Question: What's the output of the following program?
1 import java.util.*;
2 class Dog {public String toString(){return "dog";}}
3 class Cat {public String toString(){return "cat";}}
4 public class Cats {
5 public static void main(String[] args) {
6 List cats = new ArrayList();
7 cats.add(new Cat());
8 cats.add(new Dog());
9 catDisplay(cats);
10 }
11 private static void catDisplay(List objs) {
12 for(Object obj: objs) {
13 Cat cat = (Cat)obj;
14 System.out.println(cat);
15 }}}
Choice:
A. cat
B. dog
C. ClassCastException at run time
D. compiler error at line 7
E. compiler error at line 8
F. compiler error at line 9
G. compiler error at other lines
