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 password: ");
        String password = sc.nextLine();

        int score = 0;

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

        if (password.length() >= 8) {
            score++;
        }

        for (char ch : password.toCharArray()) {
            if (Character.isUpperCase(ch)) hasUpper = true;
             else if (Character.isLowerCase(ch))hasLower = true;
             else if (Character.isDigit(ch))hasDigit = true;
             else hasSpecial = true;
        }

        if (hasUpper) score++;
        if (hasLower) score++;
        if (hasDigit) score++;
        if (hasSpecial) score++;

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

        sc.close();
    }
}