1. Baidu search to download JDK
- Select the download of the windows64 version
3. If you don't have an oracle account, register one, log in if you have one, and you can download
- If you have already installed it and don’t remember where the JDK is installed, right-click the computer icon on the desktop and select properties
5. Find the corresponding jdk directory and delete the folder directly 
. 6. Delete the previous environment variables.
7. Double-click the JDK just downloaded to the desktop.
8. Configure the environment variables.
9. Check whether the configuration is successful.
10. Here, the JDK configuration is successful.