Question

In JAVA

Chapter 5Assignment(Rock, Paper, Scissors)–20pointsYour goal is towrite a program that lets the user play the game of Rock, Paper, Scissors against the computer.Your program should have the following: •Make the name of the project RockPaperScissors•Write a method that generates a random number in the range of 1 through 3. The randomly generated number will determine if the computer chooses rock, paper, or scissors. 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.Return the computer’s choice.(5points)•Write another method where the user enters his or her choice of “rock”, “paper”, or “scissors”. You can usecommand line or message box. You can choose to have the user type the wordor use a menu choice. If the user does not enter a valid choose,prompt them for the choice again(You can do this inside of this method or create another method to do the validation).Return the user’s choice.(6points)•Write another method to determine the winnerand display the results. Write conditionals to determine the winner. •Ifone player chooses rock andthe other player choose scissors, then rock wins. (Rock smashes scissors).•If one player chooses scissors and the other player chooses paper, then scissors wins. (Scissors cut 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.Display the computer’s choice, the user’s choice, and whether or not the computer or the user won/tied. (5points)•In the main method, call the method that generates the computer’s choice and save this choice in a variable. Call the method to get the user’s choice and save in a variable. Callthemethod to determine the winnerand displayresults method(You will need to usea loop to repeat this method if the computer and the user choices were tied).(4points)

Answer 1

CODE:

package rockpaperscissors;

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

public class RockPaperScissors {
public static void main(String[] args) {
//c_choice - stores computer's choice
//u_choice - stores user's choice
int c_choice, u_choice;
//result - stores result (-1 computer wins), (1 user wins), (0 ties)
int result = 0;
//while result is 0(tie), loop runs
while(result == 0){
//getComputerChoice() - returns (1 or 2 or 3) and assigned to c_choice
c_choice = getComputerChoice();
//getUserChoice() - returns (1 or 2 or 3) and assigned to u_choice
u_choice = getUserChoice();
//checkResult() - prints result and return (-1 or 0 or 1)
result = checkResult(c_choice,u_choice);
}
  
}
  
//getComputerChoice() - returns 1 or 2 or 3 (for rock, paper, scissors respectively)
public static int getComputerChoice(){
return new Random().nextInt(3) + 1;
}
  
public static int getUserChoice(){
Scanner scan = new Scanner(System.in);
// if flag = 0 -> input is invalid
// if flag = 1 -> valid input and it is returned
int flag = 0, choice = 0;
// while input is invalid, loop runs
while(flag == 0){
System.out.print("Choose\n1.Rock\n2.Paper\n3.Scissors\nEnter your choice :");
choice = scan.nextInt();
if(choice > 0 & choice < 4)
// flag is set to 1, if input is valid
flag = 1;
else
System.out.println("Invalid Input!");
}
return choice;
}
  
// checkResult() - calculate result based on conditions
// based on result, prints the result
// returns result
public static int checkResult(int c_choice, int u_choice){
int result = 0;
// (-1 computer wins), (1 user wins), (0 ties)
//computer == user - ties
if(c_choice == u_choice)
result = 0;
//computer - rock, user - scissors
else if(c_choice == 1 && u_choice == 3)
result = -1;
//computer - rock, user - paper
else if(c_choice == 1 && u_choice == 2)
result = 1;
//computer - paper, user - rock
else if(c_choice == 2 && u_choice == 1)
result = -1;
//computer - paper, user - scissors
else if(c_choice == 2 && u_choice == 3)
result = 1;
//computer - scissors, user - rock
else if(c_choice == 3 && u_choice == 1)
result = 1;
//computer - scissors, user - paper
else if(c_choice == 3 && u_choice == 2)
result = -1;
  
//prints corresponding object name - getObject()
System.out.println("Computer : "+getObject(c_choice));
System.out.println("User : "+getObject(u_choice));
if(result == -1)
System.out.println("Computer Wins!");
else if(result == 1)
System.out.println("User Wins!");
else
System.out.println("Tied!");
return result;   
}
  
//Helper function//
// getObject() - reads a int and String based on int value
// if int value is 1 returns "Rock"
// if 2 returns "Paper"
// if 3 returns "Scissors"
public static String getObject(int choice){
String object = null;
switch(choice){
case 1:
object = "Rock";
break;
case 2:
object = "Paper";
break;
case 3:
object = "Scissors";
}
return object;
}
}

