Assignment #5

Due: Thurs, June 26

Objective

This assignment will involve practice with characters and strings, using the libraries discussed in class (String, StringBuilder, Character)

Task

Write the following exercises, each in a separate file. Filenames should be:

Password.java
PigLatin.java

Exercise 1

Filename: Password.java

Many computer systems, web sites, etc. allow user accounts with passwords. When allowing users to choose passwords, many systems have requirements regarding the strength of the chosen password.

Write a program that allows a user to choose a password. The password is to be a single string of characters that contains no white space.

Your program needs to require that the chosen password meets the following criteria:
- The password must be at least 6 characters long
- The password must contain at least one lowercase letter
- The password must contain at least one uppercase letter
- The password must contain at least one digit
Whenever the user enters a password that fails to meet one or more of these criteria:
- Display a an error message informing the user of each criteria they have not met. (Note: There could be multiple ones).
- Make them re-enter a new password
Once the user enters a VALID password, ask them to enter it once more to verify their choice.
- If this entry matches the original chosen password, print a message saying that their password is now set
- If this entry does not match the chosen password, make them start the process over from the beginning

Sample Run

(user input is underlined, to distinguish it from output)

Enter your password: mommy1
Password needs to contain at least one uppercase letter

Enter your password: Mom2
Password needs to have 6 or more characters

Enter your password: dad
Password needs to have 6 or more characters
Password needs to contain at least one uppercase letter
Password needs to contain at least one digit

Enter your password: MYNAME4
Password needs to contain at least one lowercase letter

Enter your password: Friend8
Now re-enter your password for verification: Friend
Password does not match.  Start over

Enter your password: ClamChowder66
Now re-enter your password for verification: ClamChowder66

You have now entered a valid password

Exercise 2

Filename: PigLatin.java

Write a method, called toPigLatin, which is described below:

Here is a starter file, which contains a main test program. You should write your method in this file, but do not change the main() method in any way.

The method signature will be:

  public static String toPigLatin(String word)

You are to define this method so that it returns a String object that is the "Pig Latin" translation of the original incoming string (word)
For our purposes, we will use the following as the rules for translation of a word into "Pig Latin":
1. A word is a consecutive sequence of letters (a-z, A-Z) or apostrophes. You may assume that the input to the function will only be a single "word". Examples: Zebra , doesn't , apple
2. If a word starts with a vowel, the Pig Latin version is the original word with "way" added to the end
3. If a word starts with a consonant, or a series of consecutive consonants, the Pig Latin version transfers all consonants up to the first vowel to the end of the word, and adds "ay" to the end.
4. The letter 'y' should be treated as a consonant if it is the first letter of a word, but treated as a vowel otherwise.
5. If the original word is capitalized, the new Pig Latin version of the word should be capitalized in the first letter (i.e. the previous capital letter may not be capitalized any more).
The main() method in the starter file will help you test. The program prompts the user to type in 5 words, then calls the function for each of them and prints the converted version of each of the 5 strings. Note that the main() function does all of the output -- your toPigLatin function should do NO output (just the appropriate conversion and return). The output from your test runs should match mine exactly.

Sample Runs

(user input is underlined, to distinguish it from output)

Sample Run 1

Input 5 words: Flower yellow bypass apple Igloo

Pig Latin version of the 5 words:
Owerflay ellowyay ypassbay appleway Iglooway

Sample Run 2

Input 5 words: string Hamburger Rhythm queen zippitydoodah

Pig Latin version of the 5 words:
ingstray Amburgerhay Ythmrhay ueenqay ippitydoodahzay

Requirements for both programs

Your code should be readable and well-documented
You may use any of the libraries discussed in class for dealing with strings and characters. Suggestions (each of these is in java.lang):
- String
- StringBuilder
- Character

Submitting:

Submit the files through the Assignment 5 Blackboard link. Make sure you attach BOTH files before you click Submit:

  Password.java
  PigLatin.java