MATERI 5 INTERAKSI ANTAR OBJEK(angga dan syahrul)

INTERAKSIANTAROBJEK
Objektidakberdirisendiri
Objekberinteraksidenganobjek-objeklainnya
Bagaimanaobjek-objekituberinteraksi?
Objekberinteraksitergantungdariinformasi
yangdibutuhkannya

ANALOGIINTERAKSIANTAROBJEK

INTERAKSIANTAROBJEK
KomunikasiA dan B :
 Objek A akan mencari method Objek B yang sesuai
perintah yang akan dikerjakan.
 Berdasarkanservice request, Objek A memberikan
informasi tambahan ke Objek B yang akan diproses.
 Objek B harus mengetahui apakah objek A
mengharapkan objek B untuk memberikan report
balik setelah perintah dikerjakan.

METODE / METHOD

NAMINGCONVENTION
Thefirst letter of the method name is in
lowercase.
Thefirst letter of each subsequent concatenated
word in the method name is in uppercase, and
the remaining characters are in lowercase.
Wedon’t use any “punctuation” characters—
dashes, underscores, etc.—to separate these
words.
Asan example, chooseAdvisor is an appropriate
method name, whereas none of thefollowing
would be appropriate: ChooseAdvisor (uppercase
“C”), chooseadvisor (lowercase “a”),
choose_advisor (separating underscore).

PASSINGARGUMENT
10
The purpose of passing arguments into a method
is twofold[Barker05]:
 To provide it with the (optional) “fuel” necessary to do
its job
 To otherwise guide its behavior in some fashion
Contoh :
 booleanregisterForCourse(StringcourseID,int
secNo)
 boolean registerForCourse()

CONTOHPASSINGARGUMENT
11
public void test() {
int x = 5;
proses(x);
System.out.println(“x1:”+ x);
}
public void proses(int x) {
x = x + 10;
System.out.println(“x2:”+ x);
}
CONTOHPASSINGARGUMENT
12
public void test() {
int x = 5;
proses(x);
System.out.println(“x1:”+ x);
}
public int proses(int x) {
x = x + 10;
System.out.println(“x2:”+ x);
return x;
}

TIPERETURNMETHOD
13
Tipe return method yaitu :
 void
 tipe data primitif
 tipe data user-defined (class)
 array
 collection
Contoh :
 void setName(String newName)
 voidswitchMajor(StringnewDepartment, Professor
newAdvisor)
 Professor getAdvisor()
ANALOGI
14
Aktivitas“household chores”:
 Taking out the trash
 Mowing the lawn
 Washing the car
Berarti dengan aktivitas seperti diatas akan
memilikiclassPersondengan tiga method di
dalamnya. Methodnya yaitu :
 void takeOutTheTrash()
 boolean mowTheLawn()
 void washTheCar(Car c)

REFERENSI
BeginningJavaObject:From Concept toCode.
Author:JACQUIEBARKER
SoftwareEngineering: A Practitioner Approach
7th Edition. Author: Roger S Pressman