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I want to install OpenJDK Java on Mac OSX and have it work alongside other JDK's since it is a newer release. Currently, I downloaded the tar.gz and placed it in my path but that is hard to maintain.The only other install I found that do more things automatically is the install via Homebrew cask. It looks like only the current version too: brew cask info javaShows:java: 12,33So I can install from there, but then what? Am I stuck only with the new version?Update: As of March 19, 2019 the Homebrew cask is now pointing to OpenJDK 12. Note: These solutions work for various versions of Java including Java 11 and the new Java 12, and for any other previous Java version covered by the listed version managers. This includes alternative JDK's from OpenJDK, Oracle, IBM, Azul, Amazon Correto, Graal and more. Easily work with Java 7, Java 8, Java 9, Java 10, Java 11, Java 12, and even early access Java 13!You have a few options of how to do the installation as well as manage JDK switching.
Installation can be done by Homebrew, or a manual install. Switching can be done by, or manually by setting JAVAHOME. All of these are described below. InstallationFirst, install Java using whatever method you prefer including Homebrew, SDKMAN or a manual install of the tar.gz file.
The advantages of a manual install is that the location of the JDK can be placed in a standardized location for Mac OSX. Install with SDKMANThis is a simple model in that it handles both installation and version switching, with a caveat that it installs the JDK into a non-standard directory.
Install using JabbaThis is also a simple model in that both installation and version switching are handled by the same tool. The installations are made to a non-standard directory. Install manually from OpenJDK download page:.Download OpenJDK for Mac OSX from.Unarchive the OpenJDK tar, and place the resulting folder (i.e. Jdk-12.jdk) into your /Library/Java/JavaVirtualMachines/ folder since this is the standard and expected location of JDK installs.
You can also install anywhere you want in reality.Install with HomebrewThe version of Java available in Homebrew Cask previous to October 3, 2018 was indeed the Oracle JVM. Now however, it has now been updated to OpenJDK. Be sure to update Homebrew and then you will see the lastest version available for install.if you haven't already.
Manually switching system-default version without 3rd party tools:As detailed in, on macOS /usr/bin/java is a wrapper tool that will use Java version pointed by JAVAHOME or if that variable is not set will look for Java installations under /Library/Java/JavaVirtualMachines/ and will use the one with highest version. This is how I did it.Step 1: Install Java 11You can download Java 11 dmg for mac from here:Step 2: After installation of Java 11. Confirm installation of all versions.
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Type the following command in your terminal. /usr/libexec/javahome -VStep 3: Edit.bashprofile sudo nano /.bashprofileStep 4: Add 11.0.1 as default. (Add below line to bashprofile file). Export JAVAHOME=$(/usr/libexec/javahome -v 11.0.1)to switch to any version export JAVAHOME=$(/usr/libexec/javahome -v X.X.X)Now Press CTRL+X to exit the bash. Press 'Y' to save changes.Step 5: Reload bashprofile source /.bashprofileStep 6: Confirm current version of Java java -version.
