- ArrayList
int size()void add(E element)E get(int index)void set(int index, E element)void remove(int index)String toString()
- HashMap
int size()void put(K key, V value)V get(K key)void remove(K key)String toString()
- LinkedList
int size()void append(E value)void prepend(E value)E get(int index)void insert(E value, int index)boolean remove(E value)E remove(int index)String toString()
- Stack
int size()void push(E value)E peek()E pop()String toString()
- Queue
int size()void enqueue(E value)E peek()E dequeue()String toString()