如何为用户输入（单词）分配要在代码中使用的整数值

问：

我正在尝试创建一个“石头剪刀布蜥蜴斯波克”游戏，并希望用户能够输入分配给变量的整数，并且还能够输入单词或。你能帮我包含一部分代码，我可以将字符串输入分配给整数吗？我也不想改变代码的主框架。我也知道网站说不要粘贴整个文件，但我想不出另一种方法来显示我的问题。请注意，我一直在使用一个名为SoloLearn的网站。任何帮助将不胜感激。(Rock=0, Paper=1, Scissors=2, Lizard=3 and Spock=4)"Rock", "Paper", "Scissors", "Lizard""Spock"

import java.util.Scanner;

public class RockPaperScissorsLizardSpock {

    final static int ROCK = 0;
    final static int PAPER = 1;
    final static int SCISSORS = 2;
    final static int LIZARD = 3;
    final static int SPOCK = 4;


    public static void main(String[] args) {

        double r = Math.random();
        int computerChoice = (int)(3.0 * r);

        Scanner input = new Scanner(System.in);
        System.out.print("Enter 0 for Rock, 1 for Paper, 2 for Scissors, 3 for Lizard, 4 for Spock: ");
        int playerChoice = input.nextInt();
    System.out.println(computerChoice);

    int playerChoice = 0;

    switch (playerChoice) {

        case "Rock":
            playerChoice = 0;
            break;
        case "Paper":
            playerChoice = 1;
            break;
        case "Scissors":
            playerChoice = 2;
        case "Lizard":
            playerChoice = 3;
        case "Spock":
            playerChoice = 4;

    if (computerChoice == playerChoice) {
            System.out.println("Tie");
        }
        else if (computerChoice == ROCK && playerChoice == SCISSORS) {
            System.out.println("I chose Rock,You chose Scissors, Rock crushes Scissors, You lose.");
        }
        else if (computerChoice == SCISSORS && playerChoice == PAPER) {
            System.out.println("I chose Scissors, You chose Paper, Scissors cut Paper, You lose.");
        }
        else if (computerChoice == PAPER && playerChoice == ROCK) {
            System.out.println("I chose Paper,You chose Rock, Paper covers Rock, You lose.");
        }
         else if (computerChoice == LIZARD && playerChoice == PAPER) {
            System.out.println("I chose Lizard, You chose Paper, Lizard eats Paper, You lose.");
        }
        else if (computerChoice == SPOCK && playerChoice == SCISSORS) {
            System.out.println("I chose Spock, You chose Scissors, Spock smashes Scissors, You lose.");
        }
        else if (computerChoice == ROCK && playerChoice == LIZARD) {
            System.out.println("I chose Rock, You chose Lizard, Rock crushes Lizard, You lose.");
        }
        else if (computerChoice == SCISSORS && playerChoice == LIZARD) {
            System.out.println("I chose Scissors, You chose Lizard, Scissors decapitates Lizard, You lose.");
        }
        else if (computerChoice == SPOCK && playerChoice == PAPER) {
            System.out.println("I chose Spock, You chose Paper, Paper disproves Spock, You lose.");
        }
        else if (computerChoice == SPOCK && playerChoice == ROCK) {
            System.out.println("I chose Spock, You chose Rock, Spock vaporizes Rock, You lose.");
        }
        else if (computerChoice == SCISSORS && playerChoice == ROCK) {
            System.out.println("I chose Scissors, You chose Rock, Rock crushes Scissors, You win.");
        }
        else if (computerChoice == PAPER && playerChoice == SCISSORS) {
            System.out.println("I chose Paper, You chose Scissors, Scissors cut Paper, You win.");
        }
        else if (computerChoice == ROCK && playerChoice == PAPER) {
            System.out.println("I chose Rock, You chose Paper, Paper covers Rock,You win.");
        }
        else if (computerChoice == PAPER && playerChoice == LIZARD) {
            System.out.println("I chose Paper, You chose Lizard, Lizard eats Paper, You win.");
        }
        else if (computerChoice == SCISSORS && playerChoice == SPOCK) {
            System.out.println("I chose Scissors, You chose Spock, Spock smashes Scissors, You win.");
        }
         else if (computerChoice == LIZARD && playerChoice == ROCK) {
            System.out.println("I chose Lizard, You chose Rock, Rock crushes Lizard, You win.");
        }
        else if (computerChoice == LIZARD && playerChoice == SCISSORS) {
            System.out.println("I chose Lizard, You chose Scissors, Scissors decapitates Lizard,  win.");
        }
        else if (computerChoice == PAPER && playerChoice == SPOCK) {
            System.out.println("I chose Paper, You chose Spock, Paper disproves Spock, You win.");
        }
        else if (computerChoice == ROCK && playerChoice == SPOCK) {
            System.out.println("I chose Rock, You chose Spock, Spock vaporizes Rock, You win.");
        }else{
            System.out.println("Error");
        }
    }
  }
}