用JAVA语言编制一个画图板，可以画椭圆，圆，直线，矩形，正方形，并可以猜出图形，还由新建，保存，打开文件等功能。-JAVA language used to prepare a drawing board, you can draw an oval, round, straight, rectangular, square, and can guess graphics, but also by the new, preservation, open the file functions.