英文:
How can I install openjdk 8 and sbt on mac and have openjdk 8 (not 13) the default one?
问题
安装Java 8和sbt可以使用brew和/或brew cask进行，我遇到的问题是brew将Java 13安装为sbt的依赖项，我不知道回到Java 8作为默认版本的通用方法，因为可能有很多种选择Java版本的方式，其中一些我知道的包括PATH，JAVA_HOME，ln -s，java_exec选择器。另一个潜在的问题是，brew install sbt会安装brew install java，而这是Java 13，但我通过brew cask安装的是Java 8。TL表示Java 13或14可能会导致一些问题，例如测试失败，我是否应该坚持使用OpenJdk，Scala，SBT的最新版本？
英文:
Installing java 8 and sbt with brew and/or brew cask is clearly possible,
The problem I am hitting is that brew installs java 13 as sbt dependency,
And I do not know a general way to go back to java 8 as default, since there are so many ways potentially to opt between java version some of which i am aware include PATH, JAVA_HOME, ln -s, java_exec selector.
Another problem potentially is that brew install sbt installs brew install java which is 13,
But java 8 I install it via brew cask.
The TL is saying that Java 13 or 14 might be causing some issues e.g. tests fails, should I push for latest versions of OpenJdk, Scala, SBT, etc?
答案1
得分: 5
的确，SDK Man是一个选择。
它实际上也适用于brew，但只需要进行一些手动步骤：以下是这些步骤：
安装sbt、java8、jenv并配置Shell
我们使用brew安装sbt（它会安装java 13），并使用brew cask安装openjdk java 8，就像这样：
brew install sbt
brew tap AdoptOpenJDK/openjdk
brew cask install adoptjava8
我们将使用jenv来管理java版本，具体信息请参见https://github.com/Homebrew/homebrew-core/issues/31390
基本上，接下来的步骤是：
brew install jenv
jenv init -
echo 'eval "$(jenv init -)"' >> ~/.bash_profile
echo 'eval "$(jenv init -)"' >> ~/.zprofile
jenv add <path-to-java8-Home-Dir>
然后重新启动你的终端，现在你应该能够运行sbt
在撰写时，<path-to-java8-Home-Dir> 是 /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home。
英文:
Indeed, SDK Man is an option.
It actually works with brew also but there need to be just a few manual steps: here they are:
Installing sbt, java8, jenv & configure the shell
We used brew to install sbt (which in its turn installs java 13), and brew cask to install openjdk java 8, like this:
brew install sbt
brew tap AdoptOpenJDK/openjdk
brew cask install adoptjava8
We will use jenv to manage the java versions, with the information from https://github.com/Homebrew/homebrew-core/issues/31390
Basically the next steps are:
brew install jenv
jenv init -
echo 'eval "$(jenv init -)"' >> ~/.bash_profile
echo 'eval "$(jenv init -)"' >> ~/.zprofile
jenv add <path-to-java8-Home-Dir>
Then restart your terminal and you should now be able to run sbt
Where at time of writing <path-to-java8-Home-Dir> is /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
答案2
得分: 3
看看类似 Sdk Man 这样的工具。
它是跨平台的，允许您将任何所需的JDK设置为默认版本。
同时，在需要时还可以将其更改为另一个提供程序/版本。
英文:
Have a look at a utility like Sdk Man.
It is multi-platform and allows you to set any desired JDK as a default one.
As well as changing it to another provider/version when it will be required.
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