In international football, once the final squad is announced can injured players be swapped?

For the upcoming Euro 2016 competition, after the final squad has been announced, there are still friendly fixtures. If a player is injured can he be

For the upcoming Euro 2016 competition, after the final squad has been announced, there are still friendly fixtures. If a player is injured can he be swapped ? Or are the squads truly final & would the team be without that player?

or:For the upcoming Euro 2016 competition, after the final squad has been announced, there are still friendly fixtures. If a player is injured can he be swapped ? Or are the squads truly final & would the team be without that player?

Tags:injured,competition,