简单的java猜拳示例

import java.util.Scanner;
public class caiquan {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] r = {"石头", "剪刀", "布"};
        int computerChoice = (int) (Math.random() * 3); // 随机生成计算机出拳

        System.out.println("石头剪刀布游戏开始！");
        System.out.println("请出拳：0 - 石头，1 - 剪刀，2 - 布");
        int userChoice = scanner.nextInt();

        if (userChoice < 0 || userChoice > 2) {
            System.out.println("无效的输入，请输入0、1或2。");
            return;
        }

        System.out.println("你出了：" + r[userChoice]);
        System.out.println("我出了：" + r[computerChoice]);

        if (userChoice == computerChoice) {
            System.out.println("平局！");
        } else if (userChoice == 0 && computerChoice == 1
                || userChoice == 1 && computerChoice == 2
                || userChoice == 2 && computerChoice == 0) {
            System.out.println("你赢了！");
        } else {
            System.out.println("你输了！");
        }
    }
}