Question

Write a Java method to check whether a string is a valid password.

Password rules:
A password must have at least ten characters.
A password consists of only letters and digits.
A password must contain at least two digits.

There are at least SIX functions/methods as the following:

1. menu() – to print the password’s rules.

2. getString() – to get the password from the user.

3. isPassword() – to check either the password is valid based on the given rules. 4

. getChar() - to get the input from the user, either ‘y’ or ‘n’.

5. isLetter() – to check the password to be a letter from ‘A’ to ‘Z’.

6. isNumric() – to check the password to be a number from ‘0’ to ‘9’.

Answer 1

fprintf("1.A password must have at least eight characters.\n") fprintf("2.A password consists of only letters and digits.\n") fprintf("3.A password must contain at least two digits .\n") password=input("Input a password (You are agreeing to the above Terms and conditions.):",'s');

len= length (password);

valid=true;

if len<8 valid=false; else digit_count =0; for i= 1:len ch=password (i);. if ch>='0'&&ch<='9' digit_count=digit_count+

1; elseif(ch<'a' II ch>'z') &&. (ch<'A' II ch>'z') valid=false; end end if digit_count<2 valid =false; end end

if valid printf("password is valid :%S\n", password). else. printf("password is invalid:%S\n", password) end