OCM Java Developer認證長久以來被技術人員忽略，可能因為它是一個需要實作應用程式的考試，不像其它認證都是採用選擇題的考試方式，所以Oracle把它歸類在大師的等級。應考人員依照考題的規定實作一個應用程式，從分析、設計到實作，需要把基本的設計模式套用在這個專題，這對一個比較沒有經驗的開發人員來說，會是比較困難一些的。所以在這個專題演講中，也會針對基本的設計模式的應用，使用清楚與容易的方式，讓大家可以輕鬆的進入設計模式的世界。

2. OCM Java
Developer
美商甲骨文
授權教育訓練中心
講師
張益裕

3. OCM Java 開發⼈人員認證
與
設計模式

4. Sun Java Certification
Advanced
Specialty
Sun Certified Enterprise Architect (SCEA)
Sun Certified
Java Developer
(SCJD)
Sun Certified
Web
Component
Developer
(SCWCD)
Sun Certified
Business
Component
Developer
(SCBCD)
Sun Certified
Developer for
Java Web
Service
(SCDJWS)
Foundation
Sun Certified Java Programmer (SCJP)
Entry Level
Sun Certified
Mobile
Application
Developer
(SCMAD)
Sun Certified Java Associate (SCJA)
Java SE
Java EE
Java ME

5. Oracle Certification Program Categories
Oracle
Certified
Associate
Oracle
Certified
Professional
Oracle
Certified
Master
Oracle
Certified
Expert
Oracle
Certified
Specialist

6. Oracle Java Certification
Java SE 6 Developer
Java EE 6 Web
Component Developer
Java SE 5 Programmer
Java SE 6 Programmer
Java SE 7 Programmer
Java SE 7 Programmer
Oracle
Certified
Associate
Oracle
Certified
Professional
Oracle
Certified
Master
Oracle
Certified
Expert

8. Oracle Certified Master
Java SE 6 Developer

9. Certification Path
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM

10. Get Certified Step 1
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM
Oracle Certified Professional
Java SE 5, 6, 7 Programmer
!
Sun Certified Java Programmer
Any Edition

11. Get Certified Step 2
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM
Complete one of approved courses
Instructor-led in class,
Recorded courses
(LWC, LVC, Training On-Demand)

12. Get Certified Step 3
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM
1Z0-855
Java SE 6 Developer Certified Master
Assignment

13. Get Certified Step 4
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM
1Z0-856
Java SE 6 Developer Certified Master Essay
Exam

14. Get Certified Step 5
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM
Complete the Course Submission Form

15. Oracle Certified Master
Prior Certification
Complete Training
Complete Assignment
Complete Essay
Complete Form
OCM

16. Step 3 - Assignment
•
Exam Number: 1Z0-855
•
Duration: 6 months from assignment purchase
•
BOTH assignment and essay must be submitted
within 6 months of assignment purchase date. No
exceptions
•
Assignment must be submitted before you can
register for the essay

17. Assignment Exam Topics
•
A graphical user interface demonstrating good
principles of design
•
A network connection, using a specified protocol, to
connect to an information server
•
A network server, which connects to a previously
specified Java technology database
•
A database, created by extending the functionality of a
previously written piece of code, for which only limited
documentation is available

18. Step 4 - Essay
•
Exam Number: 1Z0-856
•
Duration: 120 minutes
•
BOTH assignment and essay must be submitted
within 6 months of assignment purchase date. No
exceptions
•
Assignment must be submitted before you can
register for the essay

19. Essay Exam Topics
•
List some of the major choices you must make
during the implementation of the above.
•
List some of the main advantages and
disadvantages of each of your choices.
•
Briefly justify your choices in terms of the
comparison of design and implementation
objectives with the advantages and disadvantages
of each

20. Assignment Implementation
Command
Factory Method Decorator
Strategy Observer Composite
Model-View-Controller
Singleton DAO

21. Breakfast Shop

22. Domain Object
Breakfast
{abstract}
#name:String
+getName():String
+price():double
Hamburger
Sandwich
EggCake
+price():double
+price():double
+price():double

