申論題

 11. public static int sum(List list){ 

12. int sum = 0； 

13. for(Iterator iter = list.iterator()； iter.hasNext()；){ 

14. int i = ((Integer)iter.next()).intValue()；

 15. sum += i； 

16. } 

17. return sum； 

18. } 

What three changes allow the class to be used with generics and avoid an unchecked warning? (Choose three.) (A) Remove line 14. (B) Replace line 14 with "int i = iter.next()；". (C) Replace line 13 with "for(int i : intList){". (D) Replace line 13 with "for(Iterator iter : intList){". (E) Replace the method declaration with "sum(List＜int＞ intList)". (F) Replace the method declaration with "sum(List＜Integer＞ intList)".