I am getting some error in this program and i am not able to fix it. The problem is with get (i)

public default boolean addAll(Collection otherList ) {

// Left as an assignment

// return true if the list changed as a result of the call

Full Code:

import java.util.Collection;

// Collection interface info:

// https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html

public interface MyList extends Collection{

/** Add a new element at the specified index in this list */

public void add(int index, E e);

/** Return the element from this list at the specified index */

public E get(int index);

/** Return the index of the first matching element in this list.

* Return -1 if no match. */

public int indexOf(Object e);

/** Return the index of the last matching element in this list

* Return -1 if no match. */

public int lastIndexOf(E e);

/** Remove the element at the specified position in this list

* Shift any subsequent elements to the left.

* Return the element that was removed from the list. */

public E remove(int index);

/** Replace the element at the specified position in this list

* with the specified element and returns the new set. */

public E set(int index, E e);

@Override /** Add a new element at the end of this list */

public default boolean add(E e){

add(size(), e);

return true;

}

@Override /** Return true if this list contains no elements */

public default boolean isEmpty(){

return size() == 0;

}

@Override /** Remove the first occurrence of the element e

* from this list. Shift any subsequent elements to the left.

* Return true if the element is removed. */

public default boolean remove(Object e){

if (indexOf(e) >= 0){

remove(indexOf(e));

return true;

}

else

return false;

}

@Override

public default boolean containsAll(Collection c) {

for (Object e: c)

if (!this.contains(e))

return false;

return true;

}

/** Adds the elements in otherList to this list.

* Returns true if this list changed as a result of the call */

@Override

public default boolean addAll(Collection otherList ) {

// Left as an assignment

// return true if the list changed as a result of the call

for (int i=0; i

add(otherList.get(i));

}

return !otherList.isEmpty();

}

@Override

public default boolean removeAll(Collection c ){

// Left as an assignment

// Returns true if this list changed as a result of the call

Collection otherList = null;

boolean returnValue = false;

for (int i=0; i

while (remove(otherList.get(i))) {

returnValue = true;

}

}

return returnValue;

}

/** Retains the elements in this list that are also in otherList

* Returns true if this list changed as a result of the call */

@Override

public default boolean retainAll(Collection c){

// Left as an assignment

// Returns true if this list changed as a result of the call

Collection otherList = null;

boolean returnValue = false;

for (int i=0; i

while (!otherList.contains(get(i))) {

remove(i);

returnValue = true;

}

}

return returnValue;

}

}

for (int i=0; i

add(otherList.get(i));

}

return !otherList.isEmpty();

}

@Override

public default boolean removeAll(Collection c ){

// Left as an assignment

// Returns true if this list changed as a result of the call

Collection otherList = null;

boolean returnValue = false;

for (int i=0; i

while (remove(otherList.get(i))) {

returnValue = true;

}

}

return returnValue;

}