code: public void clear() {
  		hashCodeUpToDate = false;
  		modCount++;
  
  		// clear to let GC do its work
  		for (int i = 0; i < size; i++)
  			elementData[i] = null;
  
  		size = 0;
  	}
docs: Removes all of the elements from this list. The list will be empty after
  this call returns.