练习1

package com.atguigu.exercise1;
public class EcmDef {
    public static void main(String[] args) {
        try{
            int i = Integer.parseInt(args[0]);
            int j = Integer.parseInt(args[1]);
            int result = ecm(i,j);
            System.out.println(result);
        }catch(NumberFormatException e){
            System.out.println("数据类型不一致");
        }catch(ArrayIndexOutOfBoundsException e){
            System.out.println("缺少命令行参数");
        }catch(ArithmeticException e){
            System.out.println("算术异常");
        }catch(EcDef e){
            System.out.println(e.getMessage());
        }
    }
    public static int ecm(int i,int j) throws EcDef{
        if(i < 0 || j < 0){
            throw new EcDef("分子或分母为负数了！");
        }
        return i / j;
    }
}

package com.atguigu.exercise1;
//自定义异常类：
public class EcDef extends Exception{
    static final long serialVersionUID = -7034896193246939L;
    public EcDef(){
    }
    public EcDef(String msg){
        super(msg);
    }
}