Comment by pron

Note that FFM requires that you explicitly allow the use of native code with --enable-native-access (and soon JNI will, too: https://openjdk.org/jeps/8307341). As JEP 454 (https://openjdk.org/jeps/454) states:

> To allow code in a module M to use unsafe methods without warnings, specify the --enable-native-access=M option on the java launcher command line. Specify multiple modules with a comma-separated list

The warnings will become errors in a later release.

This means that no library you're using (even some transitive dependency) can call native code without you, the application author, knowing about it. This restriction on native code is part of the work on "integrity by default": https://openjdk.org/jeps/8305968