✅Queue 队列⛔Enumeration⛔SortedMap⛔Map.Entry⛔Map⛔SortedSet⛔Set✅Stack vs Queue vs Deque✅Deque 双端队列⛔Iterator✅Stack 栈⛔Vector 动态数组⛔AbstractList⛔List⛔AbstractCollection⛔Collection⛔Iterable
