I am working on Java Code and am having trouble completing the creation of an ArrayList Class from scratch without using the help of outside libraries.

add (E e) boolean Appends the specified element to the end of this list. add (int index, E element) void Inserts the specified element at the specified position in this list. clear ( ) void Removes all of the elements from this list. contains (Object o) boolean Returns true if this list contains the specified element. get(int index) E Returns the element at the specified position in this list. indexof (Object o) int Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element. isEmpty ( ) boolean Returns true if this list contains no elements. lastIndexOf (Object o) int Returns the index of the last occurrence of the specified element in this list, or -1 if this list does not contain the element. remove (int index) E Removes the element at the specified position in this list. size ( ) int Returns the number of elements in this list. toArray () Object [ ] Returns an array containing all of the elements in this list in proper sequence (from first to last element)