下面程序的运行结果是( )。class Animal{ public Animal(){ System.out.println("I'm an animal."); }}class Bird extends Animal{ public Bird(){ System.out.println("I'm a bird."); }}public class AnimalTest{ public static void main(String[] args) { Bird b = new Bird(); }}
选项:
A:编译错误;
B:无输出结果;
C:I'm a bird.;
D:I'm an animal.I'm a bird.
发布时间:2024-03-31 20:48:57