Please review the addToFront() and addToRear() methods in the ArrayUnorderedList class below. They are not quite working for me and I"m not sure where my logic is flawed. I tried to use the already implemented addAfter() method as guideance. Thanks.

/**

* ArrayUnorderedList represents an array implementation of an unordered list.

*

* @author Lewis and Chase

* @version 4.0

*/

public class ArrayUnorderedList extends ArrayList

implements UnorderedListADT

{

/**

* Creates an empty list using the default capacity.

*/

public ArrayUnorderedList()

{

super();

}

/**

* Creates an empty list using the specified capacity.

*

* @param initialCapacity the intial size of the list

*/

public ArrayUnorderedList(int initialCapacity)

{

super(initialCapacity);

}

/**

* Adds the specified element to the front of this list.

*

* @param element the element to be added to the front of the list

*/

@Override

public void addToFront(T element)

{

if(size() == list.length)

expandCapacity();

for(int i = rear; i > 0; i--)

{

list[i] = list[i-1];

}

list[0] = element;

rear++;

modCount++;

}

/**

* Adds the specified element to the rear of this list.

*

* @param element the element to be added to the list

*/

@Override

public void addToRear(T element)

{

if(size() == list.length)

expandCapacity();

list[rear] = element;

rear++;

modCount++;

}

/**

* Adds the specified element after the specified target element.

* Throws an ElementNotFoundException if the target is not found.

*

* @param element the element to be added after the target element

* @param target the target that the element is to be added after

*/

@Override

public void addAfter(T element, T target)

{

if (size() == list.length)

expandCapacity();

int scan = 0;

// find the insertion point

while (scan < rear && !target.equals(list[scan]))

scan++;

if (scan == rear)

throw new ElementNotFoundException("UnorderedList");

scan++;

// shift elements up one

for (int shift=rear; shift > scan; shift--)

list[shift] = list[shift-1];

// insert element

list[scan] = element;

rear++;

modCount++;

}

}