P 3 object_oriented_programming
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The document discusses object oriented programming (OOP) and some of its key concepts including objects, abstraction, encapsulation, polymorphism, and inheritance. It provides examples to illustrate encapsulation, including defining private and public access modifiers in a class. Encapsulation allows restricting access to some class members like fields and methods, while public access makes members accessible anywhere.
![Representasi dalam Program
Class Animal{
string color;
bool canWrite;
Animal(bool _canWrite){
canRun = _canWrite;
}
void setColor(string _color){
color = _color;
}
void write(){
if (canWrite){
System.out.println(Wow...it can write);
}
}
}
Class AnimalTest{
public static void main(string [] Args){
Animal dog = new Animal(true);
Animal sheep = new Animal(false);
dog.write();
dog.color = red;
dog.setColor(red);
}
}](https://image.slidesharecdn.com/p3objectorientedprogramming-161016162533/85/P-3-object_oriented_programming-7-320.jpg)
![Private
Definition: The type or member can be accessed only by code in
the same class or struct.
Contoh:
Class Mahasiswa(){
private string nik;
private string nama;
private string getNama(){
return nama;
}
}
Class Universitas(){
public static void main(String [] args){
Mahasiswa mhs = new Mahasiswa();
System.out.print(mhs.nama);
}
}](https://image.slidesharecdn.com/p3objectorientedprogramming-161016162533/85/P-3-object_oriented_programming-10-320.jpg)
P 3 object_oriented_programming
- 1. Object Oriented Programming Irfan Wahyudin, S.Si, M.Kom
- 2. Pertemuan Sebelumnya... Top down/bottom up Programming Structured Programming Procedural Programming
- 3. Mengapa Perlu OOP? Top-Down/Bottom-Up Programming Spaghetti Code Structured Programming Tidak reusable Procedural Programming Sudah reusable, tetapi belum merepresentasikan object, belum modular, dan hard-to-manage
- 4. Object Oriented Programming Untuk itu dikembangkan OOP Konsep dasar OOP: Objek Abstraksi Enkapsulasi Polimorfisme Inheritance
- 7. Representasi dalam Program Class Animal{ string color; bool canWrite; Animal(bool _canWrite){ canRun = _canWrite; } void setColor(string _color){ color = _color; } void write(){ if (canWrite){ System.out.println(Wow...it can write); } } } Class AnimalTest{ public static void main(string [] Args){ Animal dog = new Animal(true); Animal sheep = new Animal(false); dog.write(); dog.color = red; dog.setColor(red); } }
- 8. Contoh lain... class Saving { public class Account { private decimal accountBalance = 5000; private decimal registrationFee = 200; public void deposit(decimal amount) { amount = amount - registrationFee; accountBalance += amount; } } static void Main() { Account myAccount = new Account(); MyAccount.accountBalance += 2000; decimal myBalance = myAccount.deposit(2000); } }
- 9. Access Modifiers Private Protected Public
- 10. Private Definition: The type or member can be accessed only by code in the same class or struct. Contoh: Class Mahasiswa(){ private string nik; private string nama; private string getNama(){ return nama; } } Class Universitas(){ public static void main(String [] args){ Mahasiswa mhs = new Mahasiswa(); System.out.print(mhs.nama); } }
- 11. Public Definition: The type or member can be accessed by any other code in the same assembly or another assembly that references it.
- 12. Protected Definition: The type or member can be accessed only by code in the same class or struct, or in a class that is derived from that class. Penggunaan: Lebih banyak pada kasus turunan class (Inheritance)