单项选择题
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(String name){
//这里隐藏了一句代码:super.pet();
System.out.print(3);
}
}
执行new Dog(“棕熊”);后程序输出是哪项?()
A. 23
B. 1 3
C. 123
D. 321
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