用java编写，写一个剪刀、石头、布的小游戏 程序启动后会随机生成0-2的随机整数，分别代表剪刀、石头和布，玩家通过键盘输入剪刀、石头和布与电脑进行3轮游戏，赢的次数多的一方为赢家。若3局皆为平局，则最终结果判为平局。

在Java中创建这个小游戏，我们可以使用`Random`类生成随机数，以及`Scanner`类获取用户输入。以下是简单的步骤和部分代码示例：

import java.util.Random;
import java.util.Scanner;

public class RockPaperScissorsGame {
    enum Gesture { ROCK(0), PAPER(1), SCISSORS(2);
        private int value;

        Gesture(int value) {
            this.value = value;
        }

        public static Gesture getRandomGesture() {
            Random random = new Random();
            return values()[random.nextInt(values().length)];
        }

        public boolean beats(Gesture other) {
            // 石头胜剪刀，剪刀胜布，布胜石头
            return (this == ROCK && other != SCISSORS) ||
                   (this == SCISSORS && other != ROCK) ||
                   (this == PAPER && other != PAPER);
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int playerWins = 0, computerWins = 0, ties = 0;
        for (int round = 1; round <= 3; round++) {
            System.out.println("Round " + round + ":");
            Gesture playerChoice = Gestures.valueOf(scanner.nextLine().toUpperCase());
            Gesture computerChoice = Gesture.getRandomGesture();

            if (playerChoice.beats(computerChoice)) {
                System.out.println("You win with " + playerChoice.name());
                playerWins++;
            } else if (computerChoice.beats(playerChoice)) {
                System.out.println("Computer wins with " + computerChoice.name());
                computerWins++;
            } else {
                System.out.println("It's a tie!");
                ties++;
            }
        }

        if (playerWins > computerWins) {
            System.out.println("Player wins the game!");
        } else if (computerWins > playerWins) {
            System.out.println("Computer wins the game!");
        } else {
            System.out.println("It's a draw!");
        }

        scanner.close();
    }
}

在这个例子中，我们首先定义了一个枚举`Gesture`来表示三种手势，然后有一个`beats()`方法用于判断胜负。主函数中，我们循环三次让用户和计算机各自选择，并根据规则计算胜利次数。最后根据获胜次数判断输赢。