If you download the .tar.gz for OpenJDK 11 direct from http://jdk.java.net/11/, there's no obvious install instructions (at least that I can find) either on the OpenJDK website on in the .gz file. If you've done any fiddling with different JDK versions on MacOS before, you've probably come across the ‘/usr/libexec/java_home' utility (see here for my previous article about this utility, and answers to this StackOverflow post which includes one of the most extensive and useful guides to running different JDK versions on MacOS that I've seen) which does a number of useful things relating to which JDK you're currently using in your PATH:
Installing Java OpenJDK on macOS Catalina Posted on September 28, 2018 by Paul. Updated 15 October 2019. This is a short note about getting started with Java 11 LTS or Java 13 on macOS Catalina. As you probably know, starting with Java 11 there was a big change in the license under which the official Oracle JDK is provided.
- JDK 15.0.1 General-Availability Release. This page provides production-ready open-source builds of the Java Development Kit, version 15, an implementation of the Java SE 15 Platform under the GNU General Public License, version 2, with the Classpath Exception.
- Oracle and Apple have announced the OpenJDK project for Mac OS X, a move that will make Apple's Java technology available to open source developers. OpenJDK (aka Open Java Development Kit) is a.
/usr/libexec/java_home : shows you were the current JDK home is, eg:
/usr/libexec/java_home -V : lists all installed JDKs, e.g.:
To switch between JDKs, use /usr/libexec/java_home -v version (e.g. 10):
Knowing that your available JDKs are installed to /Library/Java/JavaVirtualMachines/ by default, moving the contents of the downloaded OpenJDK 11 dir from inside the .gz file to the same location would make sense.
Once you've moved it there, java_home -V now shows the new JDK in place:
Openjdk Source Download
Updating my aliases to quickly switch versions in my .bash_profile, I now have:
Sourcing the .bash_profile (source .bash_profile) and then running each alias, now I've got OpenJDK 11 set up and ready to go!
Openjdk 8 For Mac Os X
The following are the system requirements for installing the JDK and the JRE on macOS:
Openjdk For Macos
Any Intel-based computer running macOS.
Administrator privileges.
You cannot install Java for a single user. Installing the JDK and JRE on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK and JRE on macOS.
When you install the JDK, it also installs the JRE. However, the system will not replace the current JRE with a lower version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
When you install the JRE, you can install only one JRE on your system at a time. The system will not install a JRE that has an earlier version than the current version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
Note:
Installing a JRE from Oracle will not update
java -versionsymlinks or addjavato your path. To do this, you must install the JDK.
