ListADT - A List is a general container storing a...

/**
* A List is a general container storing a contiguous collection of items,
* that is position-oriented using zero-based indexing and where duplicates
* are allowed. ListADT extends the Iterable interface so that Lists can
* be used with for-each loops.
*/
import java.lang.Iterable;
public interface ListADT<E> extends Iterable<E> {
/**
* Adds item to the end of the List.
*
* @param item the item to add
* @throws IllegalArgumentException if item is null
*/
void add(E item);
/**
* Adds item at position pos in the List, moving the items originally
in
* positions pos through size() - 1 one place to the right to make
room.
*
* @param pos the position at which to add the item
* @param item the item to add
* @throws IllegalArgumentException if item is null
* @throws IndexOutOfBoundsException if pos is less than 0 or greater
* than size()
*/
void add(int pos, E item);
/**
* Returns true iff item is in the List (i.e., there is an item x in
the List
* such that x.equals(item))
*
* @param item the item to check