/**
* Returns the hash code value for this list.
*
* <p>This implementation uses exactly the code that is used to define the list hash function in
* the documentation for the {@link List#hashCode} method.
*
* @return the hash code value for this list
*/
public int hashCode() {
int hashCode = 1;
Iterator<E> i = iterator();
while (i.hasNext()) {
E obj = i.next();
hashCode = 31 * hashCode + (obj == null ? 0 : obj.hashCode());
}
return hashCode;
}
/**
* {@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;
}