mac安装jenv(java版本控制器)

安装homebrew(默认您没安装)

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

安装jenv

brew install jenv

设置环境变量

echo 'export PATH="$HOME/.jenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(jenv init -)"' >> ~/.bash_profile

查看是否安装成功

 jenv

显示结果如下表示安装成功

jenv 0.4.4
Usage: jenv <command> [<args>]

Some useful jenv commands are:
   commands    List all available jenv commands
   local       Set or show the local application-specific Java version
   global      Set or show the global Java version
   shell       Set or show the shell-specific Java version
   rehash      Rehash jenv shims (run this after installing executables)
   version     Show the current Java version and its origin
   versions    List all Java versions available to jenv
   which       Display the full path to an executable
   whence      List all Java versions that contain the given executable

See `jenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/hikage/jenv#readme

将现有的jdk添加到jenv管理

jenv add /Library/Java/JavaVirtualMachines/1.8.0.jdk/Contents/Home jdk1.8 added

• 其实就是建立了一个软链接等价于下面的命令

cd ~/.jenv/versions/
ln -s /Library/Java/JavaVirtualMachines/1.8.0.jdk/Contents/Home jdk1.8

tips: macos的jdk和linux的jdk不一样mac的就得用os的jdk否则会报错如下

cannot execute binary file //无法执行二进制文件

查看现有的版本

$ jenv versions
  system
* jdk1.8 (set by /Users/zhangfei/.jenv/versions/.java-version)

*代表当前使用中的版本

切换java版本

jenv local jdk11

设置全局

jenv global jdk11