Failure Notes _ abnormal child the parent class

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This link: https://blog.csdn.net/Leon_Jinhai_Sun/article/details/102753254

package com.learn.demo03.Exception;
/*
    子父类的异常:
        - 如果父类抛出了多个异常,子类重写父类方法时,抛出和父类相同的异常或者是父类异常的子类或者不抛出异常。
        - 父类方法没有抛出异常，子类重写父类该方法时也不可抛出异常。此时子类产生该异常，只能捕获处理，不能声明抛出
    注意:
        父类异常时什么样,子类异常就什么样
 */
public class Fu {
    public void show01() throws NullPointerException,ClassCastException{}
    public void show02() throws IndexOutOfBoundsException{}
    public void show03() throws IndexOutOfBoundsException{}
    public void show04() throws Exception {}
}

class Zi extends Fu{
    //子类重写父类方法时,抛出和父类相同的异常
    public void show01() throws NullPointerException,ClassCastException{}
    //子类重写父类方法时,抛出父类异常的子类
    public void show02() throws ArrayIndexOutOfBoundsException{}
    //子类重写父类方法时,不抛出异常
    public void show03() {}

    /*
        父类方法没有抛出异常，子类重写父类该方法时也不可抛出异常。

     */
    //public void show04() throws Exception{}

    //此时子类产生该异常，只能捕获处理，不能声明抛出
    public void show04()  {
        try {
            throw  new Exception("编译期异常");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}