版本2：满分 15 分

修改版本 1 中Fan 类，让其继承 JPanel 类，并且把 color属性设置为 Color类型，默认

属性为 red。随机产生 radius ，取值范围为 1-5；随机产生颜色，取值范围为 red、blue 、yellow 、

green、orange ；根据 color、radius 属性值绘制风扇。运行如下图：





版本3：满分 20 分

让版本 2 中的风扇转起来。创建一个 FanControl 类包含以下内容：Start 、Stop 、Reverse

按钮，用于开启、关闭、反转控制；一个滚动条控制速度。运行示例如下：-Version 2: 15 points out of a modified version of a class in the Fan, let inherits JPanel class, and the color attribute is set to Color type, default attribute is red. Randomly generated radius, in the range of 1-5　randomly generated color range red, blue, yellow, green, orange　according to color, radius attribute values ​ ​ plotted fan. Run the following diagram: Version 3: Version 2 out of 20 points for the fans turn up. Create a FanControl class contains the following: Start, Stop, Reverse buttons for opening, closing and reverse control　a scroll bar control speed. To run the sample as follows: