阅读下面程序补全程序代码,并给出输出结果。(备注⑤⑥空格不能填相同代码)import java.util.*;class Cage extends LinkedList{}; class Animal{ public void feedMe(){ };} class Lion extends Animal{public void feedMe(){System.out.println("Feeding lions");}}class ButterFly extends Animal{public void feedMe(){System.out.println("Feeding butterflies");}}public class WildcardTest{public static void main(String args[]){WildcardTest t = new WildcardTest();Cage lionCage = ;Cage butterflyCage = ;lionCage.add(new ③ );butterflyCage.add(new );t.feedAnimals( lionCage );t.feedAnimals(butterflyCage );}void feedAnimals(Cage extends Animal> someCage) { for (Animal a:someCage) a.feedMe();}}
发布时间:2024-03-31 20:48:57