Basic One-Player Rock, Paper, Scissors in Java

RockPaperScissors.java

import java.util.Scanner;
import java.util.Arrays;

public class RockPaperScissors
{
    public static void RockPaperScissors()
    {
        String[] possibleChoices = {"rock", "paper", "scissors"};
        Scanner userInput = new Scanner(System.in); // create a Scanner for getting user input
        String playerChoice = ""; // declare an empty variable that we'll fill with the user input
        while (!Arrays.asList(possibleChoices).contains(playerChoice)) { // keep asking if user input is not correct
            System.out.print("Type rock, paper, or scissors: ");
            playerChoice = userInput.nextLine();
        }
        // we now have a playerChoice that is from possibleChoices
        System.out.print("You selected ");
        System.out.println(playerChoice);
        // the computer choses a random value from possibleChoices
        int randomChoice = (int)(Math.random()*3);
        String computerChoice = possibleChoices[randomChoice];
        System.out.print("The computer selected ");
        System.out.println(computerChoice);
        // check who wins, default to the computer winning
        String winner = "The computer wins.";
        if (playerChoice.equals(computerChoice)) {
            winner = "It is a tie.";
        } else {
            if (playerChoice.equals("rock") && computerChoice.equals("scissors")) {
                winner = "You win.";
            } else if (playerChoice.equals("paper") && computerChoice.equals("rock")) {
                winner = "You win.";
            } else if (playerChoice.equals("scissors") && computerChoice.equals("paper")) {
                winner = "You win.";
            }
        }
        System.out.println(winner);
    }
}