Iterator Interface

We must implement the inherited iterator method in the ArrayIndexedList.

public class ArrayIndexedList<T> implements IndexedList<T> {

  // No changes were made to other operations.

  @Override
  public Iterator<T> iterator() {
    return Arrays.stream(data).iterator();
  }
}

Java's Arrays class provides many utilities to work with arrays, including one to build an iterator for an array. We will shortly build our iterator from the ground up!

Note, the only addition to the ArrayIndexedList class is the method above. There are no other changes made (in particular, no changes made to the declaration of ArrayIndexedList).

You need to import the Iterator interface and the Arrays class in the ArrayIndexedList.java file.

import java.util.Arrays;
import java.util.Iterator;