Question

FOR JAVA:

Summary: Write a program to assess password stringency.

• The solution should be named Password.java.
• Include these steps:
  • Write an application that provides the criteria for a strong password, and accepts a user's password from an input dialog box.
  • If the entered password is less than six characters, more than 10 characters, or does not contain at least one uppercase letter and one digit, prompt the user to enter again.
  • When the user's entry meets all the password requirements, prompt the user to reenter the password, and do not let the user continue until the second password matches the first one.
• Run your program until it works and the output looks nice.

Answer 1

import javax.swing.JOptionPane;

public class Passwordn {

   public static void main(String[] args) {
       String pwd1;
       pwd1 = JOptionPane.showInputDialog("Enter a password ");
       while (true) {
           if (validatePassword(pwd1)) {
               break;
           }
           pwd1 = JOptionPane.showInputDialog("Invalid password: Enter a password ");
       }
       while (true) {
           String p2 = JOptionPane.showInputDialog("confirm password ");
           if (p2.equals(pwd1)) {
               JOptionPane.showMessageDialog(null, "Sucess...!!!");
               break;
           } else {
               JOptionPane.showMessageDialog(null, "Incorrect passowrd. Should match with first password");
           }

       }

   }

   public static boolean validatePassword(String pwd1) {
       if (pwd1.length() < 6 || pwd1.length() > 10) {
           return false;
       }

       if (!checkForUpperCasae(pwd1))
           return false;
       if (!checkNumbers(pwd1))
           return false;
       return true;

   }

   // checks if password has checkForUpperCasae
   public static boolean checkForUpperCasae(String pwd) {
       int count = 0;
       for (int i = 0; i < pwd.length(); i++)
           if (Character.isLetter(pwd.charAt(i)) && Character.isUpperCase(pwd.charAt(i)))
               count++;
       return count >= 1;
   }

   public static boolean checkForLowerCasae(String pwd) {
       for (int i = 0; i < pwd.length(); i++)
           if (Character.isLetter(pwd.charAt(i)) && Character.isLowerCase(pwd.charAt(i)))
               return true;
       return false;
   }

   // checks if password contains digit
   public static boolean checkNumbers(String pwd) {
       int count = 0;
       for (int i = 0; i < pwd.length(); i++)
           if (Character.isDigit(pwd.charAt(i)))
               count++;
       return count >= 1;
   }

}

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