23. Breakfast and Sandwich
public abstract class Breakfast {
protected String name = "Unknown";
!
!
public String getName() {
return name;
}
public abstract int price();
}
public class Sandwich extends Breakfast {
public Sandwich() {
name = "三明治";
}
!
@Override
public int price() {
return 15;
}
}

24. Too Much Subclass
Breakfast
{abstract}
#name:String
+getName():String
+price():double
Hamburger
Sandwich
EggCake
+price():double
+price():double
+price():double
SandwichWithCorn
HamburgerWithEgg
+price():double
+price():double
HamburgerWithLettuce
+price():double
HamburgerWithHam
+price():double
EggCakeWithHam
+price():double
EggCakeWithLettuce
SandwichWithEgg
+price():double
+price():double
SandwichWithHam
SandwichWithLettuce
+price():double
+price():double

25. Move to Super Class
public abstract class Breakfast {
protected String name = "Unknown";
Breakfast
{abstract}
#name:String
#egg:boolean
#ham:boolean
#corn:boolean
#lettuce:boolean
+getName():String
+price():double
!
!
!
protected
protected
protected
protected
boolean
boolean
boolean
boolean
...
public int price() {
int result = 0;
if (egg) { result += 10; }
else if (ham) { result += 15; }
else if (corn) { result += 10; }
else if (lettuce) { result += 20; }
!
return result;
}
}
egg;
ham;
corn;
lettuce;

26. Move to Super Class
Breakfast
{abstract}
#name:String
#egg:boolean
#ham:boolean
#corn:boolean
#lettuce:boolean
+getName():String
+price():double
Sandwich
+price():double
public class Sandwich extends Breakfast {
public Sandwich() {
name = "三明治";
}
!
@Override
public int price() {
return super.price() + 15;
}
}

27. 老老闆,我要㆒㈠㊀一個㆔㈢㊂三明治,
加兩兩個蛋,㆔㈢㊂三片㈫㊋火腿,兩兩
份生菜,這樣要多少錢?
...
老老闆
客㆟人

28. Move to Super Class
Breakfast
{abstract}
...
#chocolateSauce:boolean
#peanutSauce:boolean
#cream:boolean
...
Waffle
+price():double
EggCake
+price():double

29. java.io

30. Chaining Stream Together
Reader reader =
new BufferedReader(
new InputStreamReader(
new FileInputStream("Decorator.txt")));
!
int c;
!
while ((c = reader.read()) != -1) {
System.out.print((char)c);
}

31. Chaining Stream Together
read()
read()
read()
FileInputStream
InputStreamReader
BufferedReader

32. APP
APP
Hello! Simon!
Intranet
APP
@^*#%!*&
Internet

33. Java I/O API
InputStream
{abstract}
FileInputStream
FilterInputStream
BufferedInputStream
MyInputStream

34. Chaining Stream Together
public class MyInputStream extends FilterInputStream {
public MyInputStream(InputStream is) {
super(is);
}
!
@Override
public int read() throws IOException {
int data = super.read();
if (data != -1) {
data = data + myMagicCode();
}
return data;
}
}
...

35. Chaining Stream Together
InputStream is =
new BufferedInputStream(
new FileInputStream("readme.txt"));
!
// send to intranet
InputStream is =
new BufferedInputStream(
new MyInputStream(
new FileInputStream("readme.txt")));
!
// send to internet

36. Chaining Stream Together
read()
read()
read()
FileInputStream
MyInputStream
BufferedInputStream

37. Back to Breakfast Shop

38. Java I/O and Breakfast
Breakfast
InputStream
{abstract}
Sandwich...
FileInputStream
FilterInputStream
BufferedInputStream
Ham
Ingredient
MyInputStream
Egg

39. Breakfast Structure
Breakfast
{abstract}
#name:String
+getName():String
+price():double
Hamburger
Sandwich
+price():double
+price():double
Ingredient
+getName():String
Ham
-breakfast:Breakfast
+getName():String
+price():double
Egg
-breakfast:Breakfast
+getName():String
+price():double

