About Me
Teaching paradigm
Learn It => Master It => Apply It
知识不是力量，
只有能被我们支配和利用的知识才是力量
OOPS
-
Stands for Object-Oriented Programming Style
-
The most used programming paradigm
-
Treat everything as object that can interact with each other
Class vs object
Class
- A blueprint, a description, an idea that we use to create object
- A class defines fields (a.k.a. attributes or properties) and behaviors (methods)
Object
- We create object based on class
- We can create multiple objects based on one class
CREATE AIRPLANE
Fields (a.k.a. attributes or properties):
- Weight
- Color
- Airline
- ...
Behaviors (a.k.a. methods):
- Take off
- Land
- ...
DEFINE AIRPLANE class
public class Airplane {
// Fields (a.k.a. attributes or properties)
String color;
String airline;
// Constructor (instruction for instantiating an airplane object)
public Airplane(String color, String airline) {
this.color = color;
this.airline = airline;
}
// Behaviors (a.k.a. methods)
public void takeOff() {
...
}
public void land() {
...
}
}INSTANTIATE AIRPLANE object
// Instantiate airplane objects based on Airplane class
Airplane myAirplane = new Airplane("blue", "China Southern Airline");
Airplane urAirplane = new Airplane("yellow", "American Airline");
// Use airplane behaviors (methods)
myAirplane.takeOff();
urAirplane.land();LET'S try CREATEing human
Fields (a.k.a. attributes or properties)
Behaviors (a.k.a. methods)
in THE WILD (real world)
in THE WILD (VIRTUAL WORLD)
YALI Demo Class
By Zico Deng
