Introduction to OOP (Java)

1. Chapter 1
Basic OOP Concept

2. Basic Concept
Object
Class
Inheritence
Polimorphism
Encapsulation
Data Abstraction
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3. Class
In OO model, some of the objects
exhibits identical characteristics
(information structure and
behavior)
Structure that contains common
data and function as entity for
object
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4. Object
Instance of classes
A person, place or concept
Has attributes, state and behavior
Interact sending message to each
other
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5. Example - Class
Dimas studies mathematics
Femy studies software engineering
Ganang studies computer science
Each one is a Student
These are called object of the
Student class
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6. Struktur Class
class car {
Nama class
int fuel; int maxSpeed;
public car() {
MaxSpeed=0;
}
refuel() {
}
SetSpeed(){
}
}
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method
attributes
constructor

7. Declaration of an object
class Rectangle {
int width;
int height;
public void set
(int w, int l){
}
}
main() {
Rectangle rect1;
Rectangle rect2;
rect1.set(4,9);
rect2.set(5,8);
}
Rect1 → width = 4
and length = 9
Rect2 → width = 5
and length = 8
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8. Let's write some codes...
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