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install-java-on-mac-with-brew.md

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Install Java On Mac With Brew

If you don't already have Java installed on your Mac, you can install it with homebrew.

$ brew install java

This will take a bit to run and when all is complete, you'll go to run something like a version check and see this:

$ java -version
The operation couldn’t be completed. Unable to locate a Java Runtime.
Please visit http://www.java.com for information on installing Java.

This is because OpenJDK the open-source implementation of the Java Development Kit (Java platform) does not get fully set up by homebrew.

You'll need to symlink openjdk and the exact command with correct paths can be found from running the following:

$ brew info openjdk

...

For the system Java wrappers to find this JDK, symlink it with
  sudo ln -sfn /usr/local/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk

...

The paths may look different for you, so copy the exact command and run that. Once the symlink is set, check the version again.

$ java -version
openjdk version "23" 2024-09-17
OpenJDK Runtime Environment Homebrew (build 23)
OpenJDK 64-Bit Server VM Homebrew (build 23, mixed mode, sharing)

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