This article shows how to install Java JDK on macOS, Homebrew package manager, manual installation, and switch between different JDK versions.
- I a using the latest MacOS catalina(10.15.4) and using.zshrc for my profile as latest version of mac deprecated the bash shell, This is the follow-up question of my previous unanswered question on not able to change the default java version to 1.8 using jenv.
- Homebrew install latest Java on macOS. 1.1 Install and upgrade Homebrew. 1.2 brew search java to find all available Java-related formula.% brew search java Formulae app-engine-java java javacc jslint4java pdftk-java google-java-format java11 javarepl libreadline-java. 1.3 brew info to show the formula details.
ADDITIONAL SYSTEM INFORMATION: Mac OS Catalina, version 10.15.5. A DESCRIPTION OF THE PROBLEM: to run my program Vectorworks 2015, I need to reinstall java 6, because of an upgrade, it's not working anymore.
Tested with
- macOS 11 Big Sur
- Homebrew 2.7.4
- JDK 8, 14, 16, 16 (AdoptOpenJDK and OpenJDK)
Topics
P.S At the time of writing, the latest JDK GA is JDK 15, and the early access build is JDK 16.
Note
Since macOS 10.15 Catalina, the default Terminal shell switch from the bash (Bourne-again shell) to zsh (Z shell). And we should move all the startup scripts and environment variables in ~/.bash_profile or ~/.bashrc to ~/.zshenv or ~/.zshrc. Csco game for android.
Also, read this Zsh Startup Files.
1. Homebrew install latest Java on macOS
1.1 Install and upgrade Homebrew.
1.2 brew search java to find all available Java-related formula.
1.3 brew info to show the formula details.
The java formula is always containing the latest Java JDK (OpenJDK) GA version; at the time of writing, the latest GA is JDK 15.
The java11 formula is containing the Java 11 LTS version.
1.4 brew install java to install the latest JDK 15.
1.5 Where does Homebrew install the java?
Homebrew installed the JDK files and directories at /usr/local/Cellar/openjdk/, and symbolic link at /usr/local/opt/openjdk points to the latest Java 15.0.1 version.
1.6 The java formula is keg-only, which means it is installed in /usr/local/Cellar but not linked into places like /usr/local/bin or /Library/Java/JavaVirtualMachines/ (macOS /usr/bin/java wrapper).
For macOS /usr/bin/java wrapper to find the installed JDK, we manually create a symbolic link at /Library/Java/JavaVirtualMachines/.
1.7 Done.
2. Homebrew install Java 8 on macOS
2.1 Install and upgrade Homebrew.
2.2 The brew search java has no java8?
2.3 The Java 8 is available at the openjdk@8 formula. The openjdk is the same as the java formula, and it always contains the latest JDK GA version; the openjdk@11 is the same as the java11 formula, containing JDK 11.
2.4 We can use the openjdk@8 formula to install Java 8 on macOS.
2.5 The openjdk@8 is also a keg-only; we need to create a symbolic link so that the macOS java wrapper can find it.
2.6 Done.
2.7 What if we have multiple Java versions installed?
We can update the $PATH at ~/.zshrc, so that the macOS can find the correct installed Java.
$JAVA_HOME
Alternatively, we can set the $JAVA_HOME environment variable on macOS.
3. Homebrew install a specified Java (AdoptOpenJDK) on macOS.
The adoptopenjdk/openjdk tap containing a lot of different JDK (AdoptOpenJDK) versions.
Rollercoaster tycoon world pc. 3.1 Add a new tap (third party repository) adoptopenjdk/openjdk.
3.2 Search related adoptopenjdk formula.
3.3 We pick adoptopenjdk14 Jet slalom. formula to install the JDK 14.
Java Se 6 Macos Catalina
3.4 The adoptopenjdk formula creates the JDK home directly in the /Library/Java/JavaVirtualMachines/.
3.5 Since the JDK home is already in /Library/Java/JavaVirtualMachines/, we do not need to create any symbolic link, just export $PATH and point it to the correct adoptopenjdk-14.jdk.
Note
Also read this Switch adoptopenjdk cask to use pkg #73145
4. Manual install Java (Early-Access Builds) on macOS.
For some reasons, we need to install Java on macOS manually:
Java 6 Macos Catalina
- Anti-Homebrew, developers love to control everything.
- The JDK build doesn’t exist in the Homebrew repository, like the early-access builds, or Oracle JDK.
P.S At the time of writing, the JDK early-access build is JDK 16.
4.1 Access the JDK 16 early access build website and download the JDK.
4.2 Extracts the downloaded tar.gz file to /Library/Java/JavaVirtualMachines
4.3 Update $PATH and point to the /Library/Java/JavaVirtualMachines/jdk-16.jdk
4.4 Test JDK 16.
Done.
5. Switch between different JDK versions
From the above example 1 to example 4, we have installed four JDK versions on macOS.
5.1 List all the JDK versions on macOS.
5.2 Add the below function in the ~/.zshrc (for macOS 10.15 Catalina, and above) or ~/.bashrc (before macOS 10.15 Catalina).
P.S Create the file ~/.zshrc if it doesn’t exists.
5.3 Source the ~/.zshrc to reflect the changes.
5.4 Switch between different JDK versions.
Further Reading
How to set $JAVA_HOME environment variable on macOS.