How to Uninstall Temurin

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Title: How to Uninstall Temurin: A Step-by-Step Guide

Temurin, formerly known as AdoptOpenJDK, is a build of the Open Java Development Kit (OpenJDK) that provides a high-quality alternative to other JDK releases. It is widely used in various computing environments, from personal computers to enterprise servers. There may come a time, however, when you need to uninstall Temurin from your system due to an update, migration to a different JDK distribution, or simply to free up resources. This article provides a comprehensive guide on how to uninstall Temurin from your system.

### Uninstalling Temurin on Windows

To remove Temurin from a Windows-based system, follow these steps:

1. **Open the Control Panel:**

– Press `Win + R` to open the Run dialog.

– Type `control` and press Enter.

2. **Navigate to Programs and Features:**

– Click on “Programs” and then on “Programs and Features.”

3. **Find Temurin in the list:**

– Look for Temurin or the version of AdoptOpenJDK you have installed.

4. **Uninstall the program:**

– Click on Temurin and then on the “Uninstall” button above the list or right-click and select “Uninstall.”

5. **Follow the Uninstallation Wizard:**

– Follow the prompts in the uninstallation wizard to complete the process.

6. **Reboot (if prompted):**

– Some installations may require a system reboot to finalize the uninstallation process.

### Uninstalling Temurin on macOS

For macOS users, the uninstallation process involves a few terminal commands:

1. **Open the Terminal:**

– You can find the Terminal application in the Utilities folder within the Applications folder.

2. **Identify the installation path:**

– Typically, Temurin is installed in `/Library/Java/JavaVirtualMachines`. Use the following command to list the installed JDKs:


/usr/libexec/java_home -V


3. **Remove the JDK directory:**

– Based on the information from the previous step, remove the Temurin directory. Replace `temurin-{version}.jdk` with the appropriate directory name for the version you wish to uninstall:


sudo rm -rf /Library/Java/JavaVirtualMachines/temurin-{version}.jdk


4. **Clear any remaining links (if necessary):**

– Some applications may rely on symbolic links to the JDK. If applicable, remove these too:


sudo rm /Library/Java/Home

sudo rm -rf /System/Library/Frameworks/JavaVM.framework


### Uninstalling Temurin on Linux

The uninstallation process for Temurin on Linux systems can vary depending on the distribution and package manager used. Here’s how to do it on systems using the `apt` package manager, commonly found in distributions like Ubuntu and Debian:

1. **Open the Terminal:**

2. **Uninstall Temurin:**

– Use the following command to remove the Temurin package:


sudo apt-get remove temurin-{version}-jdk


– Replace `{version}` with the version number of the Temurin you want to uninstall.

3. **Autoremove dependencies (optional):**

– Execute the following command to remove any unused dependencies:


sudo apt-get autoremove


### Post-Uninstallation Steps

1. **Verify Removal:**

– On all systems, verify the uninstallation by attempting to check the version of Java:


java -version


– If Temurin was successfully uninstalled, this command should either give an error or show a different version if another JDK was installed.

2. **Clean up Environment Variables:**

– Especially on Windows and Linux, make sure to check the environment variables. Look for `JAVA_HOME` and remove or update it if necessary.

3. **Check for Other Java Versions:**

– If you have multiple Java installations, ensure that your system is pointing to the correct version if you’re planning to continue using Java. Update paths and environment variables accordingly.

By following these steps, you should be able to successfully uninstall Temurin from your system. If you encounter any issues during the process, consult the documentation specific to your operating system or reach out to the Temurin community for assistance. Remember that uninstalling any piece of software should be done with care to avoid impacting other applications on your system.