public class Main {    public static void main(String[] args) {        Scanner scnaner=new Scanner(System.in);        System.out.println("石头请输入:1，剪刀请输入:2，布请输入:3");        int choice = scnaner.nextInt();        int random = 1+(int)(Math.random()*3);        switch (choice-random){            case 0 -> System.out.printf("你输入%s,电脑输入%s,平局\n",choice,random);            case 1 -> System.out.printf("你输入%s,电脑输入%s,你输了\n",choice,random);            case 2 -> System.out.printf("你输入%s,电脑输入%s,你赢了\n",choice,random);            case -1 -> System.out.printf("你输入%s,电脑输入%s,你赢了\n",choice,random);            case -2-> System.out.printf("你输入%s,电脑输入%s,你输了\n",choice,random);            default -> System.out.println("输入有误请重新输入");        }    }}