This article is a memorandum of understanding for those who are thinking about getting started with Java but don't know what to do.
The above is the Oracle page. First of all, let's download it from here. This time we will install the new Java SE 14.
If you click on the part of the image that says JDK Download, the following screen will appear.
What you have to be careful about here is that you have to install the files corresponding to your OS. Since I'm a Mac, I've selected Download for macOS Installer. Since SE14 is already installed in my PC, I can't describe the procedure from here, but I think that it can be installed if you follow the installer.
As of May 08, 2020, it seems that JavaSE14 is the latest, but please note that some apps may not work if it is the latest.
This is the development environment construction. I hope it will be a starting point for everyone.