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Whenever you I navigate to this directory or a sub-directory of it, then jenv will ensure that Java 12 will be used. java-version file in the directory with the specified version.

For example to set Java 12 for OpenWhisk, I navigate to ~/Project/openwhisk and type: I like to set a given Java version on a per-directory basis using jenv local. Update: with newer version of jenv, use jenv local * system (set by /Users/rob/.jenv/version) Jenv’s versions will provide you a list of the available versions on your system: ls /Library/Java/JavaVirtualMachines/ will tell you. The exact versions depend on what you have installed. $ jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/ $ jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-12.jdk/Contents/Home/ $ jenv add /Library/Java/JavaVirtualMachines/jdk-15.0.1.jdk/Contents/Home/ Nowadays there are many JRE packages available from a variety of projects and companies. The next step is to add our Java versions to jenv: The Java Runtime Environment (JRE) is required to run Java programs. Restart your terminal to pick up the change. We now add jenv to our terminal by adding the following to. Looking around the Internet, I discovered jenv which shouldn’t have surprised me as I use pyenv and I’m aware of rbenv too.Īs I use Homebrew, these are the commands I used.įirstly install jenv, the latest Java (15 at this time) and any other versions you need. In this post we learned how to install any version of Java on Mac using Homebrew.When working on OpenWhisk, I discovered that it needed a different Java to the one I had installed. Then, you can use the aliases to switch between different Java versions: $ java8 bash_profile for the aliases to take effect: $ source ~/.bash_profile In this case, we want to be able to switch between Java8 and Java11: export JAVA_8_HOME=$(/usr/libexec/java_home -v1.8)Įxport JAVA_11_HOME=$(/usr/libexec/java_home -v11)Īlias java8='export JAVA_HOME=$JAVA_8_HOME'Īlias java11='export JAVA_HOME=$JAVA_11_HOME' If you want to switch between different versions of Java, you need to add the following to your. Switch Between Different Versions of Java To install previous or specific versions of JDKs, you can get them from AdoptOpenJDK: $ brew tap adoptopenjdk/openjdk Install Specific Versions of Java (Java8, Java11, Java13) To install the latest version of Java, all you need to do is: $ brew cask install java Install Latest Version of Java Using Brew Next, install Homebrew Cask $ brew tap homebrew/cask-versions If not, you can install it via: $ ruby -e "$(curl -fsSL )" Pre-requisitesīefore we start, make sure you have Homebrew installed on your Mac. In this article we show how to install Java on Mac using Homebrew, and how to allow to switch between different versions such as Java8, Java11, Java13 and latest Java version. You can have multiple versions of Java on your Mac.