public void reverse()
    {
    	ArrayList<String> reverser = new ArrayList<String>();
    	for (String each : trip)
    	{
    		reverser.add(each);
    	}
    	for (int i = trip.size()-1; i >= 0; i--)
    	{
    		trip.remove(i);
    	}
    	for (int i = reverser.size()-1; i >= 0; i--)
    	{
    		trip.add(reverser.get(i));
    	}
    }