Скачать или смотреть How to Remove Java Installed by Homebrew on Ubuntu

Learn how to easily remove Java installed via Homebrew on Ubuntu and switch to Java 8 for your projects.
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This video is based on the question https://stackoverflow.com/q/76209828/ asked by the user 'Sachin Sheelavant' ( https://stackoverflow.com/u/12075299/ ) and on the answer https://stackoverflow.com/a/76209896/ provided by the user 'Maninder' ( https://stackoverflow.com/u/6280135/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Remove Java Installed by Homebrew on Ubuntu

If you’ve unintentionally installed Java through Homebrew on your Ubuntu system and need to switch to an older version like Java 8 for compatibility with your project, you’re not alone. Many users find themselves in this situation due to dependencies from various tools. In this post, we'll guide you through the process of removing Java installed by Homebrew and configuring your system to use the desired version.

Understanding the Problem

After installing a tool via Homebrew, you may notice that it also installs various dependencies, including Java 20 in some cases. This can result in unexpected behaviour when you try to run Java commands. For instance, executing commands like:

[[See Video to Reveal this Text or Code Snippet]]

returns version details for Java 20, but you need Java 8 for specific project requirements.

In such situations, checking the installed Java version will show something like this:

[[See Video to Reveal this Text or Code Snippet]]

Additionally, the output of the command:

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might reveal:

[[See Video to Reveal this Text or Code Snippet]]

Meanwhile, trying to configure alternatives with:

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results in a message indicating that there is only one alternative available, which is Java 8 in this scenario.

Step-by-Step Solution to Remove Java Installed by Homebrew

1. Uninstall Java

To remove Java installed via Homebrew, you'll want to use the appropriate brew uninstall command.

Run the following command in your terminal:

[[See Video to Reveal this Text or Code Snippet]]

This will uninstall Java without affecting any other dependencies that might be needed for your other Homebrew packages.

2. Set Up the Correct Java Environment

After uninstalling Java, you need to make sure your system recognizes Java 8. This involves exporting the correct path to your shell configuration file. Depending on your shell, you'll need to update either .bashrc or .zshrc.

For Bash Users

If you're using Bash, open the .bashrc file:

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Add the following line to set Java 8 as the default:

[[See Video to Reveal this Text or Code Snippet]]

For Zsh Users

If you’re using Zsh, open the .zshrc file instead:

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Add the same line as above.

3. Apply the Changes

Once you have updated your shell configuration file, you need to apply the changes. For Bash, run:

[[See Video to Reveal this Text or Code Snippet]]

For Zsh, you would run:

[[See Video to Reveal this Text or Code Snippet]]

4. Verify the Installation

Finally, run the following commands to verify that you are now using Java 8:

[[See Video to Reveal this Text or Code Snippet]]

If everything was configured correctly, you should see version information for Java 8.

Conclusion

By following the steps outlined above, you can successfully remove Java installed by Homebrew on your Ubuntu system and switch to Java 8. This allows you to maintain compatibility with your projects and ensure a smooth development experience. If you encounter any issues during the process, don’t hesitate to reach out for help or consult further documentation. Happy coding!