Question

In Java

Answer 1

import java.util.Scanner;

class PasswordVerifier {

private final static int MIN_PASSWORD_LENGTH = 6;

public static boolean isValid(String str) {

return str.length() >= MIN_PASSWORD_LENGTH && hasUpperCase(str) && hasLowerCase(str) && hasDigit(str);

}

private static boolean hasUpperCase(String str) {

for (int i = 0; i < str.length(); i++)

if (Character.isUpperCase(str.charAt(i)))

return true;

return false;

}

private static boolean hasLowerCase(String str) {

for (int i = 0; i < str.length(); i++)

if (Character.isLowerCase(str.charAt(i)))

return true;

return false;

}

private static boolean hasDigit(String str) {

for (int i = 0; i < str.length(); i++)

if (Character.isDigit(str.charAt(i)))

return true;

return false;

}

}

public class PasswordDemo {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Enter password");

String pass = sc.nextLine();

if (PasswordVerifier.isValid(pass)) {

System.out.println("Valid password");

} else {

System.out.println("Invalid password");

}

}

}

$Console 3 <terminated> PasswordDemo [Java Application] C:\Program Files Java Enter password Koti@246 Nalid password$