About inheritance __java in Java

First, open the question and tell the knowledge points clearly.

1. If the subclass inherits the attribute, then the subclass will copy a copy from the parent class, and the value is exactly the same, that is, it has its own property in the object and is exactly the same as the parent class

2. If the subclass inherits the method, then the subclass does not get exactly the same in the parent class, but when it is called, it goes to the parent object to find the inherited method and then executes it and why it can be found. Because their memory address is next to each other.

As shown in the following figure

The inherited method of this presentation (output is 10 instead of-990)

The following illustration shows the inheritance properties