Validate Password in Java

1import java.util.Scanner;
2import java.util.regex.Pattern;
3
4public class Main {
5    public static void main(String[] args) {
6        Scanner sc = new Scanner(System.in);
7        System.out.print("Enter password: ");
8        String pwd = sc.nextLine();
9
10        // At least 8 chars, one digit, one lower, one upper
11        String regex = "^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).{8,}$";
12        boolean strong = Pattern.matches(regex, pwd);
13        System.out.println(strong ? "Strong password" : "Weak password");
14        sc.close();
15    }
16}