In the game Rock Paper Scissors, two players simultaneously choose one of three

Question

In the game Rock Paper Scissors, two players simultaneously choose one of three options: rock, paper, or scissors. if both players choose the same option, then the result is a tie. However, if they choose differently, the winner is determined as follows: Rock beats scissors; Scissors beats paper; Paper beats rock. Create a game in which the computer randomly chooses rock, paper or scissors. Let the user enter a number 1, 2, or 3, each representing one of the three choices. Then, determine the winner. Save the application as RockPaperScissors.java

Explanation / Answer

Program Plan: The program RockPaperScissor.java, User become one player and the System or program itself become the other playeHence r by generating the random option in rock,paper and scissor.

Program:

//importing the packges
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.Scanner;
import java.util.Random;

/* Name of the class has to be "Main" only if the class is public. */
public class RockPaperScissors {
public static void main(String[] args) throws java.lang.Exception {
  Scanner s = new Scanner(System.in);
  Random rn = new Random();
  int input;
  int n = 1;
  System.out.println("Hi lets play the Game");

  System.out.println("Pick 1,2, or 3 for:");
  System.out.println("1-ROCK ,2-PAPER, or 3-SCISSOR (3)");
  while (n != 0) {
   int r = 1, p = 2, sc = 3; //r for Rock,p for paper,scc for scissors

   input = s.nextInt(); //reading the user input
   int rand = rn.nextInt(3) + 1; //generating the random number.method returns 0 or1 or 2.thats why we are adding  //comparing the system option with the user option by using if..else structure   

if (rand == Rock) {
    if (input == r) {
     System.out.println("Rock Vs. Rock :: TIE");
    } else if (input == p) {
     System.out.println("Paper Vs. Rock: YOU WIN");
    } else if (input == sc) {
     System.out.println("Scissor Vs. Rock: YOU LOSE");
    }
   } else if (rand == Paper) {
    if (input == r) {
     System.out.println("Rock Vs. Paper: YOU LOSE");
    } else if (input == p) {
     System.out.println("Paper Vs. Paper: TIE");
    } else if (input == sc) {
     System.out.println("Scissor Vs. Paper: YOU WIN");
    }

   } else if (rand == sc) {
    if (input == r) {
     System.out.println("Rock Vs. Scissor: YOU WIN");
    } else if (input == p) {
     System.out.println("Paper Vs. Scissor: YOU LOSE");
    } else if (input == sc) {
     System.out.println("Scissor Vs. Scissor: TIE");
    }
   }

//Asking the user to play again

    char ch;
System.out.println("Do you want to play again? Y/N");
    ch= s.next();
    if(ch=='Y' ||ch='y'){
      n=1;
      System.out.println("Rock, Paper,SCISSOR");
    }
    else if(ch=='N' || ch=='n')
    {System.exit(0);
    System.out.println("GOODBYE");
  }

}
}
}

Sample output:

C:/> javac RockPaperScissor.java

C:/>java RockPaperScissor

Hi lets play the Game

Pick 1,2 or 3 for:

1-ROCK ,2-PAPER, or 3-SCISSOR

1

Rock Vs.Rock::TIE

Do you want to play again?Y/N

n

GOODBYE

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