public static void main(String args[]) {

System.out.print("请出拳【石头/剪刀/布】：");

Scanner scanner = new Scanner(System.in);

String aList[] = { "剪刀", "石头", "布" };

String userInput = scanner.nextLine();

String systemInput = aList[new Random().nextInt(3)];

int userInt = switch (userInput) {

case "石头" -> 0;

case "剪刀" -> 1;

case "布" -> 2;

default -> {yield 100;}

};

int systemInt = switch (systemInput) {

case "石头" -> 0;

case "剪刀" -> 1;

case "布" -> 2;

default -> {yield 100;}

};

int result = systemInt - userInt;

switch (result) {

case -98, -99, -100 -> System.out.println("请正确出拳！");

case -1, 2 -> System.out.printf("系统出:%s 你输了！", systemInput);

case 0 -> System.out.printf("系统也是出:%s 打平了！", systemInput);

default -> System.out.printf("系统出:%s 你赢了！", systemInput);

}

}