Assignment 1 Solution

Concepts tested by this program:

ArrayList

Tooltips

Mnemonic

Read Files

Javadoc

JUnit Tests

Exceptions




Create an application that will check for valid passwords. The following rules must be followed to create a valid password.




At least 8 characters long
At least 1 numeric character
At least 1 uppercase alphabetic character
At least 1 lowercase alphabetic character
No more than 2 of the same character in a sequence
Hello123 – OK

AAAbb123 – not OK

Aaabb123 – OK




Operation:

When the application begins, the user will be presented with a screen that states the above instructions for creating a password, two text entry boxes for typing in a password, and three buttons.

If the user wants to check a single password, they will type in the password in both boxes and select the “Check Password” button.

If the user wants to read in and check a list of passwords, they will select the “Check Passwords in File” button, be presented with a file explorer, and select the file to read from. Those passwords that failed the check will be displayed, with their error message.

If the user presses the “Alt” key, a letter will be underlined in each button label. That letter is the “mnemonic” that can used as a shortcut(Alt plus the letter) to execute the button.

If the user hovers his cursor over a button, a tooltip will be shown.

Specifications:




The Data Element

String

The Data Structure

ArrayList of Strings

The Data Manager

Create a PasswordChecker class that implements PasswordCheckerInterface. The PasswordChecker class will have at least two methods: One method that checks the validity of one password that returns true if the password is valid and that throws an exception if invalid. One that checks an ArrayList of passwords and returns an ArrayList with the status of any invalid passwords. The ArrayList of invalid passwords will be of the following format:

<password<space<message of exception thrown

Create exception classes for each exception listed in PasswordCheckerInterface.java.

Always check for the length of the password first, since that is the easiest and fastest check. Once the password fails one rule, you do not need to check the rest of the rules.

The GUI

Provide buttons to allow user to check validity of one password or a file of passwords.
Ask the user to enter the password and to re-type the password. If the two are not the same, inform the user.
Create a tool tip and a mnemonic for each of the buttons.
Use a FileChooser for the user to select the input file.
Use methods of PasswordChecker to process the passwords.
Use try/catch structure to catch exceptions thrown by PasswordChecker methods
Exceptions

Provide exception classes for the following:

Length of password is less than 8 characters (class LengthException)
Message – The password must be at least 8 characters long

Password doesn’t contain an uppercase alpha character (class NoUpperAlphaException)
Message – The password must contain at least one uppercase alphabetic character

Password doesn’t contain a lowercase alpha character (class NoLowerAlphaException)
Message – Error

Password doesn’t contain a numeric character (class NoDigitException)
Message – The password must contain at least one digit

Password contains more than 2 of the same character in sequence (class InvalidSequenceException)
Message – The password cannot contain more than two of the same character in sequence.

For GUI – check if Password and re-typed Password are identical (class UnmatchedExcpetion)
Message – The passwords do not match









The file will be in the following format:
One password per line






Examples:




Note: If you check for the uppercase before the lowercase – you will receive the uppercase exception


Displayed to user:






Note: If you check for the uppercase before the digit – you will receive the uppercase exception


Displayed to user:






3.



Displayed to user:






4.



Displayed to user:






5.



Displayed to user:






6. Based on the file above:




Displayed to user when selects Check Passwords in File









Assignment 1 Grade Sheet – Spring 2016




Name ____________________________




DOCUMENTATION 20 points
CheckList for Assignment 1 is included and completed 1 pt _____
Class documentation - Javadoc for all user created classes 3 pt _____
Class Description, @author

Method description, @param, @return

Test Cases 8 pt _____

JUnit Test Class

Implement STUDENT test in

PasswordCheckerTest given you

UML Diagram 3 pt _____

Lessons Learned 5 pt _____

In 3+ paragraphs, highlight your lessons learned and learning experience from working on this project. How did you do? What have you learned? What did you struggle with? How will you approach your next project differently?

PROGRAMMING 80 points
Internal class documentation (within source code) 16 pts _____

Class description using Javadoc

Author’s Name, Class, Class Time, @author

Methods commented using Javadoc, @param, @return

Additional comments as needed

Program user interface 6 pts _____

Clear to user how data is to be entered

Output is easy to understand

Accuracy

Received correct output

Public tests (given to you) 6 pt _____
Your test written for PassworkCheckerTest 6 pt _____
Private tests 10 pt _____
 

Program Detail

PasswordChecker class 12 pts _____

Method to check validity of password
Method to check validity of ArrayList of passwords
Implements PasswordCheckerInterface
GUI classes 12 pts _____

Uses methods of PasswordChecker
Displays status of password entered by user
Buttons have tooltips and mnemonics
Reads from a file and displays illegal passwords
Stores contents of file in ArrayList
check if user entered password and
Retyped are not the same

Exceptions classes 12 pts _____

Class for each invalid password rule
Class if password and re-type password don’t match



Total 100 pts _____