您的方法可能与此类似，其中您也使用一个类
CircleList来容纳所有圆和绘制例程：
class CircleList{ static class Circle { public float x, y, diameter; } ArrayList<Circle> circles; public CirclesList() { circles = new ArrayList<Circle>(); } public void draw(Graphics2D g) // draw must be called by paintComponent of the panel { for (Circle c : circles) g.fillOval(c.x, c.y, c.diameter, c.diameter) }}
