rockpaper.java

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

public class rockpaper {
    public static void main(String[] args) {
        // Rock Paper Scissors Game

        Scanner scanner = new Scanner(System.in);
        Random random = new Random();

        String[] choices = {"rock", "paper", "scissors"};
        String playerChoice;
        String computerChoice;
        String playAgain = "yes";
        do {
            System.out.print("Enter your move (rock, paper, scissors): ");
            playerChoice = scanner.nextLine().toLowerCase();
            
            if(!playerChoice.equals("rock") && 
            !playerChoice.equals("paper") && 
            !playerChoice.equals("scissors")) {
                System.out.println("Please enter a valid choice!");
                continue;
            }

            computerChoice = choices[random.nextInt(0, 3)];

            System.out.println("Computer choice: " + computerChoice);

            if(playerChoice.equals(computerChoice)) {
                System.out.println("It's a tie!");
            } else if ((playerChoice.equals("rock") && computerChoice.equals("scissors")) || 
                    (playerChoice.equals("paper") && computerChoice.equals("rock")) || 
                    (playerChoice.equals("scissors") && computerChoice.equals("paper"))) {
                System.out.println("You win!");
            } else {
                System.out.println("You lose!");
            }

            System.out.print("Play Again? (yes/no): ");
            playAgain = scanner.nextLine().toLowerCase();
        } while (playAgain.equals("yes"));

        System.out.println("Goodbye!");
        
        scanner.close();    
    }
}