Lots of Java libraries depend on having a JAVA_HOME environment variable set. This’ll make sure we avoid hitting the system Java version. Type cat /Users/powers/.jenv/version to see it’s just a file with a single line openjdk64-1.8.0.272Īll Java commands will be routed to Java 8 now that the global version is set. This command simply writes the version to the /Users/powers/.jenv/version file. Set the global Java version to Java 8 with jenv global openjdk64-1.8.0.265.

jenv makes it easy to avoid using the system Java. It’s always good to avoid using system installed programming language versions (applies to Python and Ruby too). Find the exact name of the version with jenv versions.Ĭheck to make sure the javac -version and java -version commands are working. The exact command on your machine might be something slightly different like jenv global openjdk64-1.8.0.272. Set the global Java version on your computer with jenv global openjdk64-1.8.0.265. List the Java virtual machines with ls -1 /Library/Java/JavaVirtualMachines.Īdd Java 8 to jenv with jenv add /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/. Once Java is downloaded, we need to manually add it to jenv. Here’s the latest command to install Java 8: brew cask install adoptopenjdk/openjdk/adoptopenjdk8.īrew cask install adoptopenjdk8 used to work, but now returns Error: Cask 'adoptopenjdk8' is unavailable: No Cask with this name exists.īrew cask install caskroom/versions/adoptopenjdk8 also used to work, but now returns Error: caskroom/versions was moved. Here’s the output on my machine /Users/powers/.jenv/shims:/Users/powers/.jenv/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin. jenv paths that are prepended to the standard PATH directories. Restart your Terminal, run echo $PATH, and verify the output contains. Run these commands to update your PATH: echo 'export PATH='$HOME/.jenv/bin:$PATH'' > ~/.zshrc Jenv uses the shim design pattern to route commands to the appropriate Java version. This blog post shows you how to get jenv setup on your computer and how to use the important commands. Spark developers should use Java 8 for Spark 2 projects and Java 11 for Spark 3 projects for example. Running multiple Java versions is important for Android and Apache Spark developers. It also makes it easy to seamlessly switch between Java versions when you switch projects. Jenv makes it easy to run multiple versions of Java on a Mac computer.

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