��ö��·ʹ ��лѭ�ҷ���Դ��鹡Ѻ Constructor ��Ѻ

[Admin]

public class testExtend {

public static void main(String[] args) {
new child();
}

}

class parent{
parent(String para){
System.out.println("This is Parent :"+para);
}

//������� Constructor Ẻ������仨�����ջѭ��
parent(){
System.out.println("������¡�� super(); �����¡�������Ѻ");
}


}



class child extends parent{

public child() {
//�ç����ѹ�����¡ super(); ��������ը֧ Compile Error
System.out.println("This is Child");
}

}

[Admin]

class child extends parent{

public child() {
this("��ҷ������");
System.out.println("This is Child");
}

public child(String A) {
this();
System.out.println("This is Child have Parameter"+A);
}
}

Ẻ���� Compile error ���� recursive constructor invocation

[Admin]

class child extends parent{

public child() {
// Ẻ������������ ���¡ �� 1 �������ҹ��
super("��ҡ�ͺ��ҹ");
this("��ҷ������");

System.out.println("This is Child");
}

public child(String A) {
//this();
super("��ҡ�ͺ��ҹ");
System.out.println("This is Child have Parameter "+A);
}
}