richman,
I take it you are not a professional Pilot.
Airlines in the ME recruit pilots who already have significant experience as Direct Entry FOs, and have from time to time taken Direct Entry Captains.
This is reserved for pilots who are already qualified and have the required Hours operating jets elsewhere (for instance, EK requires 2500 Jet hours to join as a DEFO), but are open to all nationalities.
Cadet schemes are to train people with no or little previous experience as SOs or FOs. They are long and costly and usually reserved for citizens of the Airlines home country.