03-Create classes and objects from zero-play javaweb-

Create Class
Creating objects

First, what is the member variable

Some state features of an object use member variables to represent

Ii. behavior What is the expression of what

Object behavior using method representation

Iii. How to create an object

Class name
{
0 ~ N Member variables
0 ~ N Methods
}

Attention
1: If the class is decorated with public, the current file name must be the same as the class name
2: The type must conform to the naming convention for identifiers (use nouns, uppercase letters).

Iv. Creating object Java code

• Creating objects
• Assign value
• Take value
• Calling methods

03-Create classes and objects from zero-play javaweb-