Objects & Classes

1. CHAPTER 4
OBJECTS & CLASSES
Mr.Warawut Khangkhan
e-Mail: awarawut@hotmail.com
Social Media: www.facebook.com/AjWarawut

2. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
2

3. F F
F
Mr.Warawut
Khangkhan
F
Chapter 4 Objects & Classes
Top-Down Bottom-Up
F F ˈ
FF F F F
(Information
Hiding)
F ˆ F F F F
3
(Encapsulation)

4. OBJECTS & CLASSES
Mr.Warawut
Khangkhan
Class F
object F F F
Chapter 4 Objects & Classes
Object F F
F , ,F
F
4

5. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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Class name
OBJECTS & CLASSES
Attribute
Method

6. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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OBJECTS & CLASSES

7. OOP
Mr.Warawut
Khangkhan
Abstraction – ˈ F F F F
class ˈ F F F
Chapter 4 Objects & Classes
F F F attribute method
Encapsulation – ˈ F F F F F
F F class
Inheritance – ˈ F class
attribute method class F F
class
Polymorphism – ˈ F
7
class F

8. Mr.Warawut Khangkhan Chapter 4 Objects & Classes
Objects & Classes
F CLASS
8

9. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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F CLASS
attribute
method
class

10. CLASS
Mr.Warawut
Khangkhan
[ modifier ] class className {
[ attributeName ]
Chapter 4 Objects & Classes
[ methodName ]
}
public class Student {
…
}
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11. ATTRIBUTE
Mr.Warawut
Khangkhan
[ modifier ] dataType attributeName ;
Chapter 4 Objects & Classes
public class Student {
String name;
int age;
}
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12. METHOD
Mr.Warawut
Khangkhan
[ modifier ] returnType methodName
([parameter]) {
Chapter 4 Objects & Classes
[ method_body ]
varValue;
return varValue;
};
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13. METHOD
Mr.Warawut
Khangkhan
public class Student {
String name;
Chapter 4 Objects & Classes
int age;
public void setData( ) {
setData(
“Warawut
Warawut”;
name = “Warawut”;
50;
age = 50;
}
getData(
public void getData( ) {
System.out.println(“Name:
System.out.println(“Name: ” + name);
System.out.println(“Age:
System.out.println(“Age: ” + age);
}
} 13

14. Mr.Warawut Khangkhan Chapter 4 Objects & Classes
Objects & Classes
CLASS
F
14

15. OBJECT
Mr.Warawut
Khangkhan
[ modifier ] className objectName;
objectName;
Chapter 4 Objects & Classes
F object
objectName = new className( );
className(
F object F
[ modifier ] className objectName =
className(
new className( );
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16. F CLASS
Mr.Warawut
Khangkhan
objectName.attributeName;
objectName.attributeName;
Chapter 4 Objects & Classes
method F F
objectName.methodName( [argument] );
objectName.methodName(
method F
dataType methodValue =
objectName.methodName(
objectName.methodName( [argument] );
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17. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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18. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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19. Mr.Warawut Khangkhan Chapter 4 Objects & Classes
Chapter 4 Objects & Classes
MODIFIER
JAVA
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20. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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JAVA
MODIFIER

21. MODIFIER JAVA
Mr.Warawut
Khangkhan
Non Access Modifier
Access Modifier
Chapter 4 Objects & Classes
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22. NON ACCESS MODIFIER
Mr.Warawut
Khangkhan
key word F F F
F F class F
Chapter 4 Objects & Classes
static F ˈ key word F
attribute method ˈ static
modifier
final F ˈ key word F
attribute class ˈ final
modifier
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23. NON ACCESS MODIFIER -
STATIC
Mr.Warawut
Khangkhan
attribute ˈ static
F
Chapter 4 Objects & Classes
F F F object
method ˈ static
F F F class
F class F class F F F F
object
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24. NON ACCESS MODIFIER -
FINAL
Mr.Warawut
Khangkhan
attribute F F F
Chapter 4 Objects & Classes
class F F class
F
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25. ACCESS MODIFIER
Mr.Warawut
Khangkhan
key word F F F ˈ
F F class
Chapter 4 Objects & Classes
˂ F
class F class
F F
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26. ACCESS MODIFIER
Mr.Warawut
Khangkhan
F Access Modifier ˈ 4
Chapter 4 Objects & Classes
public F F F class
private F F F class
F
protected F F F class
class
package F F F class
class F package 26

27. Mr.Warawut Khangkhan Chapter 4 Objects & Classes
Objects & Classes
PRIVATE
F
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28. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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29. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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30. Mr.Warawut Khangkhan Chapter 4 Objects & Classes
Objects & Classes
PROTECTED
F
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31. Mr.Warawut
Chapter 4 Objects & Classes
Khangkhan
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