This Fedora package installs JavaFX 8 in a JDK/JRE-independent way. It is
up to each JDK/JRE to make use of it correctly. In general, you want to symlink
the shared object and the jar into somehwere where the JDK/JRE can find it.

The process looks something like this:
openjfx_dir=/usr/lib/jvm/openjfx8

jdk_files=$(find $openjfx_dir/{bin,lib} -type f -print)
for file in $jdk_files; do
  relative=${file#$openjfx_dir/}
  ln -sfv "$openjfx_dir/$relative" "/usr/lib/jvm/java/$relative"
done

jre_files=$(find $openjfx_dir/rt -type f -print)
for file in $jre_files; do
  relative=${file#$openjfx_dir/rt/}
  ln -sfv "$openjfx_dir/rt/$relative" "/usr/lib/jvm/jre/$relative"
done