public class Pet{
private String name;
public Pet(){
System.out.print(1); }
public Pet(String name){
System.out.print(2);
} }
public class Dog extends Pet{ public Dog(){
System.out.print(4); }
public Dog(String name){
//這里隱藏了一句代碼:super.pet();
this();
System.out.print(3); } }
執(zhí)行new Dog(“棕熊”);后程序輸出是哪項?()
A. 143
B. 423
C. 243
D. 1134