list = Arrays.asList(array); Collection < String > resultList = getLongWords(list); } /* INSERT DECLARATION HERE*/ { Collection < E > longWords = new ArrayList < E > (); for (E word : coll) if (word.length() > 6) longWords.add(word); return longWords; } } Which declarations could be inserted at // INSERT DECLARATION HERE so that the program will compile and run? (Choose all that apply.)" >
list = Arrays.asList(array); Collection < String > resultList = getLongWords(list); } /* INSERT DECLARATION HERE*/ { Collection < E > longWords = new ArrayList < E > (); for (E word : coll) if (word.length() > 6) longWords.add(word); return longWords; } } Which declarations could be inserted at // INSERT DECLARATION HERE so that the program will compile and run? (Choose all that apply.)">
F is correct. A is close, but it's wrong because the return value is too vague. The last line ofthe method expects the return value to be Collection, notCollection. B is wrong because longWords has beendeclared as a Collection, and that can't be implicitly converted to a List tomatch the declared return value. (Even though we know that longWords is really anArrayList, the compiler only know what it's been declared as.) C, D, and E arewrong because they do not declare a type variable E (there's no <> before the returnvalue) so the getLongWords() method body will not compile. G is wrong because Esuper CharSequence makes no sense—super could be used in conjunction with awildcard but not a type variable like E.