java question

Scanner input = new Scanner(a1.dat);

int mission = input.nextInt();

boolean onMission = input.nextBoolean();

String name = input.nextLine();

System.out.println(name + "has done " + mission + " missions and on Mission states is " + onMission);

a1.dat file contain:

B

false

Crew 41

what is the output? And when i run it i get error "Exception in thread "main" java.util.InputMismatchException", can you fix this issue like create file a1.dat and the code