第198題

Given:
11. public static Iterator reverse(List list){
12. Collections.reverse(list);
13. return list.iterator();
14. }
15. public static void main(String[] args){
16. List list= new ArrayList();
17. list.add("1"); list.add("2"); list.add("3");
18. for(Object obj : reverse(list))
19. System.out.print(obj + ", ");
20. }
What is the result?
A. 3, 2, 1,
B. 1, 2, 3,
C. Compilation fails.
D. The code runs with no output.
E. An exception is thrown at runtime.
答案：C
參考：12-2-2 Collections類別、12-4-5 List集合

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18行跑 for each, 呼叫reverse,傳入list.
回傳iterator, 因 for each 不能用iterator物件, 所以編譯失敗.