Welcome to the Javaranch. You must have missed our
naming policy on the way in. In short, we require everyone to use a real-sounding first and last name, separated by a space. You can change your display name
here.
You should have a look at our FAQ,
How To Ask Questions On JavaRanch. Your question is very light on details. What did you try? What problems did you have? Are you sure the JDK did not install? Why?
I did a Google search for "fedora java" and the first hit is the
Fedora Java FAQ. Have you looked at that document?