2. Object Oriented
Programming) OOP

3. object
request) object
operation)
- Program object
message)
message request
function object
- Object
object object object
- Object
type/class)

4. Object 2
data
Object 1
data
Object 4
data
Object 3
data
Object
Message Object

5. object data
method
template)
Object)
Object
Object
Attribute) Object
Behavior)

6. Object
Object
identity
Attribute
(Variable)
State Object
Object
Message State
Attribute (Value of
Attribute)
Behavior Object
Object

7. Encapsulation -
methods
properties
Inheritance -
subclass)
Abstraction -
object
Polymorphism -
method

8. Encapsulation)
private
public get/set
data class Full Encapsulation
class

9. Inheritance)
Class
Class
Class
- Class
Subclasses
- Class Superclass
Reusable)
Class Superclass Class
Single Inheritance)
extends

10. - Overridden method
- Dynamic Binding
OOP
Object class main
>> object
x
>> class
object
class x {
public static void main(String args[]) {
System.out.println("x");

11. object class class
object
>> object object 1
object 2
class x {
public static void main(String args[]) {
int i = 1;
System.out.println(i);
ok(); }
static void ok() {
System.out.println("xx");
}
}
// Result of this program
// 1
// xx