40. Breakfast
public abstract class Breakfast {
!
protected String name = "Unknown";
!
public String getName() {
return name;
}
!
public abstract int price();
}

41. Sandwich
public class Sandwich extends Breakfast {
public Sandwich() {
name = "三明治";
}
!
public int price() {
return 15;
}
}

42. Ingredient
public abstract class Ingredient extends Breakfast {
!
public abstract String getName();
!
}

43. Breakfast and Ingredient
public abstract class Breakfast {
!
protected String name = "Unknown";
!
public String getName() {
return name;
}
!
public abstract int price();
}
public abstract class Ingredient extends Breakfast {
!
public abstract String getName();
!
}

44. Ingredient - Egg
public class Egg extends Ingredient {
Breakfast breakfast;
!
public Egg(Breakfast breakfast) {
this.breakfast = breakfast;
}
!
public String getName() {
return breakfast.getName() + "加蛋";
}
!
public int price() {
return 10 + breakfast.price();
}
}

45. Ingredient - Ham
public class Ham extends Ingredient {
Breakfast breakfast;
!
public Ham(Breakfast breakfast) {
this.breakfast = breakfast;
}
!
public String getName() {
return "⽕火腿" + breakfast.getName();
}
!
public int price() {
return 15 + breakfast.price();
}
}

46. Chaining Breakfast Together
+
Breakfast breakfast = new Sandwich();
breakfast = new Ham(breakfast);
+
breakfast = new Egg(breakfast);

47. Chaining Breakfast Together
getPrice()
getPrice()
getPrice()
Sandwich
Ham
Egg

48. 老老闆,我要㆒㈠㊀一個㆔㈢㊂三明治,
加兩兩個蛋,㆔㈢㊂三片㈫㊋火腿,兩兩
份生菜,這樣要多少錢?
ok！這樣
是110元
老老闆
客㆟人

49. A Sandwich with many Ingredients
X2
X3
X2
Breakfast
!
!
breakfast
breakfast
!
breakfast
breakfast
breakfast
!
breakfast
breakfast
breakfast = new Sandwich();
= new Egg(breakfast);
= new Egg(breakfast);
= new Ham(breakfast);
= new Ham(breakfast);
= new Ham(breakfast);
= new Lettuce(breakfast);
= new Lettuce(breakfast);

50. Decorator Pattern
•
⺫⽬目的!
•
•
別名!
•
•
提供附加的功能給物件，不⽤用修改原來的程式碼就可以增加功能
Wrapper
時機!
•
•
希望增加物件的功能時，仍然可以保留物件原來的特性
•
不希望繼承架構過於龐⼤大
•
•
想要在執⾏行時期增加物件額外的功能，但是不會影響到其它物件
不希望⼦子類別繼承⼀一些不會使⽤用到的特性
效果!
•
⽐比繼承架構更靈活。繼承是「編譯時期」的作法；Decorator是「執⾏行時期」的作法
•
在應⽤用程式運作的時候物件可能會太多

51. Decorator Pattern
Component
{abstract}
operation()
ConcreteComponent
+operation()
Decorator
{abstract}
+operation()
ConcreteDecorationA
addedState
+operation()
ConcreteDecorationB
addedState
+operation()

52. Note
＊ Design pattern好像不不是那麼難
＊ 如果因為物件會㈲㊒有許多不不同的樣子而讓繼承架構太大的話,就
可以試試Decorator
ast
Breakf act}
{abstr
＊ 套用Decorator
1. 先不不考慮那些「不不同的樣子」,
把簡單的架構設計出來來
ge
Hambur
r
Sa
ndwich
2. 為那些「不不同的樣子」設計㆒㈠㊀一個
父類類別,加入㆖㊤上面的繼承架構㆗㊥中,
這個類類別就是Decorator
3. 為「不不同的樣子」設計Decorator
的子類類別
＊ 好像會㈲㊒有很多物件...
EggCak
e
Ingredient
{abstract}
Ham
Egg
Corn
Lettuce
...

53. macdidi5@gmail.com
張益裕