随堂小笔记

package edu.xcdq;

/**
 * @author yuhuicun
 * @date 2021/4/27 14:49
 */
public class Demo01 {

    public static void main(String[] args) {
        int divisor = 10;
        int dividend = 0;
        //System.out.println(divisor/dividend);//ArithmeticException   算数异常
        try{
            System.out.println(divisor/dividend);//ArithmeticException   算数异常
        }catch (Exception e){
            e.printStackTrace();
            System.out.println("捕获一个异常");
        }
        System.out.println("哈哈哈哈");
    }
}

Demo01

package edu.xcdq;

import java.util.Scanner;

/**
 * @author yuhuicun
 * @date 2021/4/27 15:07
 */
public class Demo02 {
    public static void main(String[] args) {

        int [] a = new int[2];
        Scanner scanner = new Scanner(System.in);
        int i = scanner.nextInt();
        int j = scanner.nextInt();
        try{
            a[0] = i;
            a[2] = j;
            System.out.println(a[0]/a[2]);
        }catch (IndexOutOfBoundsException e){
            System.out.println("数组越界异常");
        }catch (NumberFormatException e) {
            System.out.println("数据格式不正确异常");
        }catch (ArithmeticException e ){
            System.out.println("算数异常");
        }
    }
}

Demo02

package edu.xcdq;

import java.util.InputMismatchException;
import java.util.Scanner;

/**
 * @author yuhuicun
 * @date 2021/4/27 15:15
 */
public class Demo03 {
    public static void main(String[] args) {

        int[] a = new int[2];
        Scanner scanner = new Scanner(System.in);
        try {
            int i = scanner.nextInt();
            int j = scanner.nextInt();
            a[0] = i;
            a[2] = j;
            System.out.println(a[0] / a[2]);
        } catch (ArrayIndexOutOfBoundsException | InputMismatchException | ArithmeticException e) {
            System.out.println("数组越界异常");
            System.out.println("数据格式不正确异常");
            System.out.println("算数异常");
            System.out.println("以上异常中的一个");
        }
    }
}