RockPaperScissors.java

package week4.rps;

import java.util.Scanner;

public class RockPaperScissors {

	private static final String TIE = "It was a tie";
	private static final String PLAYER_ONE_WINS = "Player One wins";
	private static final String PLAYER_TWO_WINS = "Player Two wins";

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);

		String playerOne;
		String playerTwo;
		String outcome = null;

		System.out.print("Player One, enter rock/paper/scissors: ");
		playerOne = scan.nextLine().toLowerCase();
		System.out.print("Player Two, enter rock/paper/scissors: ");
		playerTwo = scan.nextLine().toLowerCase();
		
		scan.close();

		// Tie
		if (playerOne.equals(playerTwo)) {
			outcome = TIE;
		}

		// Player One chooses rock
		if (playerOne.equals("rock")) {
			if (playerTwo.equals("paper")) {
				outcome = PLAYER_TWO_WINS;
			}
			if (playerTwo.equals("scissors")) {
				outcome = PLAYER_ONE_WINS;
			}
		}

		// Player One chooses paper
		if (playerOne.equals("paper")) {
			if (playerTwo.equals("rock")) {
				outcome = PLAYER_ONE_WINS;
			}
			if (playerTwo.equals("scissors")) {
				outcome = PLAYER_TWO_WINS;
			}
		}

		// Player One chooses scissors
		if (playerOne.equals("scissors")) {
			if (playerTwo.equals("rock")) {
				outcome = PLAYER_TWO_WINS;
			}
			if (playerTwo.equals("paper")) {
				outcome = PLAYER_ONE_WINS;
			}
		}
		
		// Print the outcome
		System.out.println(outcome);

	}

}