Can I see the code for this? [JAVA] I'd like to see if we could make it interactive, aka the buying and selling of an item.

Write a class, named MyArrayList that manages a collection of numbers, allowing to construct an array of given size (making a constructor, named MyArrayList(int size)) set an item at a given index (making a method, named set(int index, int newitem)) get an item at a given index (making a method, named get(int index)) append an item (making a method, named add(int newitem)) remove an item at a given index (making a method, named remove(int index)) retrieve the number of items (making a method, named size()) expand the collection by doubling the size and copy existing items into the new collection (making a method, named expandAndCopyArray())