Go to Oracle’s official website to download and the default display is the download of JDK16 version. I will directly post the download address of JDK8’s official website to save everyone from spending time looking for it. Address:
jdk8 official website download page
If the jump fails, check it on your mobile phone
Choose the version that suits your computer to download. If you install it, go directly to the next step. Some tutorials mentioned that jre needs to be installed, so you can decide whether to download it or not.
JDK: Java Development kit------The software used to write Java programs
JRE: Java Runtime Environment------The software JDK used to run Java programs
contains JRE. If you want to write Java programs, you need to install JDK; if you just run Java programs, you only need to install JRE separately.
For environment variable configuration, put a picture that I think is well explained and clear at a glance:
