PasswordStrengthChecker.java

import java.util.Scanner;

public class PasswordStrengthChecker {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter your password: ");
        String password = sc.nextLine();

        boolean hasUpper = false;
        boolean hasLower = false;
        boolean hasDigit = false;
        boolean hasSpecial = false;

        for (int i = 0; i < password.length(); i++) {
            char ch = password.charAt(i);

            if (Character.isUpperCase(ch)) {
                hasUpper = true;
            } else if (Character.isLowerCase(ch)) {
                hasLower = true;
            } else if (Character.isDigit(ch)) {
                hasDigit = true;
            } else {
                hasSpecial = true;
            }
        }

        int score = 0;

        if (password.length() >= 8)
            score++;
        if (hasUpper)
            score++;
        if (hasLower)
            score++;
        if (hasDigit)
            score++;
        if (hasSpecial)
            score++;

        System.out.println("\nPassword Analysis:");
        System.out.println("Length (>=8): " + (password.length() >= 8));
        System.out.println("Uppercase Letter: " + hasUpper);
        System.out.println("Lowercase Letter: " + hasLower);
        System.out.println("Number: " + hasDigit);
        System.out.println("Special Character: " + hasSpecial);

        if (score == 5) {
            System.out.println("\nPassword Strength: Strong");
        } else if (score >= 3) {
            System.out.println("\nPassword Strength: Medium");
        } else {
            System.out.println("\nPassword Strength: Weak");
        }

        sc.close();
    }
}