PasswordApp.java

import java.util.Scanner; // Import Scanner class for reading user input

public class PasswordApp { // Main application class
    public static void main(String[] args) { // Main method, entry point of the program
        Scanner input = new Scanner(System.in); // Create a Scanner object to read input from the keyboard

        System.out.println("How many times would you like to run the application?"); // Prompt user for number of runs
        int runs = input.nextInt(); // Read integer input for number of runs
        input.nextLine(); // Clear the newline character left in the input buffer

        String[] allPasswords = new String[runs]; // Create an array to store all generated passwords

        for (int i = 0; i < runs; i++) { // Loop to run the application the number of times specified
            System.out.println("Run #" + (i + 1)); // Display current run number

            // Get the user's forename and surname
            System.out.println("Enter forename and surname (lowercase, e.g., 'daniel murphy'):");
            String name = input.nextLine(); // Read the full line (forename and surname)

            // Get the value of n (3, 4, or 5) with input validation
            int n = 0; // Initialize n
            while (n != 3 && n != 4 && n != 5) { // Keep looping until n is valid
                System.out.println("Enter a number (3, 4, or 5):"); // Prompt for n
                n = input.nextInt(); // Read integer input for n
                input.nextLine(); // Clear the newline character left in the input buffer
            }

            // Get the special character to replace the space
            System.out.println("Enter a special character (e.g., @, #, $, %, &, *):");
            String specialInput = input.nextLine(); // Read the line as a string
            char specialChar = specialInput.charAt(0); // Get the first character from the input string

            // Create a PasswordGenerator object using the provided inputs
            PasswordGenerator pg = new PasswordGenerator(name, n, specialChar);

            // Compute the password by applying all processing steps
            pg.computePassword();

            // Retrieve the final generated password
            String finalPassword = pg.getFinalPassword();

            // Display the generated password to the user
            System.out.println("Generated Password: " + finalPassword);

            // Store the password in the array for later strength evaluation
            allPasswords[i] = finalPassword;
        }

        // Create a dummy PasswordGenerator object just to call the evaluatePasswordStrength method
        PasswordGenerator checker = new PasswordGenerator("", 3, '*'); // Empty values because we only need the method

        // Display the password strength evaluation results
        System.out.println("\nPassword Strength Results:");
        checker.evaluatePasswordStrength(allPasswords); // Call method to evaluate and display strength of each password

        // Indicate that the application has finished
        System.out.println("Application finished.");
        
    }
}