code: public boolean addAll(final int[] elements) {
  		final int count = elements.length;
  		ensureSize(_size + count);
  		arraycopy(elements, 0, _data, _size, count);
  		_size += count;
  
  		return count != 0;
  	}
docs: Appends all of the elements in the specified array to the end of this
  list.
  
  @param elements array containing elements to be added to this list
  @return <tt>true</tt> if this list changed as a result of the call
  @throws NullPointerException if the specified array is null