- Oracle put all JDK source codes on the OpenJDK repository.
- Oracle won't provide free JDK distribution in a future release. Oracle will provide only commercial binary distribution. It's built from source code in the OpenJDK repository.
- Some providers will build OpenJDK binary distribution from OpenJDK repository. AdoptOpenJDK, Zulu, and other providers will provide free binary distribution.
- Both 2. and 3. contains same features.
As a result, we can use free binary distribution.
(Of course, there's an OpenJDK rpm in CentOS' yum repo. You can use it.)