Chapter 7, Problem 8PP

Shoulder surfing

Program Plan:

• Import required package.
• Define “AuthenticateTest” class.
  • Define main function.
    • Initializes actual PIN.
    • Create an array “randomDigits” for randomly generated digits.
    • Create an array “userEnteredDigits” for digits entered by the user.
    • Generate random numbers from “1” to “3” for each digit using for loop.
    • Display the sequence of PIN and NUM to screen.
    • Display “10” digits random numbers for “NUM”.
    • Create object for scanner class.
    • Display user prompt statement.
    • Read the five digits PIN number from user.
    • Extract the digits from the code and store in the “userEnteredDigits” array.
      • Convert char to corresponding digit.
    • Check whether the user entered password is equal to random PIN number of actual PIN numbers by calling the method “checkValidPassword()”.
      • If it is match, then display the message “Your password matches correctly!”.
      • Otherwise, display the message “Invalid password.”.
    • Define the boolean method “checkValidPassword()” with three arguments
      • Check PIN numbers one by one using “for” loop. If the user entered PIN is not equal to actual PIN, then returns “false”.