jenv

Jenv is a java package manager.

Install it with brew install jenv.

Let's say you have two different JDK versions, 16 and 8.

adoptopenjdk-16.jdk
adoptopenjdk-8.jdk

You'll want to add each JVM to jenv.

jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-16.jdk/Contents/Home/

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

Then, jenv versions should list both versions.

  system
  1.8
  1.8.0.282
* 16 (set by /Users/takashi/.jenv/version)
  16.0
  16.0.1
  openjdk64-1.8.0.282
  openjdk64-16.0.1

You can globally set your default java version with jenv global (version)

jenv global 16 would set the default jdk to 16.