Basic Characteristic of Object-Oriented Analysis

1. TIPS – SAD Dudy Fathan Ali S.Kom
Basic Characteristic of Object-Oriented
Analysis
TIPS
Dudy Fathan Ali, S.Kom (DFA)
2015
CEP - CCIT
Fakultas Teknik Universitas Indonesia

2. Tujuan Pembelajaran
TIPS – SAD Dudy Fathan Ali S.Kom
Peserta didik mengenal karakteristik dasar dari sistem
berorientasi obyek.

3. Karakteristik Dasar Sistem Berorientasi Obyek
TIPS – SAD Dudy Fathan Ali S.Kom
Object-oriented systems focus on capturing the structure and
behavior of information systems in little modules that
encompass both data and processes. These little modules are
known as objects. - System Analysis & Design (Dennis, Wixom, Roth)
Karakteristik dasar dari Sistem Berorientasi Obyek :
Class and Object
Method and Message
Encapsulation and Information Hiding
Inheritance
Polymorphism and Dynamic Binding

4. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
Class
A class is the general template we use to define and create specific
instances, or objects.
Object
An object is an instantiation of a class. In other words, an object is a
person, place, event, or thing about which we want to capture
information
Every object is associated with a class.

5. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
Each object has attributes that describe information about the object, such as a
customer’s name, address, e-mail, and phone number.

6. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Customer
{
public string name;
public string address;
public string phone;
public void insert(string name, string address, string phone)
{
// do something here!
}
}
Atribut digunakan untuk
mendeskripsikan informasi dari
suatu object.

7. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Customer
{
public string name;
public string address;
public string phone;
public void insert()
{
// do something here!
}
}
Method digunakan untuk
mendeskripsikan aksi yang bisa
dilakukan oleh suatu object.

8. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Program
{
public static void Main(String[] args)
{
Customer aCustomer = new Customer();
aCustomer.name = “DFA”;
aCustomer.address = “Jakarta”;
aCustomer.phone = “0218734575”;
aCustomer.insert();
}
}
Membuat Object dari kelas Customer dengan nama aCustomer.

9. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Program
{
public static void Main(String[] args)
{
Customer aCustomer = new Customer();
aCustomer.name = “DFA”;
aCustomer.address = “Jakarta”;
aCustomer.phone = “0218734575”;
aCustomer.insert();
}
}
Memasukkan informasi kepada object aCustomer.

10. Method and Messages
TIPS – SAD Dudy Fathan Ali S.Kom
Methods implement an object’s behavior. A method is nothing
more than an action that an object can perform. Methods are very
much like a function or procedure in a traditional programming
language such as C, COBOL, or Pascal.

11. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Customer
{
public string name;
public string address;
public string phone;
public void insert()
{
// do something here!
}
}
Behaviour yang dimiliki oleh
suatu class.

12. Class and Object
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Program
{
public static void Main(String[] args)
{
Customer aCustomer = new Customer();
aCustomer.name = “DFA”;
aCustomer.address = “Jakarta”;
aCustomer.phone = “0218734575”;
aCustomer.insert();
}
}
Instruksi yang dikirimkan ke object untuk menjalankan suatu function.

13. Encapsulation and Information Hiding
TIPS – SAD Dudy Fathan Ali S.Kom
Encapsulation is simply the combining of process and data into a single
entity. Object-Oriented approaches combine process and data into an
Object.
The principle of information hiding suggests that only the information
required to use a software module be published to the user of the module.

14. Inheritance
TIPS – SAD Dudy Fathan Ali S.Kom
inheritance is when an
object or class is based
on another object or
class, using the same
implementation
(inheriting from a class)
specifying
implementation to
maintain the same
behavior.

15. Inheritance
TIPS – SAD Dudy Fathan Ali S.Kom

16. Inheritance
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class Person
{
protected string lastname;
protected string firstname;
protected string address;
protected string homephone;
public void updateaddress()
{
//do something here
}
}
Class Employee : Person
{
private string hiredate;
private string paygrade;
public void updatepaygrade()
{
lastname = “Baswedan”;
firstname = “Anies”;
address = “Jakarta”;
homephone = “0219384833”;
hiredate = “2015-01-01”;
paygrade = “8,000,000”;
//code for update here
}
}
Menunjukan bahwa Class
Person mewarisi struktur
data dan behaviour
kepada Class Employee

17. Polymorphism and Dynamic Binding
TIPS – SAD Dudy Fathan Ali S.Kom
Polymorphism means that the same message can be interpreted
differently by different classes of objects.
In programming languages and type theory, polymorphism (from Greek
πολύς, polys, "many, much" and μορφή, morphē, "form, shape") is the
provision of a single interface to entities of different types.
Polymorphism is made possible through dynamic binding. Dynamic, or
late, binding is a technique that delays identifying the type of object until
run-time.

18. Polymorphism and Dynamic Binding
TIPS – SAD Dudy Fathan Ali S.Kom

19. Polymorphism and Dynamic Binding
TIPS – SAD Dudy Fathan Ali S.Kom
In a programmer’s perspective :
Class HitungAngka
{
public void proseshitung(int a, int b)
{
//code here
}
public void proseshitung(int a, int b, int c)
{
//code here
}
}
Hal ini tidak akan membuat error, karena OOP telah
mendukung fitur Polymorphism.

20. TIPS – SAD Dudy Fathan Ali S.Kom
Terima Kasih
Dudy Fathan Ali S.Kom
dudy.fathan@eng.ui.ac.id