单项选择题
现有:
class Bird {
void talk() { System.out.print("chirp "); }
}
class Parrot2 extends Bird {
protected void talk() { System.out.print("hello ");
public static void main(String [] args) {
Bird [] birds = {new Bird(), new Parrot2 () };
for( Bird b : birds)
b.talk () ;
}
}
结果是什么 ?()
A. chirp chirp
B. hello hello
C. chirp hello
D.编译错误
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