Question

In a Java program, how could I write a program that can assign values that would make a rock paper scissors game work? I have a program that will generate a computer response of either rock, paper, or scissors but how can I compare a user input of "rock", "paper", or "scissors" so that we can declare either the user or the computer the winner.

Answer 1

import java.util.Random;
import java.util.Scanner;
public class RockPaperScissor {
    public static void main(String[] args) { 
        Scanner sc = new Scanner(System.in);   // Initialising Scanner object
        Random rand = new Random();            // Initialising Random object
        int comGenerated = 1 + rand.nextInt(3);  //Initialising comGeneratedn ,
        //1: Rock, 2: paper, 3: Scissors
        System.out.print("Pick yours\n1 for 'rock', 2 for 'paper', 3 for 'scissors':\nEnter Your Input : ");
        int userInput = sc.nextInt();            // Taking input userInput
        String userInputText;
        //converting user input number to string
        switch (userInput) {
            case 1:  userInputText = "rock";
                     break;
            case 2:  userInputText = "paper";
                     break;
            default: userInputText = "scissor";
                     break;
        }
        while(userInput != 1 && userInput != 2 && userInput != 3){   //checking for wrong user input
            System.out.println("WRONG user input, try again");
            userInput = sc.nextInt();
        }
        if(comGenerated == userInput){  //Checking for who won the match
           System.out.println("Computer:"+userInputText+" & You: "+userInputText+"\nGame Ties");
        }else if(comGenerated == 1 && userInput==2){
            System.out.println("Computer: rock & You: paper\nYou WON");
        }else if(comGenerated == 1 && userInput==3){
            System.out.println("Computer: rock & You: scissor\nComputer WON");
        }else if(comGenerated == 2 && userInput==1){
            System.out.println("Computer: paper & You: rock\nComputer WON");
        }else if(comGenerated == 2 && userInput==3){
            System.out.println("Computer: paper & You: scissor\nYou WON");
        }else if(comGenerated == 3 && userInput==1){
            System.out.println("Computer: scissor & You: rock\nYou WON");
        }else if(comGenerated == 3 && userInput==2){
            System.out.println("Computer: scissor & You: paper\nComputer WON");
        }
        System.out.println("Game finished! Want to play again?\n[Y] Play again [Any other key] Exit ");  
        char playAgain = sc.next().charAt(0);
        if(playAgain == 'Y' || playAgain == 'y')
            main(args);
    }
}

Program Snapshot

SAMPLE OUTPUT

ANOTHER SAMPLE OUTPUT