完成一个Applet图形界面程序。功能说明：
file菜单—包括两个菜单项：
open:：打开.gif的图形文件，并显示在窗口里。文
　　　　　　　　 件名在下面的编辑框中给出
exit：结束程序。
edit菜单—包括两个菜单项：
paint：在窗口中画图形，图形的类型及颜色分别由下面的
　　　　　　　　复选框及选择按扭指定。
clear：清空窗口内容。
该作业要求编程并调试通过。对你设计的类要有详细的文字说明（类所封装的内容，属性、方法的功能与含义等）。(Complete a Applet graphical interface program. Function Descr iption:

File menu - including two menu items:

Open:: open the graphics file of the.Gif and display it in the window. writing

The name of the piece is given in the edit box below

Exit: end the program.

Edit menu - including two menu items:

Paint: draw a picture in the window. The type and color of the figure are from the following.

Check box and select the specified button.

Clear: clear the content of the window.

This job requires programming and debugging through. There is a detailed descr iption of the class you have designed (the contents encapsulated in the class, the properties, the function and the meaning of the method, etc.).)