Chapter 9, Problem 5PC

Password Verifier

Program Plan:

The detail of “PasswordDemo” class is shown below:

• In the “main()” method,
  • Declare the required variable.
  • Read the password input from user.
  • Check whether the password is valid or not. If yes,
    • Display the error message to user.
    • Otherwise, display the valid password message to user.
  • Exit the system.

The detail of “PasswordVerifier” class is shown below:

• Declare and initialize the minimum password length.
• In the isValid() method,
  • Declare the variable.
  • Check whether the password is valid or not. If yes,
    • Set the status as “true”.
  • Otherwise, set the status as “false”.
  • Return the status.
• In the hasUpperCase() method,
  • Declare the variable.
  • The for loop executes until length of string. If yes,
    • Check the string has at least one uppercase character. If yes, set the status as “true”.
  • Return the status.
• In the hasLowerCase() method,
  • Declare the variable.
  • The for loop executes until length of string. If yes,
    • Check the string has at least one lowercase character. If yes, set the status as “true”.
  • Return the status.
• In the hasDigit() method,
  • Declare the variable.
  • The for loop executes until length of string. If yes,
    • Check the string contains numeric digit. If yes, set the status as “true”.
  • Return the status.