����� Polymorphism ��Ѻ

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a1 aa=new c1();
1. Constructor ��ͧ c1
2. Method ��ͧ a1
���� c1 override method �ͧ a1 �����ͧ c1


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public class ConExtends {

public static void main(String[] args) {
a1 aa=new c1(); // ���¡�� Constructor �ͧ c1
aa.a1(); // ���¡�� method �ͧ a1
// aa.b1(); // ���¡�� method �ͧ b1 Error ���������ѡ b1


b1 bb1=new c1(); // ���¡�� Constructor �ͧ c1
bb1.a1(); // ���¡�� method �ͧ a1
bb1.b1(); // ���¡�� method �ͧ b1 ��� Error ���������ѡ b1

c1 cc=new c1(); // ���¡�� Constructor �ͧ c1
cc.a1(); // ���¡�� method �ͧ a1
cc.b1(); // ���¡�� method �ͧ b1 ��� Error ���������ѡ b1


}

}

class a1{
a1(){
System.out.println("A1 Constructor");
}

void a1(){
System.out.println("A1 Method");
}

}

class b1 extends a1{
public b1() {
System.out.println("B1 Constructor");
}

/* // ������ Commant ��ǹ����͡
void a1(){
System.out.println("B1 Method");
}
*/
void b1(){
System.out.println("B1 Method");
}
}

class c1 extends b1{
public c1() {
System.out.println("C1 Constructor");
}

/* void a1(){
System.out.println("C1 Method");
}
*/

}


�š���ѹ
B1 Constructor
C1 Constructor
A1 Method
B1 Method
A1 Constructor
B1 Constructor
C1 Constructor
A1 Method

B1 Method