If a basketball player throws the ball off the backboard the ball does not hit the rim and he catches the ball is that travelling?

Probably no. If you shoot it OVER the rim and it hits nothing, it will go out of bounds and be awarded to the other team.

If the shot is from the corner, a team mate could get a rebound and pass it back.

So, possibly, but not likely.

AnswerNo, that would be considered travelling.

Well think about this if you shoot the ball over the backboard it will likely go out of court and tha ball will be awarded to the other team. but also even if you did shoot the ball over the backboard it is called a voilation of the rules so the other team will get the ball so most likely the other team will get the Basketball even if the same team catches the ball