[Java知识库]java-异常课后作业1

java-异常课后作业1

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源码
package com.chapter433.Exception;

import jdk.internal.org.objectweb.asm.tree.MultiANewArrayInsnNode;

public class HomeWork01 {
public static void main(String[] args) {
try {
//先验证输入的参数个数是否正确 两个参数
if (args.length != 2)
throw new ArrayIndexOutOfBoundsException(“参数个数不对”);

        //先把接收到的参数 转成整数
        int n1 = Integer.parseInt(args[0]);
        int n2 = Integer.parseInt(args[1]);

        double res = cal(n1,n2);//该方法可能会抛出ArithmeticException
        System.out.println("计算结果是=" + res);

    } catch (ArrayIndexOutOfBoundsException e) {
        System.out.println(e.getMessage());
        e.printStackTrace();
    }catch (NumberFormatException e){
        System.out.println("参=参数格式不正确 需要输出整数");
}catch (ArithmeticException e){
        System.out.println("出现了除0的异常");
    }
}

//编写cal方法 就是两个数的商
public static double cal(int n1,int n2){
    return n1/n2;
}

}