenJDK Runtime Environment AdoptOpenJDK (build 13.0.2+8)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 13.0.2+8, mixed mode, sharing)

# 변경 시도
$ jenv global 1.8.0.272

# 변경 후 확인
$ java -version
openjdk version "1.8.0_272"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_272-b10)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.272-b10, mixed mode)