Java ‐ Install JDKs

Install JDKs

Our Java services currently run on either Java 8 or Java 11.

Install Homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

brew tap homebrew/cask-versions

brew install openjdk@8

sudo ln -sfn /usr/local/opt/openjdk@8/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-8.jdk

brew install openjdk@11

sudo ln -sfn /usr/local/opt/openjdk@11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdk

/usr/libexec/java_home -V

Since different services run on different JRE’s, switching between JDK versions is necessary when running the build commands from the command line.

Add the following to ~/.zshrc (or ~/.bashrc if using bash)

 jdk() {

   version=unset JAVA_HOME;

   export JAVA_HOME=$(/usr/libexec/java_home -v"$version");

   java -version

 }

source ~/.zshrc

% jdk 1.8

openjdk version "1.8.0_312"

OpenJDK Runtime Environment (build 1.8.0_312-bre_2021_10_20_23_15-b00)

OpenJDK 64-Bit Server VM (build 25.312-b00, mixed mode)

% jdk 11

openjdk version "11.0.12" 2021-07-20

OpenJDK Runtime Environment Homebrew (build 11.0.12+0)

OpenJDK 64-Bit Server VM Homebrew (build 11.0.12+0, mixed mode)

java -version