Question

Objective: Write a program that simulates a game of rock, paper, scissors between a human and the computer in best 2 out of 3 rounds. Requirements: . The player can enter either "rock", "paper", or "scissors'". o If the player enters anything other than that the computer automatically gets a point . The computer randomly selects one of the gestures o Use the Random type to make this easier o Also make sure you import java.util.Random o You can use randomly selected integers to represent the gestures For each combination either the computer scores a point, the player scores a point, or they score neither on draws. o Rock vs Paper Paper wins o Paper vs Scissors-Scissors wins o Scissors vs Rock Rock wins After 3 rounds the winner or a tie is declared . The player is then asked whether or not they want to play again, and if they do the whole process starts over

Answer 1

//RockPaperScissors.java

import java.util.Random;

import java.util.Scanner;

public class RockPaperScissors {

private static boolean playAgain(Scanner scanner) {

System.out.println("Play again? Y(8), N(9)?");

switch (scanner.nextInt()) {

case 8:

System.out.println("Rock, Paper, Scissors!");

return true;

default:

System.out.println("Thanks for playing!");

return false;

}

}

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

RPSPlayer computer = new RandomComputerPlayer(new Random());

RPSPlayer human = new HumanPlayer(scanner);

// Count the number of wins

int winCount = 0;

System.out.println("Rock Paper Scissors");

do {

for (int i = 1; i <= 3; i++) {

String comp = computer.play();

String you = human.play();

System.out.printf("%s vs. %s\n", comp, you);

if (you.equals(comp)) {

System.out.println(", IT'S A TIE!");

} else if (("Rock".equals(you) && "Scissors".equals(comp))

|| ("Scissors".equals(you) && "Paper".equals(comp))

|| ("Paper".equals(you) && "Rock".equals(comp))) {

winCount++;

}

}

if (winCount >= 2)

System.out.println("! You win!");

else

System.out.println("! You lose!");

} while (playAgain(scanner));

}

}

//RPSPlayer.java

public interface RPSPlayer {

String[] CHOICES = new String[] { "Rock", "Paper", "Scissors" };

/**

* Returns one of "Rock", "Paper", or "Scissors".

*/

String play();

}

//HumanPlayer.java

import java.util.Scanner;

public class HumanPlayer implements RPSPlayer {

private final Scanner scanner;

public HumanPlayer(Scanner scanner) {

this.scanner = scanner;

}

public String play() {

System.out.println("Select 1, 2, or 3 for Rock, Paper, Scissors");

int choice = this.scanner.nextInt();

// Keeping things simple, not doing any validation here

return CHOICES[choice - 1];

}

}

//RandomComputer.java

import java.util.Random;

public class RandomComputerPlayer implements RPSPlayer {

private final Random random;

public RandomComputerPlayer(Random random) {

this.random = random;

}

public String play() {

return CHOICES[this.random.nextInt(CHOICES.length)];

}

}

Output: