. Net C # self-taught diary Class Object attribute method package concurrency multi-thread Polymorphism

Ah ~ Speechless

I know a lot of things apart, and I don't know them together.

Take notes honestly and accumulate learning.

Today, I have my own ideas. These simple things are designed to make yourself a habit.

 

Class, not to mention the abstraction of a group of common things;

The object is a class instance;

References are indexes of objects;

Attributes are the characteristics of a class;

A method is a class action;

A package is a namespace.

 

Eg:

Headers, hands and feet (attributes)

These things that can walk (methods) are called

Person (class );

James (object) is a person (class );

James's name (reference) is unknown;

Chinese (BAG) Foreigners (BAG) are people (class );

 

Polymorphism. Long shengjiu Zi. Sub-child is different.

Dragon has a virtual method, but it should be implemented by the son.

 

Multithreading is a means of concurrency, and the current technology does not seem to need to be too clear about the two points.