java-Classes and objects

Classes and objects

1. Objects

Cases:

Customer Category	Property: Age: 26 Weight: 60kg Name: Li Ming	Method: Buy things Pay money
Cashier class	Property: Age: 30 Weight: 70kg Name: Xiao Ming	Method: Collect money Credit card

2. Class:

is a mold that contains the properties and methods of the object, and the class is the type of the object.

3. Package:

Encapsulation is the wrapping of a thing (covering properties and methods).

Cases:

public class school{

Defining classes

//struct contains the variable

Char *name;

int age; ;

Ways to define people

public void People() {

System.out.println (name+ "name" +age+ "Age");

}
}

//define variables by struct

People a =new people

Assigning a value to an object

A. Name = "Xiaoming";
A. Age = ;

java-Classes and objects