Focus is not obtained by MenuBar after pressing F10/Alt keys (according to UI specification http://xdesign.us.oracle.com/projects/javaFX/fxcontrols-ue/specifications/menubar/Menubar-UESpec.html). It is transferred to window system menu (in that sense that subsequent pressing of ARROW-DOWN leads to system window menu opening). MenuBar obtains focus only after second F10/Alt click .
JDK-8128072 [MenuBar] Unable to navigate within menubar
- is blocked by
JDK-8119274 KeyEvents like right, left arrow are not received by event filter call back on Windows only.
- relates to
JDK-8127437 MenuBar: focused state is not displayed