Adoptium (formerly known as AdoptOpenJDK) is an organization that provides prebuilt, high-quality, and free-to-use OpenJDK (Java Development Kit) binaries. They offer a variety of OpenJDK distributions, including the Adoptium Temurin JDK, which is a popular choice for Java development. Here are the steps to install Adoptium JDK:

1. Visit the Adoptium Website:

   Go to the Adoptium website at https://adoptium.net/.

2. Choose Your JDK Version:

   On the Adoptium website, you can choose the version of the JDK you want to download. They provide options for different versions of Java, including LTS (Long-Term Support) and non-LTS versions. Click on the version you prefer.

3. Select the JVM Flavor and Platform:

   You’ll need to choose the flavor of the JDK (HotSpot or Eclipse OpenJ9) and the platform (e.g., Windows, macOS, Linux) that matches your system. Make the appropriate selections and click on the download button for your chosen distribution.

4. Download the JDK Package:

   After selecting the JDK version, flavor, and platform, you’ll be redirected to a download page. Click on the download link for the JDK package. This will typically be a compressed archive file (e.g., .tar.gz for Linux, .dmg for macOS, .zip for Windows).

5. Install the Adoptium JDK:

   Once the download is complete, follow the installation instructions for your specific platform:

   • For Windows: If you downloaded a .zip file, extract it to a directory of your choice. You can set the JAVA_HOME environment variable to the JDK installation directory for convenience.

   • For macOS: If you downloaded a .dmg file, open it, and then drag the JDK package to the Applications folder.

   • For Linux: If you downloaded a .tar.gz file, extract it to a directory of your choice. You can set the JAVA_HOME environment variable to the JDK installation directory for convenience.

6. Verify the Installation:

   Open a terminal or command prompt and run the following command to verify that the Adoptium JDK is installed: