บทที่ 6 คลาสและการเขียนโปรแกรม
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Object oriented programming is a programming paradigm that uses objects and their interactions to design applications and computer programs. Key concepts of OOP include encapsulation, inheritance, polymorphism, and abstraction. Objects contain data in fields and code in methods that operate on their data which allows objects to receive and respond to messages to perform actions.
![- Overridden method
- Dynamic Binding
OOP
Object class main
>> object
x
>> class
object
class x {
public static void main(String args[]) {
System.out.println("x");](https://image.slidesharecdn.com/6-130108044836-phpapp01/85/6-10-320.jpg)
![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](https://image.slidesharecdn.com/6-130108044836-phpapp01/85/6-11-320.jpg)
บทที่ 6 คลาสและการเขียนโปรแกรม
- 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