19-from scratch to JavaWeb-inheritance relationship and method coverage, 19-javaweb-

19-from scratch to JavaWeb-inheritance relationship and method coverage, 19-javaweb-

Video details

Inherit the relationship between child classes and parent classes

Code demonstration of inheriting the relationship between child classes and parent classes

Override of inheritance Methods

Method coverage principle

1. inherit the compiling process

Ii. What content does the subclass inherit from the parent class?

　　

 

You can change the modifier and check whether the subclass can be accessed.

Detailed demonstration in the video

 

 

3. Method coverage

　　

　　　　

 

 

 

Iv. Method coverage principles

　　

 

V. Determine whether the method is Overwrite

 

6. When to use overwriting?

　　

 

 

VII. Differences between method overloading and method coverage

　　

 

Code-software in group file sharing