public void add(int index, E element) {
if (index < 0 || index > size) throw new IndexOutOfBoundsException();
checkForComodification();
l.add(index + offset, element);
expectedModCount = l.modCount;
size++;
modCount++;
}
/**
* {@inheritDoc}
*
* <p>This implementation gets an iterator over the specified collection and iterates over it,
* inserting the elements obtained from the iterator into this list at the appropriate position,
* one at a time, using {@code add(int, E)}. Many implementations will override this method for
* efficiency.
*
* <p>Note that this implementation throws an {@code UnsupportedOperationException} unless {@link
* #add(int, Object) add(int, E)} is overridden.
*
* @throws UnsupportedOperationException {@inheritDoc}
* @throws ClassCastException {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
* @throws IllegalArgumentException {@inheritDoc}
* @throws IndexOutOfBoundsException {@inheritDoc}
*/
public boolean addAll(int index, Collection<? extends E> c) {
boolean modified = false;
Iterator<? extends E> e = c.iterator();
while (e.hasNext()) {
add(index++, e.next());
modified = true;
}
return modified;
}
/**
* Appends the specified element to the end of this list (optional operation).
*
* <p>Lists that support this operation may place limitations on what elements may be added to
* this list. In particular, some lists will refuse to add null elements, and others will impose
* restrictions on the type of elements that may be added. List classes should clearly specify in
* their documentation any restrictions on what elements may be added.
*
* <p>This implementation calls {@code add(size(), e)}.
*
* <p>Note that this implementation throws an {@code UnsupportedOperationException} unless {@link
* #add(int, Object) add(int, E)} is overridden.
*
* @param e element to be appended to this list
* @return {@code true} (as specified by {@link Collection#add})
* @throws UnsupportedOperationException if the {@code add} operation is not supported by this
* list
* @throws ClassCastException if the class of the specified element prevents it from being added
* to this list
* @throws NullPointerException if the specified element is null and this list does not permit
* null elements
* @throws IllegalArgumentException if some property of this element prevents it from being added
* to this list
*/
public boolean add(E e) {
add(size(), e);
return true;
}