Java JDK 8 Fedora 28 Installation Guide
The linked Tutorials Show You Step-by-Step How to Install Java JDK 8 Fedora 28 GNU/Linux.
Especially relevant, there are two JDK 8 Releases:
- Oracle JDK 8
- OpenJDK 8
The Oracle JDK is the Official one and the OpenJDK is the Base Including nearly all the Former’s features.