To download the latest version of JDK, you can follow these general steps:

1. Visit the official Oracle JDK download page (https://www.oracle.com/java/technologies/javase-downloads.html).

2. Look for the latest JDK version available for download. The available versions may have changed since my last update.

3. Accept the license agreement.

4. Choose the download link corresponding to your operating system (e.g., Windows, macOS, Linux).

5. Download the installer or archive file for your platform.

6. Once the download is complete, run the installer or extract the archive, depending on the file you downloaded.

7. Follow the installation instructions to install JDK 18 on your system.

Please keep in mind that starting from JDK 11, Oracle has changed its licensing and distribution policies. You may need to review and understand Oracle’s licensing terms, especially for commercial use, as they have specific terms and conditions.