使用公共字段创建课程

class SimplePoint {

    public int x = 0;/*来 自 时 代      J a v a   公   众 号 - nowjava.com*/

    public int y = 0;

}

class SimpleRectangle {

    public int width = 0;

    public int height = 0;

    public SimplePoint origin = new SimplePoint();

}