class Annoyance extends Exception_多态

class Annoyance extends Exception {}
class Sneeze extends Annoyance {}
 
class Human {
 
	public static void main(String[] args) 
		throws Exception {
		try {
			try {
				throw new Sneeze();
			} 
			catch ( Annoyance a ) {
				System.out.println("Caught Annoyance");
				throw a;//抛出一个Annoyance引用
			}
		} 
		catch ( Sneeze s ) {
            //被抓取到Annoyance引用  相当于 a = new  Sneeze();多态(子类对象指向父类引用)
            //父类抛出的异常 子类异常是无法处理的  
			System.out.println("Caught Sneeze");
			return ;
		}
		finally {
			System.out.println("Hello World!");
		}
	}
}

x

 

1

class Annoyance extends Exception {}

2

class Sneeze extends Annoyance {}

3

4

class Human {

5

6

    public static void main(String[] args) 

7

        throws Exception {

8

        try {

9

            try {

10

                throw new Sneeze();

11

            } 

12

            catch ( Annoyance a ) {

13

                System.out.println("Caught Annoyance");

14

                throw a;//抛出一个Annoyance引用

15

            }

16

        } 

17

        catch ( Sneeze s ) {

18

            //被抓取到Annoyance引用  相当于 a = new  Sneeze();多态(子类对象指向父类引用)

19

            //父类抛出的异常 子类异常是无法处理的  

20

            System.out.println("Caught Sneeze");

21

            return ;

22

        }

23

        finally {

24

            System.out.println("Hello World!");

25

        }

26

    }

27

}

28

输出:

Caught Annoyance 

Caught Sneeze 

Hello World!

原文

来自为知笔记(Wiz)