Homework : BlackJack (Extra Credit)

Due: 2024-10-28 23:59:00EDT

In this project you will be implementing BlackJack based on the description below.

Requirements:

• Use printf. You are not allowed to use any other method for printing output
• Every method should be properly documented using the java doc notation.
• Every java file should have a header. However, DO NOT PUT YOUR NAME IN YOUR HEADERS. On gradescope we grade your assignments anonymously so including your name in your Java file will defeat that purpose. However, please include your name in your README.txt Note, in the examples, * indicates user input.

You are allowed to use the code we developed in class for Blackjack.

BlackJack

Write a program called BlackJack.java that will allow a user to play a simplified version of BlackJack. The rules of BlackJack are as follows:

• Each card has a value ranging from 1 to 11 (inclusive).
• The player starts with two cards.
• The house starts with two cards. The player is shown just one of the houses’s cards.
• Until the value of the player’s hand (i.e. the sum of the value of their cards) is greater than or equal to 21, the player has two options: “Hit” or “Stand”.
• If the player chooses “Hit”, they are given another card.
• If the value of the player’s hand is ever greater than 21, the player automatically looses.
• Once the player chooses “Stand”, their turn ends
• If the value of the dealer’s hand is less than 15, then give them another card chosen at random.
• If the value of the dealer’s hand is greater than or equal to the player’s hand, the dealer wins. Otherwise the player wins (assuming they did not go over 21).

Example 1

$ javac BlackJack.java; java BlackJack
One of the dealer's cards is 5
Your hand's value is 12. What would you like to do:
*HIT*
Your hand's new value is 22. 
You lost - goodbye!

Example 2

$ javac BlackJack.java; java BlackJack
One of the dealer's cards is 10
Your hand's value is 13. What would you like to do:
*HIT*
Your hand's new value is 20. What would you like to do:
*STAY*
The dealer's hand is 19.
You won - congrats! 

Example 3

$ javac BlackJack.java; java BlackJack
One of the dealer's cards is 11
Your hand's value is 22. 
You lost - goodbye!

Example 4

$ javac BlackJack.java; java BlackJack
One of the dealer's cards is 9
Your hand's value is 5. What would you like to do:
*HiT*
Your hand's new value is 7. What would you like to do:
*hiT*
Your hand's new value is 11. What would you like to do:
*hit*
Your hand's new value is 18. What would you like to do:
*stAy*
The dealer's hand is 12.
The dealer's hand is 15.
The dealer's hand is 21.
You lost - goodbye!

2. Requirements

Multiple rounds

Your program must allow a user to play multiple rounds of Blackjack. The program must keep track of how many times the user has won and lost.

Your program must take in the number of rounds a user wants to play via a command line argument.

$java BlackJack 10

The above bash command runs the program and indicates that the user wants to play 10 rounds of Blackjack. If no command line argument is passed in or if the command line argument is not an integer, then the program will run for just one round of BlackJack.

Case-insensitive

Your program must be case-insensitive. That means that if a user inputs “Hit”, or “hit”, or “HIT”, then you give them another card (the same goes for “Stay”).

Lok at Example 4 to see how the program must accept “stAy” or “hiT” or “HiT” as valid options.

Robust to bad user input

If a user inputs something besides for Stay or Hit, then re-prompt the user for a valid answer. The example below demonstrates how your program should work:

$ javac BlackJack.java; java BlackJack
One of the dealer's cards is 5
Your hand's value is 12. What would you like to do:
*SHtay*
SHtay is invalid.
Your hand's value is 12. What would you like to do:
*hit*
Your hand's new value is 22. 
You lost - goodbye!

3. Hints

• Math.random() generates a random value between 0 and 1. Use this to create the value of a random card. The value of a card ranges from 1 to 11 (inclusive).

README.txt

In a text file called README.txt answer the following questions:

1. How much time did you spend on the homework
2. What did you learn from this homework
3. optional: What did you struggle with during this homework
4. optional: any other feedback you would like to share

Dont forget: make sure to fill in the header in all of your java files.

Submitting

Submit the following files to the assignment called HW06 on Gradescope:

1. BlackJack.java
2. README.txt

Make sure to name these files exactly what we specify here. Otherwise, our autograders might not work and we might have to take points off.