Question

Task Intro: Password JAVA.

Write a method that checks a password. The rules for the password are:

- The password must be at least 10 characters.
- The password can only be numbers and letters.
- Password must have at least 3 numbers.

Write a test class that tests the checkPassword method.

Hint: You can (really should) use method from built-in String class:

public boolean matches(String regex)

to check that the current string matches a regular expression. For example, if the variable "password" is the string to be checked, so will the expression.

password.matches("(?:\\D*\\d){3,}.*") 

return true if the string contains at least 3 numbers. Regular expression "^ [a-zA-Z0-9] * $" can be used to check that the password contains only numbers and letters.

Let your solution consist of 4 methods:

checkPassword(string password) [only test this method]
checkPasswordLength(string password) [checkPassword help method]
checkPasswordForAlphanumerics(string password) [checkPassword help method]
checkPasswordForDigitCount(string password) [checkPassword help method]

Answer 1

Write a method that checks a password and The rules for the password are:

import java.util.Scanner;

class ValidatePassword {

publics static void main (String [] args) {

String inputPassword;

Scanner input = new Scanner (System.in);

System.out.print("Password: ");

inputPassword= input.next();

System.out.println(PassCheck(inputPassword));

System.out.println("");

main(args);

}

public static String PassCheck (String Password) {

String result = "Valid Password";

int length = 0;

int numCount = 0;

int capCount = 0;

for (int x =0; x < Password.length(); x++)

{

if ((Password.charAt(x) >= 47 && Password.charAt(x) <= 58) || (Password.charAt(x) >= 64 && Password.charAt(x) <= 91) ||

(Password.charAt(x) >= 97 && Password.charAt(x) <= 122))

{

}

else

{

result = "Password Contains Invalid Character!";

}

if ((Password.charAt(x) > 47 && Password.charAt(x) < 58))

{

numCount ++;

}

if ((Password.charAt(x) > 64 && Password.charAt(x) < 91))

{

capCount ++;

}

length = (x + 1);

}

if (numCount < 3)

{

result = "Not Enough Numbers in Password!";

}

if (capCount < 2) {

result = "Not Enough Capital Letters in Password!";

}

if (length < 8){

result = "Password is Too Short!";

}

return (result);

}

}

@thank you