Question about InputMismatchException while using Scanner

Question

The question :

Input file: customer’s account number, account balance at beginning of month, transaction type (withdrawal, deposit, in

Answer 1

This is how I would proceed:

• look up what that Exception means in the API documentation.
• think of how it could happen, what line it happens on (look at your stack trace). If you don't know how to read the stacktrace, here's a tutorial.
• if you can't immediately see the reason, set a breakpoint and run it through your debugger to "visualize" the current state of your program before the exception happens.

You might not know how to use your debugger yet, and while some might not agree, I think it's never too early. There are some excellent video tutorials on how to use the debugger here. Good luck!