О‘zgaruvchi va metodlarga murojaat

/* Obyekt yaratish*/
ObjectReference = new Constructor();
/* obyekt orqali о‘zgaruvchini chaqirish */
ObjectReference.variableName;
/* obyekt orqali metodni chaqirish */
ObjectReference.MethodName();
Misol:
public class Puppy{ int puppyAge;
public Puppy(String name){ System.out.println("Passed Name is :" + name );
}
public void setAge( int age ){
puppyAge = age;
}
public int getAge( ){
System.out.println("Puppy's age is :" + puppyAge ); return puppyAge;
}
public static void main(String []args){
Puppy myPuppy = new Puppy( "tommy" ); myPuppy.setAge( 2 );
myPuppy.getAge( );
System.out.println("Variable Value :" + myPuppy.puppyAge );
}
}
Natija:
Passed Name is :tommy
Puppy's age is :2
Variable Value :2
Encapsulation – bu sinf о‘zgaruvchilarining (maydonlari) himoyalanganligi

Vorislik (inheritance) - boshqa bir sinfdan voris (nasl) olish.Java da nasl olish extends kalit sо‘zidan foydalaniladi.
Misol:
class Android extends MobilePhone { … }

class MobilePhone { public void switch() {
System.out.println(―Phone is switching");
}
}
class Android extends MobilePhone { public void switchoS() {
System.out.println(―Switching Android 4.4");
}
}
public class Demo {
public static void main(String []args) {
Android kitkat = new Android(); kitkat.switch(); kitkat.switchoS();
}
}
Polymorphism - bu grekcha sо‘zdan olingan bо‘lib, - poly - kо‘p,- morphos - formalar,- kо‘p formalilik yoki dasturlash tilida -bir xil metod (obyekt, о‘zgaruvchi) turli xil interfeys (masala) degan ma’noni bildiradi. Bu dasturchi uchun - flexible dastur tuzish imkoniyatini yaratib beradi. Polymorphism ikki xil bо‘ladi:

Runtime (Dynamic) Polymorphism
Compile time (Static) Polymorphism

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