Question

Search the web to discover the 10 most common user-selected passwords, and store them in an array. Design a JAVA program that prompts a user for a password, and continue to prompt the user until the user has not chosen one of the common passwords.

Answer 1

Solution:

Look at the code and comments for better understanding...............

Screenshot of the code:

Output:

Code to copy:

import java.util.Scanner;
class Solution
{
        //Store the 10 most common passwords in the array
        //I obtained the passwords from internet
        private static String[] common_pass = {"123456","123456789","qwerty","password","111111",
                                                                                "12345678","abc123","1234567","password1","12345"};
        //a function that takes a password and checks if it is present in the array or not
        public static boolean isNotCommon(String password)
        {
                for(int i=0;i<common_pass.length;i++)
                {
                        //if the password is present in the array return false
                        if(common_pass[i].equals(password))
                                return false;
                }
                //return true if the password is not in the array
                return true;
        }
        public static void main(String[] args)
        {
                Scanner sc = new Scanner(System.in);
                String password;
                //read untill user enters a un common password
                while(true){
                        System.out.print("Enter a Password : ");
                        password = sc.nextLine();
                        //if password is not common break
                        if(isNotCommon(password))
                        {
                                System.out.println("Password Accepted..");
                                break;
                        }
                        System.out.println("Password is too common..");
                }
        }
}

I hope this would help.........................:-))

If you have any doubts please let me know in the comments...............:-))