Question

IN JAVA. Write a program that lets the user play the game of Rock, Paper, Scissors against the computer. The program should work as follows.

When the program begins, a random number in the range of 1 through 3 is generated. If the number is 1, then the computer has chosen rock. If the number is 2, then the computer has chosen paper. If the number is 3, then the computer has chosen scissors. Don’t display the computer’s choice yet.

The user enters his or her choice of “rock”, “paper”, or “scissors” at the keyboard. 3. The computer’s choice is displayed.

A winner is selected according to the following rules: •

If one player chooses rock and the other player chooses scissors, then rock wins. The rock smashes the scissors.

• If one player chooses scissors and the other player chooses paper, then scissors wins. Scissors cuts paper.

• If one player chooses paper and the other player chooses rock, then paper wins. Paper wraps rock.

• If both players make the same choice, the game must be played again to determine the winner.

Be sure to divide the program into methods that perform each major task. Here is the description of the methods you should implement:

• public static String computerChoice() – This method will return the computer’s choice of “rock”, “paper”, or “scissors”. •

public static String userChoice () – This method will return the user’s choice of “rock”, “paper”, or “scissors” after validating the user’s choice using isValidChoice method.

• public static boolean isValidChoice (String choice) – This method will take a String holding the user’s choice as parameter and return true if the choice is valid (“rock”, “paper”, or “scissors”), false otherwise. Be sure that the comparison is not case sensitive. •

public static void determineWinner(string computer,string user)– This method will take both the choices as parameter and display the winner.

Call the method isValidChoice() in a while loop in the userChoice() method to verify that the choice that user enters must be “rock”, “paper”, or “scissors”. If invalid string is input, isValidChoice()will return false and the program should ask for new input until the valid input is given.

The user is allowed to play the game as often as desired .

Answer 1

CODE - Main.java

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

public class Main {
//function to determine Winner take user move and computersMove as arguements
   public static int determineWinner(int usersMove, int computersMove) {
//if usersMove and computersMove are equal than return 2 means draw
if (usersMove == computersMove)
return 2;
//check if user choose rock
else if (usersMove == 1)
{ //if computer choose scissor than return 1 user wins
   if (computersMove == 3)
   return 1;
//if computer choose paper than return 0 computer wins
   else if (computersMove == 2)
   return 0;
}
//check if user choose paper
else if (usersMove == 2) {
//if computer choose rock than return 1 user wins
if (computersMove==1)
return 1;
  
//if computer choose scissor than return 0 computer wins
   else if (computersMove == 3)
   return 0;
}
  
//check if user choose scissor
else if (usersMove == 3)
{ //if computer choose paper than return 1 user wins
   if (computersMove == 2)
   return 1;
   //if computer choose rock than return 0 computer wins
   else if (computersMove == 1)
   return 0;
}
return 5;
}
//function to get computer Choice
public static int computerChoice(){
//variable declare
       int computersNum;
       //random object
       Random random = new Random();
       //generate random number
       // 1 = rock, 2 = paper ,3 = scissors
       computersNum = random.nextInt(2)+1;
       //return computers choice
       return computersNum;
   }
   //ask user choice
   public static int userChoice(){
   Scanner scanner = new Scanner(System.in);
   //ask use to enter choice
   System.out.println("Enter 1 = rock, 2 = paper ,3 = scissors");
   //store in input
       int input = scanner.nextInt();
       //check user choice is valid or not
       while(!isValidChoice(input)){
       //Invalid choice ask again user to enter choice
       System.out.println("Invalid choice , Pleaser enter 1 = rock, 2 = paper ,3 = scissors");
       //store in input
   input = scanner.nextInt();
       }
return input;
}
//function to check choice is valid or not
public static boolean isValidChoice(int userChoice){
if(userChoice==1||userChoice==2||userChoice==3)
return true;
else
return false;
}
  
   public static void main(String[] args) {
   //get use move
       int userInput = userChoice();
       //get computer move
       int computersMove = computerChoice();
       //print user choice
       if(userInput == 1)
       System.out.print("Human : Rock " );
       else if(userInput == 2)
       System.out.print("Human : Paper " );
       else
       System.out.print("Human : Scissors ");
      
       //print computer choice
       if(computersMove == 1)
       System.out.print("Computer : Rock" );
       else if(computersMove == 2)
       System.out.print("Computer : Paper" );
       else
       System.out.print("Computer : Scissors");
       System.out.println();
       int win = determineWinner(userInput,computersMove);
       //print winner
       if(win == 1){
       System.out.println("Human wins this round");
       }
       else if (win == 0){
       System.out.println("Computer wins this round");
       }
       else if(win == 2){
       System.out.println("Its a draw");
       }
       System.out.println();
       }
   }

Screenshots -

pls do give alike ,thank you