package ch07;

import java.io.IOException;
import java.util.Scanner;

public class throwsDemo {
    public static void test() throws NullPointerException, IOException {
        System.out.println("请输入一个数字（0，1）：");
        Scanner in = new Scanner(System.in);
        int flag = in.nextInt();
        if (flag == 1)
            throw new NullPointerException();
        else
            throw new IOException();
    }

    public static void main(String[] args) {
        try {
            test();
        } catch (NullPointerException e) {
            System.out.println("系统抛出了" + e.getClass() + "类型的异常");
        } catch (IOException e) {
            System.out.println("系统抛出了" + e.getClass() + "类型的异常");
        }
    }
}