Lesson 46

//QUESTION 1
// A List keeps things stored by an index, while a Set stores things by either hash codes or a tree structure or however the program wants to do so.

//QUESTION 2
// One may either retrieve an array or iterator that will allow you to loop through them as normal.

//QUESTION 3
// One would cast them to an Integer before using s.add(Integer).

//QUESTION 4
// HashSet and TreeSet

//QUESTION 5
s.iterator();

//QUESTION 6
// hasNext(), next(), remove()

//QUESTION 7
// A Set object has built-in algorithms that make them faster.

//QUESTION 8
// isEmpty(), size() == 0, or clear()

//QUESTION 9
// 6

//QUESTION 10
s.removeAll(s);