//通过套用switch-case实现判断

import java.util.Scanner;

/**
 * switch实现石头/剪子/布并判断胜负
 */
public class Main {

	@SuppressWarnings("preview")

	public static void main(String[] args) {
		
		System.out.println("please choice:");
		System.out.println(" 1: Rock");
		System.out.println(" 2: Scissors");
		System.out.println(" 3: Paper");
		// 用户输入 1, 2, 3:
		Scanner in = new Scanner(System.in);
		System.out.print("Please input your choice:");
		int choice = in.nextInt();
		// 计算机随机数 1, 2, 3:
		int random = (int) (1+Math.random() * 3);
		System.out.println("Your rival:" + random);
		// 判断与输出
		switch (choice) {
		case 1 -> {
			switch (random) {
			case 1 -> System.out.println("Result:Draw");
			case 2 -> System.out.println("Result:Win");
			case 3 -> System.out.println("Result:Lose");
			default -> System.out.println("Error");
			}
		}
		case 2 -> {
			switch (random) {
			case 1 -> System.out.println("Result:Lose");
			case 2 -> System.out.println("Result:Draw");
			case 3 -> System.out.println("Result:win");
			default -> System.out.println("Error");
			}
		}
		case 3 -> {
			switch (random) {
			case 1 -> System.out.println("Result:Win");
			case 2 -> System.out.println("Result:Lose");
			case 3 -> System.out.println("Result:Draw");
			default -> System.out.println("Error");
			}
		}
		default -> System.out.println("Error");
		}
	}

}