写一段石头剪刀布的Java代码

好的，这是一段简单的石头剪刀布Java代码：

import java.util.Scanner;

public class RPS {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    System.out.println("请出拳(1. 石头 2. 剪刀 3. 布):");
    int playerGesture = sc.nextInt();

    int computerGesture = (int) (Math.random() * 3 + 1);
    System.out.println("电脑出了: " + computerGesture);

    if (playerGesture == computerGesture) {
      System.out.println("平局");
    } else if ((playerGesture == 1 && computerGesture == 2) ||
               (playerGesture == 2 && computerGesture == 3) ||
               (playerGesture == 3 && computerGesture == 1)) {
      System.out.println("你赢了");
    } else {
      System.out.println("你输了");
    }
  }
}

代码的思路很简单：读入玩家出的拳，用随机数模拟电脑出的拳，再根据规则判断并输出结果。