I write this code but I really don't get meaning of error?

Question

Help me fix this error or give breif explanation if possible for first user widthwal will get successful but for second some exception error is occurring?
See below code
https://code.sololearn.com/chi9YuuTPGE2/?ref=app

Answer 1

You can't create a new scanner twice. The second will not have access to the input. The exception occured when you attempted to read an integer from the second scanner as there was nothing available.

Answer 2

Move the scanner so it is created only once like this:
https://code.sololearn.com/cpgKlAHbmDjy

Answer 3

So what's is the solution for this I want two user to concurrently access same account for widthdrawal of money.

Answer 4

https://code.sololearn.com/cVSWfwBtTPWX/?ref=app