//Screenshot of Code:

//refer this to know the proper indentations.

package rockpaperscissors; import java.util.Random; import java.util.Scanner; public class RockPaperScissors { public static void main(String args) { //c_choice - stores computer's choice //u_choice - stores user's choice int c_choice, u_choice; //result - stores result (-1 computer wins), (1 user wins), o ties) int result = 0; while result is 0 (tie), loop runs while(result == 0){ //getComputerChoice-returns (1 or 2 or 3) and assigned to c_choice c_choice = getComputer Choice : //getUserChoice- returns (1 or 2 or 3) and assigned to u_choice u_choice = getUser Choice; //checkResult-prints result and return (-1 or 0 or 1) result = checkResult (c_choice,u_choice); //getComputerChoice - returns 1 or 2 or 3 (for rock, paper, scissors respectively) public static int getComputerChoiceO{ return new Random().nextInt(3) + 1; public static int getUserChoice 0{ Scanner scan = new Scanner(System.in); // if flag = 0 -> input is invalid // if flag = 1 -> valid input and it is returned int flag = 0, choice = 0; // while input is invalid, loop runs while(flag == 0) { System.out.print("Choose\n1.Rock\n2.Paper\n3.Scissors nEnter your choice :"); choice = scan.nextInt(); if(choice > 0 & choice < 4) // flag is set to 1, if input is valid flag = 1; else System.out.println("Invalid Input!"):

else System.out.println("Invalid Input!"); return choice; } // checkResult -calculate result based on conditions // based on result, prints the result // returns result public static int checkResult(int c_choice, int u_choice) { int result = 0; // (-1 computer wins), (1 user wins, o ties) computer == user-ties if(c_choice == u_choice) result = 0; computer - rock, user-scissors else if(c_choice == 1 && u_choice == 3) result = -1; /computer-rock, user - paper else if(c_choice == 1 && u_choice == 2) result = 1; computer - paper, user-rock else if(c_choice == 2 && u_choice == 1) result = -1; //computer - paper, user-scissors else if(c_choice == 2 && u_choice == 3) result = 1; computer - scissors, user-rock else if(c_choice == 3 && u_choice == 1) result = 1; //computer - scissors, user - paper else if(c_choice == 3 && u_choice == 2) result = -1; 1/prints corresponding object name - getObject System.out.println("Computer : "+getObject (c_choice)); System.out.println("User : "+getObject (u_choice)); if(result == -1) System.out.println("Computer Wins!"); else if(result == 1) System.out.println("User Wins!"); else System.out.println("Tied!"); return result;

System.out.println("Computer : "+getUbject (c_choice)); System.out.println("User : "+getObject (u_choice)); if(result == -1) System.out.println("Computer Wins!"); else if(result == 1) System.out.println("User Wins!"); else System.out.println("Tied!"): return result; //Helper function// // getObject( - reads a int and String based on int value // if int value is 1 returns "Rock" // if2 returns "Paper" // if 3 returns "Scissors" public static String getObject(int choice){ String object = null; switch(choice) { case 1: object = "Rock": break; case 2: object = "Paper"; break; case 3: object = "Scissors": return object;
//Sample I/O:

run: Choose 1. Rock 2.Paper 3. Scissors Enter your choice :1 Computer : Rock User : Rock Tied! Choose 1. Rock 2. Paper 3. Scissors Enter your choice :1 Computer : Scissors User : Rock User Wins! BUILD SUCCESSFUL (total time: 3 seconds)

run: Choose 1. Rock 2. Paper 3. Scissors Enter your choice :3 Computer : Scissors User : Scissors Tied! Choose 1. Rock 2. Paper 3. Scissors Enter your choice : 2 Computer : Paper User : Paper Tied! Choose 1. Rock 2. Paper 3. Scissors Enter your choice :1 Computer : Rock User : Rock Tied! Choose 1. Rock 2. Paper 3. Scissors Enter your choice :2 Computer : Scissors User : Paper Computer Wins! BUILD SUCCESSFUL (total time: 8 seconds)

run: Choose 1. Rock 2. Paper 3. Scissors Enter your choice : 2 Computer : Rock User : Paper User Wins! BUILD SUCCESSFUL (total time: 1 second)

//Hope this helps.

//Please give thumbs up. Thank you!

//Comment for doubts.