Question

Introduction to Java programming

You will create a secure password.

• Ask a user to enter first name and last name. (Allow for mixed case)
• Create a random integer from 10-99.
• Create the password string that consists of the upper case letter of the last letter of his/her first name, the random number, and the first three letters of his/her last name in lower case.
• Example someone with the name Rob Lee might have a password that looks like B56lee.
• Your print out should then include the person's name and new password in the following format:
• Rob Lee's password is: "B56lee"

You program must dynamically determine the last character from the first name. Do not hardcode the number.

Answer 1

// PasswordGenerator.java

import java.util.Random;
import java.util.Scanner;

public class PasswordGenerator {

        public static void main(String[] args) {
                
                Scanner sc = new Scanner(System.in);
                Random rand = new Random();
                
                // range of numbers from low to high
                int low = 10;
                int high = 99;
                
                // reading first name and last name
                System.out.print("Enter first name  : ");
                String fname = sc.next();               
                System.out.print("Enter last name   : ");
                String lname = sc.next();
                
                // generating random number
                int randNum = rand.nextInt(high-low) + low;
                
                // extracting last character from first name and converting to upper case
                String lastChar =  Character.toString(fname.charAt(fname.length()-1)).toUpperCase();

                // extracting first 3 characters from lastname
                String first3Chars = lname.substring(0,3);
                
                String password = lastChar + randNum + first3Chars;
                
                System.out.println(fname +" "+ lname+"'s password is : \""+password+"\"");
                
                sc.close();
        }

}

Output:

#1

Console X X <terminated> Password Generator [Java Application] C:\Program Files Enter first name : Rob Enter last name : Lee Rob Lee's password is : "B23Lee" 5 Password Generator.java X 1 // Password Generator.java 2 30 import java.util. Random; 4 import java.util.Scanner; 6 public class PasswordGenerator 7 80 public static void main(String[] args) { 9 10 Scanner sc = new Scanner(System.in); 11 Random rand = new Random(); 12 13 1/ range of numbers from low to high 14 int low = 10; 15 int high - 99; 16 17 // reading first name and last name 18 System.out.print("Enter first name : "); 19 String fname = sc.next(); 20 System.out.print("Enter last name : "); String Iname = sc.next(); 23 // generating random number 24 int randNum = rand.nextInt(high-low) + low; 25 26 1/ extracting last character from first name and converting to upper case 27 String lastchar = Character.toString(fname.charAt(fname.length()-1)).toUpp: 28 // extracting first 3 characters from lastname 30 String first3Chars = lname.substring(0,3); 31 String password = lastChar + randNum + first3Chars; System.out.println(fname +" "+ Iname+"'s password is : ""+password+"|""); sc.close(); 36 37 38 39 }

#2

<terminated> Password Generator (Java Application] C:\Program Files Enter first name : Vergara Enter last name : Sofia Vergara Sofia's password is : "A2150f"