The following steps will guide you through the installation of Java on macOS.
First, check the available Java related formulas:
% brew search java
==> Formulae
app-engine-java java javacc jslint4java pdftk-java
google-java-format java11 javarepl libreadline-java Currently, there are two different version of Java: java and java11. To check the version of both, you can use the following commands:
% brew info java
openjdk: stable 16.0.1 (bottled) [keg-only]
Development kit for the Java programming language
https://openjdk.java.net/
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/openjdk.rb
License: GPL-2.0-only with Classpath-exception-2.0% brew info java11
openjdk@11: stable 11.0.10 (bottled) [keg-only]
Development kit for the Java programming language
https://openjdk.java.net/
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/openjdk@11.rb
License: GPL-2.0-onlyDepending on your requirements, you can install one of the above. For me, some of the libraries I use in Dart are currently not compatible with the latest Java version (16.0.1), so I decided to install Java 11 with LTS (long term support).
% brew install java11This will install Java version 11.0.10 as listed in the output above. The output also shows the following hints:
For the system Java wrappers to find this JDK, symlink it with
sudo ln -sfn /usr/local/opt/openjdk@11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdk
openjdk@11 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.
If you need to have openjdk@11 first in your PATH, run:
echo 'export PATH="/usr/local/opt/openjdk@11/bin:$PATH"' >> ~/.zshrc
For compilers to find openjdk@11 you may need to set:
export CPPFLAGS="-I/usr/local/opt/openjdk@11/include"For me it was necessary to called the specified command, so that the system finds the java binary:
sudo ln -sfn /usr/local/opt/openjdk@11/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk-11.jdkTo see if Java was installed correctly, you can check the version of Java:
% java --version
openjdk 11.0.10 2021-01-19
OpenJDK Runtime Environment (build 11.0.10+9)
OpenJDK 64-Bit Server VM (build 11.0.10+9, mixed mode)That’s it!
Photo by Adam Wilson on Unsplash
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