Question

For this week’s assignment, we will be recreating the Rock, Paper, Scissors program using Object-Oriented Programming. You will be working with me on a team to build the program. I have already written my part of the program, and the Game.java file is attached. Your task will be to write a RockPaperScissors class that contains the following methods: getUserChoice: Has the user choose Rock, Paper, or Scissors. After validating the input, the method returns a String containing the user choice. getCPUChoice: Randomly selects Rock, Paper, or Scissors for the computer, and returns a String containing the computer choice. pickWinner: Is passed two Strings containing the user choice and the computer choice. Compares the two choices and selects a winner. Returns a String containing “User”, “Computer”, or “Tie” to indicate the winner. Your class should interact with my class to make the game function correctly. Sample session: Welcome to Rock, Paper, Scissors! How many rounds would you like to play?: 2 Sorry, you need to enter an odd number. Please try again: 3 Rock, Paper, or Scissors?: Monkey Sorry, “Monkey” is not a valid entry. Rock, Paper, or Scissors?: Rock Computer chooses Paper. Computer wins! Rock, Paper, or Scissors?: Rock Computer chooses Rock. It’s a tie. Play again. Rock, Paper, or Scissors?: Paper Computer chooses Rock. User wins! Rock, Paper or Scissors?: Rock Computer chooses Scissors. User wins! User wins: 2 Computer wins: 1 The user won! 

Answer 1

RockPaperScissors.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class RockPaperScissors {
   private String userChoice;
   private String[] cpuChoice = { "Rock", "Paper", "Scissor" };//cpu choice

   public String getUserChoice() throws IOException {
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       boolean valid = true;

       while (valid) {//getting valid user input
           System.out.print("Rock, Paper or Scissor? ");
           userChoice = br.readLine();
           if (userChoice.equalsIgnoreCase("Paper")) {
               valid = false;
           } else if (userChoice.equalsIgnoreCase("Rock")) {
               valid = false;
           } else if (userChoice.equalsIgnoreCase("Scissor")) {
               valid = false;
           } else {
               System.out.println("Sorry " + userChoice + " is not a valid entry");
           }
       }
       return userChoice;
   }

   public String getCpuChoice() {//getting random cpu input
       int ran = (int) (Math.random() * 3);
       System.out.println("Computer chooses " + cpuChoice[ran]);
       return cpuChoice[ran];
   }

   public String pickWinner(int userChoice, int computerChoice) {
       if (userChoice == computerChoice) // tie cases
       {
           return "Tie";
       } else if (userChoice == 1 && computerChoice == 3) // user wins rock vs scissors
       {
           return "User";
       } else if (userChoice == 3 && computerChoice == 2) // user wins scissors vs paper
       {
           return "User";
       } else if (userChoice == 2 && computerChoice == 1) // user wins paper vs rock
       {
           return "User";
       } else // otherwise computer wins
       {
           return "CPU";
       }
   }
}

public class RockPaperSissorsDemo {
   public static void main(String[] args) throws IOException {
       // for taking console input
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       RockPaperScissors obj = new RockPaperScissors();
       int cpu = 0, user = 0, tie = 0, round = 0;
       boolean valid = true;
       while (valid) {//getting odd number of rounds
           System.out.print("How many rounds would you like to play? ");
           round = Integer.parseInt(br.readLine());
           if (round % 2 == 0) {
               System.out.println("Sorry, you need to enter an odd number");
           } else {
               valid = false;
           }
       }
       for (int i = 1; i <= round; i++) {//running till given rounds
           String userChoice = obj.getUserChoice();
           String cpuChoice = obj.getCpuChoice();
           int userNum = getChoiceNum(userChoice);
           int cpuNum = getChoiceNum(cpuChoice);
           String winner = obj.pickWinner(userNum, cpuNum);
           if(winner.equalsIgnoreCase("user")) {
               System.out.println("You Win!");
               user++;
           }
           else if(winner.equalsIgnoreCase("cpu")){
               System.out.println("Computer Wins!");
               cpu++;
           }
           else {
               System.out.println("Its a Tie!");
               tie++;
           }
       }
       //showing statistics
       System.out.println("*****************Game Statistics*****************");
       System.out.println("Player Won: "+user);
       System.out.println("Computer Won: "+cpu);
       System.out.println("Tie: "+tie);
       if(user>cpu) {
           System.out.println("You're the Winner");
       }
       else if(user            System.out.println("Computer is the Winner");
       }
       else {
           System.out.println("The game was a Tie");
       }
   }

   private static int getChoiceNum(String choice) {//converting rock, paper, scissor to numbers
       if (choice.equalsIgnoreCase("rock")) {
           return 1;
       } else if (choice.equalsIgnoreCase("paper")) {
           return 2;
       } else {
           return 3;
       }
   }
}

Program Screenshots

RockPaperSissorsDemo.java 1 import java.io. BufferedReader; 2 import java.io. IOException; 3import java.io. InputStreamReader; 5 class RockPaperScissors private String userChoice; 7 private String[] cpuChoice"Rock", "Paper", "Scissor";//cpu choice 9 public String getUserChoice) throws IOException 10 BufferedReader br new BufferedReader(new InputstreamReader (System.in)) boolean validtrue; 12 13 14 15 16 17 18 19 20 21 while (valid) //getting valid user input System.out.print("Rock, Paper or Scissor?"; userChoice - br.readLine ); İf (userChoice.equalsignoreCase("Paper")) { else if (userChoice.equalsIgnoreCase("Rock")) else if (userChoice.equalsIgnoreCase("Scissor")) i else ( valid- false validfalse validfalse System.out.println("Sorry"userChoice " is not a valid entry"); 23 24 25 return userChoice 27 28 29 public String getCpuChoice) (//getting random cpu input 30 31 32 int ran-(int) (Math.random) *3); System.out.println( "Computer chooses "cpuChoice[ran]); return cpuChoice[ran]; 34 35 public String pickwinner(int userChoice, int computerChoice) 36 37 38 39 40 İf (userChoice -computerchoice) // tie cases return "Tie" else if (userChoice 1 && computerChoice 3) // user wins rock vs scissors return "User"; 42 else if (userChoice3 && computerChoice2) / user wins scissors vs paper return "User"; else if (userChoice2 && computerChoice--1) // user wins paper vs rock 46 return "User"; else // otherwise computer wins 48 49 50 51 52 53 h S4 S5 public class RockPaperSissorsDemo 56 public static void main(String] args) throws IOException 57 58 59 60 61 62 return "CPU" // for taking console input BufferedReader brnew BufferedReader(new InputStreamReader (System.in)) RockPaperScissors obj new RockPaperScissors(); int cpu 0, user - 0, tie e, round - e; boolean validtrue while (valid) //getting odd number of rounds Page 1

Output

How many rounds would you like to play? 5 Rock, Paper or Scissor? scissor Computer chooses Paper You Win! Rock, Paper or Scissor? rock Computer chooses Rock Its a Tie! Rock, Paper or Scissor? paper Computer chooses Rock You Win! Rock, Paper or Scissor? scissor Computer chooses Scissor Its a Tie! Rock, Paper or Scissor? rock Computer chooses Paper Computer Wins! ****Game Statistics**** Player Won: 2 Computer Won: 1 Tie: 2 You're the Winner