I was playing basketball when i accidentally hurt my little finger. it's swollen, black & blue, no pain and bendable. what?

Finger sprain??: Needs a physical examination by a doctor licensed in your area as difficult to make precise comments. May if in doubt after examination even require an X-ray. Here is some general information on soft tissue finger injuries: https://www.hey.nhs.uk/patient-leaflet/soft-tissue-injury-finger/ However please consult a doctor to make sure no other serious injuries need to be exclude

Be seen: I would recommend being seen and likely getting an X-ray just to make sure you do not have a displaced fracture.