Java versions

README.md

Install and use different Java Versions

Source: https://stackoverflow.com/questions/52524112/how-do-i-install-java-on-mac-osx-allowing-version-switching

Installation

• Update the formulae and Homebrew itself

brew update

• Add the casks tap

brew tap homebrew/cask-versions

• Look for Java Versions

brew search java

• Check the details on the version that will be installed

brew cask info java

• Install the latest version available:

brew cask install java

• To find locations of previously installed Java JDK's installed at the default system locations:

/usr/libexec/java_home -V

To manually switch between Java versions:

• Add to your .bash_profile different env variables for the different Java Versions:

export JAVA_8_HOME=$(/usr/libexec/java_home -v1.8)
export JAVA_11_HOME=$(/usr/libexec/java_home -v11)
export JAVA_14_HOME=$(/usr/libexec/java_home -v14)

• Create different aliases to switch between versions

alias java8='export JAVA_HOME=$JAVA_8_HOME'
alias java11='export JAVA_HOME=$JAVA_11_HOME'
alias java14='export JAVA_HOME=$JAVA_14_HOME'

• Default to whatever version you want in your .bash_profile

java8

• Install Java

• Note: Tested with Java 15

brew install adoptopenjdk

• Search for Java casks:

brew search --casks --desc 'adoptopenjdk'

Manage your Java Environment with jEnv

jEnv is a command line tool to help you forget how to set the JAVA_HOME environment variable.

• By using jEnv, you could also add a .java-version to each of your Java projects and jEnv will take care of switching the JDK automagically.