How does this java work?

[Pommie]

I have an Android App that is in Java. I follow most of it but am confused at a particular piece of code. Namely,

protected void onDraw(Canvas c) {
    super.onDraw(c);
    if (DrawingClassArrayList.size() > 0) {
        c.drawPath(
                DrawingClassArrayList.get(DrawingClassArrayList.size() - 1).getPath(),
                DrawingClassArrayList.get(DrawingClassArrayList.size() - 1).getPaint());
    }
}

How does DrawingClassArrayList.size ever change? Is it some kind of counter and if so, how?

Mike.

 

[rjenkinsgb]

Probably a linked list, that can have elements added and linked in as required?

Linked list - Wikipedia

en.wikipedia.org

The actual code appears to be in the "DrawingClassArrayList" object.