Question

Hello, I have this programing assignment that I have to do and I am having issues on how to solve it. The program has to be on Java.

-thank you in advance.

1- The game Paper, Rock, Scissors is played between two people. Each person counts "one, two, three" and on three displays their hands as either flat - Paper, a fist - Rock or two spread fingers - Scissors. The winner is determined by these rules:

Paper covers Rock (Paper wins) Rock smashes Scissors (Rock wins) or Scissors cuts paper (Scissors wins). In the event of players choosing the same item, the game must be replayed until there is a winner.

Recreate the classic game with the user entering their choice and the computer choice generated randomly. Record who wins or if it is a tie replay the game.  Output the results. Try to use several methods to do the actual work. Treat main method like a traffic cop that directs the flow but does not do the computations or output.

Answer 1

Thanks for the question.


Here is the completed code for this problem.

 Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. 

If you are satisfied with the solution, please rate the answer. 

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

public class RPSGame {

    public static void main(String[] args) {

        // welcome message
        System.out.println("Welcome to the classic game of Rock, Scissors and Paper");
        // method that will get a valid response from user and returns back
        String userChoice = getUserChoice();
        // method that returns a random choice imitaiting the other player and returns
        String computerChoice = getComputerChoice();
        // prints the result of the two choices
        displayResult(userChoice, computerChoice);


    }

    private static void displayResult(String userChoice, String computerChoice) {

        System.out.println("You choose: " + userChoice.toUpperCase() + " Computer choose: " + computerChoice.toUpperCase());
        if (userChoice.equalsIgnoreCase(computerChoice)) {
            System.out.println("Its a Tie!");
        } else if (userChoice.equalsIgnoreCase("Paper") && computerChoice.equalsIgnoreCase("Rock")) {
            System.out.println("Congratulations. You win!");
        } else if (userChoice.equalsIgnoreCase("Rock") && computerChoice.equalsIgnoreCase("Scissors")) {
            System.out.println("Congratulations. You win!");
        } else if (userChoice.equalsIgnoreCase("Scissors") && computerChoice.equalsIgnoreCase("Paper")) {
            System.out.println("Congratulations. You win!");
        } else {
            System.out.println("Sorry, Computer wins!");
        }
    }

    private static String getComputerChoice() {
        Random random = new Random();
        int randomNumber = random.nextInt(3) + 1;
        if (randomNumber == 1) return "Rock";
        else if (randomNumber == 2) return "Paper";
        else return "Scissors";
    }

    private static String getUserChoice() {

        Scanner scanner = new Scanner(System.in);
        String choice = "";
        while (true) {

            System.out.println("Enter your choice (Rock, Paper or Scissors): ");
            choice = scanner.nextLine();
            if (choice.equalsIgnoreCase("Rock") || choice.equalsIgnoreCase("Paper") ||
                    choice.equalsIgnoreCase("Scissors")) {
                break;

            } else {
                System.out.println("Sorry, Invalid selection. Please choose either Rock, Scissors or Paper only.");
            }
        }
        return choice.toUpperCase();
    }
}

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