chapter12-异常（Exception）——（作业）——day15

目录

457-异常课后作业

458-异常课后作业2

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457-异常课后作业

package chapter12.exception.homework;

/**
 * @author LuHan
 * @version 1.0
 */
public class Homework01 {
    public static void main(String[] args) {
        try {
            if(args.length!=2){
                throw new ArrayIndexOutOfBoundsException("参数个数要是2个");
            }
            int n1=Integer.parseInt(args[0]);
            int n2=Integer.parseInt(args[1]);
            double res=cal(n1,n2);//抛出算数异常，运行异常
            System.out.println("计算结果是"+res);
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println(e.getMessage());
        }catch (NumberFormatException e){
            System.out.println("参数格式不正确，需要输入整数");
        }catch (ArithmeticException e){
            System.out.println("出现了除0异常");
        }
    }
    public static double cal(int n1,int n2){
        return n1/n2;
    }
}

458-异常课后作业2