C # Basic Learning (0630) object-oriented general study

Object-oriented general learning

1. Encapsulation, inheritance, polymorphism

Fields: Store data, access modifiers should be set to private

Properties: Securing fields, qualifying the values and assignments of fields

New keyword:

1. Open space in the heap (the value of the reference type is in the heap)

2. Create objects in the open space

3. Call the constructor of the object (the constructor has no return value)

This keyword:

1. Object representing the current class

2. Call your own constructor

Constructors: Initializing an object (the process of assigning a value to each property of an object is called an initialization of the object), the constructor is called when the object is created

How to protect a field

1. Get ()

2. Set ()

3. Constructor function

Inherit Learning

Solve the code sink redundancy, achieve polymorphism, increase the code extensibility, easy to maintain

1, single-sex (a class can have only one parent class)

2, Transmission of

The subclass does not inherit the constructor of the parent class, but instead calls the parent class's parameterless constructor by default

C # Basic Learning (0630) object-oriented general study