用java编写猜拳游戏

以下是使用Java编写的猜拳游戏示例代码：

import java.util.Scanner;

public class RockPaperScissors {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String[] choices = {"rock", "paper", "scissors"};
        int computerChoice = (int) (Math.random() * 3);
        System.out.print("Enter your choice (rock, paper, or scissors): ");
        String userChoice = input.nextLine().toLowerCase();
        System.out.println("Computer chose " + choices[computerChoice]);

        if (userChoice.equals(choices[computerChoice])) {
            System.out.println("It's a tie!");
        } else if ((userChoice.equals("rock") && choices[computerChoice].equals("scissors")) ||
                (userChoice.equals("paper") && choices[computerChoice].equals("rock")) ||
                (userChoice.equals("scissors") && choices[computerChoice].equals("paper"))) {
            System.out.println("You win!");
        } else {
            System.out.println("Computer wins!");
        }
    }
}

该程序首先生成计算机的随机选择（rock、paper或scissors），然后提示用户输入他们的选择。程序将用户选择与计算机选择进行比较并输出结果。如果用户选择与计算机选择相同，则宣布平局。如果用户选择胜利，则宣布用户获胜。否则，宣布计算机获胜。